for carbonyl as a ligand Metal carbonyl Image carbonyl general.png 150px thumb right Carbonyl group In organic chemistry , a carbonyl group is a functional group composed of a carbon atom double bond double ... larger functional groups. The term carbonyl can also refer to carbon monoxide as a ligand in an inorganic or organometallic complex a metal carbonyl , e.g. nickel carbonyl . The remainder of this article concerns itself with the organic chemistry definition of carbonyl, where carbon and oxygen share a double bond. Carbonyl compounds A carbonyl group characterizes the following types of compounds ... s. Examples of inorganic carbonyl compounds are carbon dioxide and carbonyl sulfide . A special group of carbonyl compounds are 1,3 dicarbonyl compounds that have acidic protons in the central ... Carbonylgruppe.svg thumb Carbonyl group Oxygen is more electronegative than carbon, and thus draws electron density away from carbon to increase the bond s Polarity physics polarity . Therefore, the carbonyl ... or other Lewis acids and bases Lewis Acid forming a oxocarbenium ion. The alpha hydrogen s of a carbonyl ... 390171 3. ref This is because a carbonyl is in tautomeric Resonance chemistry resonance with an enol ... and can alkylate electrophiles such as other carbonyls. Amides are the most stable of the carbonyl ... bonds. Carbonyl groups can be redox reduced by reaction with hydride reagents such as Sodium borohydride ... an unsaturated carbon in conjugation with the carbonyl is alkylated instead of the carbonyl itself ... Aldol condensation , a reaction between an enolate and a carbonyl Cannizzaro reaction , a disproportionation ... Unsaturated carbonyl compounds File Propenal.svg thumb Acrolein , an , unsaturated carbonyl compound. , Unsaturated carbonyl compounds are an important class of carbonyl compounds with the general structure O C C sup sup C sup sup . In these compounds the carbonyl group is conjugated system ... special properties. Unlike the case for simple carbonyls, , unsaturated carbonyl compounds are often ... more details
File Nickel kugeln.jpg thumb right Spheres of nickel, made by the Mond process Carbonyl metallurgy is used to manufacture products of Carbonyl iron iron , nickel , steel , and other metal s. Coatings are produced by vapor plating using metal carbonyl vapors. Carbonyls are metal ligand complexes where carbon monoxide is bonded in a pendant ligand structure to individual atoms of metals such as iron and nickel. Iron carbonyl is stable as iron pentacarbonyl , where five carbon monoxide molecules are pendantly bonded to the iron atom, while nickel carbonyl is stable as nickel tetracarbonyl, which has four carbon monoxide molecules pendantly bonded to the nickel atom. Both can be formed by the exposure of the powdered metal to carbon monoxide gas at temperatures of around 75 degrees Celsius. Both the metal carbonyls decompose near 175 ° C, resulting in a vapor plated metallic coating. The thickness of the vapor plated deposit can be increased to desired thicknesses by controlling the amount of metal carbonyl used and the duration of the plating process. Vale Inco produces over 100 million pounds of nickel metal annually by the carbonyl process . The carbonyl process has been used to produce molds in custom shapes for industry. Such molds have been used in plastic molding and other manufacturing techniques. William Jenkin developed many of the techniques and procedures used in carbonyl metallurgy. Carbonyl metallurgy is useful as a low temperature metal coating technique that may well find many applications in the future. gallery File Nickel carbonyl 2D.png Nickel tetracarbonyl ... recovery and steel manufacture using carbonyl chemistry http www.space mining.com IRONRECOVERY.htm Beneficiation of asteroidal iron by carbonyl metallurgy http www.space mining.com beneficiation.html William Jenkin inventor of numerous carbonyl processes http www.sitereviewboard.com reviews wc wcjenkin com cache.html Preparation of Iron Carbonyl http www.patentstorm.us patents 7276220 description.html ... more details
Carbonyl iron is a highly pure 97.5 for grade S, 99.5 for grade R iron , prepared by chemical decomposition of purified iron pentacarbonyl . It usually has the appearance of grey powder, composed of spherical microparticles. Most of the impurities are carbon , oxygen , and nitrogen . BASF invented carbonyl iron powder in 1925, ref name technology cite web title Carbonyl Iron Powder Technology publisher BASF url http www.inorganics.basf.com p02 CAPortal en GB portal Carbonyleisenpulver B content Produktgruppen Carbonyleisenpulver Technologies Allgemeine Informationen date 2007 08 08 accessdate 2008 01 01 ref and claims to be the world s leading producer. ref name basf cite web title Carbonyl Iron Powder publisher BASF url http www.inorganics.basf.com p02 CAPortal en GB portal Carbonyleisenpulver 0 content Produktgruppen Carbonyleisenpulver Carbonyleisenpulver?add params MenuAction&id Qu3oA8WDtbcp2zc date 2007 08 08 accessdate 2008 01 01 ref In 1934, BASF was also involved in the development of the very first magnetic tapes used by the AEG Magnetophon tape recorder carbonyl iron became the first magnetic recording oxide although quickly replaced in 1936 by iron oxide . In electronics , carbonyl iron is used to manufacture magnetic core s for high frequency coil s, and in production of some ferrite magnet ferrites . Spherical particles manufactured of carbonyl iron are used as a component of the radar absorbing materials used in military, in stealth technology stealth vehicles for example ... products. Powdered core s made of carbonyl iron have high stability of parameters across a wide .... In pharmaceutics , carbonyl iron powder is used to treat iron deficiency medicine iron deficiency and as an iron dietary supplement . Particles of carbonyl iron 20 40 suspended in a carrier fluid 60 80 are used as a magnetorheological fluid . See also Carbonyl nickel , a pure nickel prepared by decomposition of nickel carbonyl References Refimprove date December 2007 references Category Iron ... more details
chembox verifiedrevid 461301610 Name Carbonyl bromide ImageFileL1 Carbonyl bromide.png ImageSizeL1 ImageNameL1 Structural formula of carbonyl bromide ImageFileR1 Carbonyl bromide 3D balls.png ImageSizeR1 110px ImageNameR1 Ball and stick model of carbonyl bromide IUPACName OtherNames Bromophosgene, carbonic dibromide, carbonyl dibromide Reference ref name hand Citation last Lide first David R. author link last2 first2 author2 link publication date date year 1998 title Handbook of Chemistry and Physics edition 87 volume series publication place Boca Raton, FL place publisher CRC Press id isbn 0849305942 doi oclc pages 3 96, 4 50, 5 26 url accessdate ref Section1 Chembox Identifiers CASNo 593 95 3 CASNo Ref cascite correct ?? CASOther RTECS EINECS PubChem 79057 ChemSpiderID Ref chemspidercite correct chemspider ChemSpiderID 71389 SMILES BrC Br O InChI 1 CBr2O c2 1 3 4 InChIKey MOIPGXQKZSZOQX UHFFFAOYAM StdInChI Ref stdinchicite correct chemspider StdInChI 1S CBr2O c2 1 3 4 StdInChIKey Ref stdinchicite correct chemspider StdInChIKey MOIPGXQKZSZOQX UHFFFAOYSA N Section2 Chembox Properties Formula COBr sub 2 sub MolarMass 187.818 g mol Appearance colorless liquid Density 2.52 g ml at 15 C MeltingPt BoilingPt 64.5 C Solubility reacts with water SolubleOther Section3 Chembox Structure Coordination CrystalStruct Section4 Chembox Thermochemistry DeltaHf 127.2 Kilojoule per mole kJ mol sup 1 sup liquid br 96.2 Kilojoule per mole kJ mol sup 1 sup gas DeltaHc Entropy 309.1 J mol sup 1 sup K sup 1 sup gas HeatCapacity 61.8 J mol sup 1 sup K sup 1 sup gas Section7 Chembox Hazards ExternalMSDS EUIndex Not Listed NFPA H 4 NFPA F 0 NFPA R 1 RPhrases SPhrases FlashPt Section8 Chembox Related OtherAnions OtherCations OtherCpds Carbonyl fluoride br Phosgene Carbonyl bromide , also known as bromophosgene ... Carbonyl bromide is formed when carbon tetrabromide is melted and concentrated sulfuric acid is added. Even at low temperatures, carbonyl bromide decomposes to carbon monoxide and elemental bromine ... more details
chembox Watchedfields changed verifiedrevid 451721846 Name Carbonyl sulfide ImageFile Carbonyl sulfide 2D dimensions.png ImageSize 150px ImageName Carbonyl sulfide ImageFile1 Carbonyl sulfide 3D vdW.png ImageSize1 150px ImageName1 Space filling 3D model of carbonyl sulfide IUPACName Carbon oxide sulfide ... ExternalMSDS http ptcl.chem.ox.ac.uk MSDS CA carbonyl sulfide.html Carbonyl sulfide MSDS EUIndex ... Carbonyl sulfide is the chemical compound with the chemical formula formula OCS. Commonly written ... of a carbonyl group double bond ed to a sulfur atom. Carbonyl sulfide can be considered to be intermediate between carbon dioxide and carbon disulfide , both of which are isoelectronic with it. Carbonyl ... title Carbonyl Sulfide CASRN 463 58 1 work Hazardous Substances Data Bank publisher National Library ... Summary for Carbonyl Sulfide publisher U.S. Environmental Protection Agency ref ref cite journal ... of carbonyl sulphide COS by higher plant carbonic anhydrase CA journal Atmospheric Environment year ... of the Miller Urey experiment and it is suggested that carbonyl sulfide played a significant role in the origin of life . ref cite journal title Carbonyl Sulfide Mediated Prebiotic Formation of Peptides ... 5694 pages 283 286 doi 10.1126 science.1102722 pmid 15472077 ref Occurrence Carbonyl sulfide is the most ... J. W. title A 350 year atmospheric history for carbonyl sulfide inferred from Antarctic firn air ... 22302 id eid D22302 doi 10.1029 2004JD004686 bibcode 2004JGRD..10922302M ref Some carbonyl sulfide that is transported ... name Seinfeld 2006 Carbonyl sulfide is also removed from the atmosphere by terrestrial vegetation ... waters. ref cite journal last1 Kettle first1 A. J. title Global budget of atmospheric carbonyl ... 2007 title On the global distribution, seasonality, and budget of atmospheric carbonyl sulfide COS ... man made sources of carbonyl sulfide release include its primary use as a chemical intermediate ... total worldwide release of carbonyl sulfide to the atmosphere has been estimated at about ... more details
chembox verifiedrevid 450901754 Name Carbonyl fluoride ImageFileL1 Carbonyl fluoride 2D.png ImageSizeL1 125px ImageNameL1 Structure of carbonyl fluoride ImageFileR1 Carbonyl fluoride 3D vdW.png ImageSizeR1 125px ImageNameR1 Space filling model of the carbonyl fluoride molecule IUPACName Carbonyl difluoride OtherNames Fluorophosgene br Carbon difluoride oxide Section1 Chembox Identifiers SMILES FC F O ChemSpiderID Ref chemspidercite correct chemspider ChemSpiderID 9246 InChI 1 CF2O c2 1 3 4 InChIKey IYRWEQXVUNLMAY UHFFFAOYAE StdInChI Ref stdinchicite correct chemspider StdInChI 1S CF2O c2 1 3 4 StdInChIKey Ref stdinchicite correct chemspider StdInChIKey IYRWEQXVUNLMAY UHFFFAOYSA N CASNo 353 50 4 CASNo Ref cascite correct CAS RTECS FG6125000 UNNumber 2417 Section2 Chembox Properties Formula COF sub 2 sub MolarMass 66.01 g mol sup 1 sup Appearance Colorless gas Density 2.698 g dm sup 3 sup gas Solubility MeltingPtC 111.26 BoilingPtC 84.57 Section3 Chembox Structure MolShape C sub 2v sub Dipole 0.95 Debye D Section7 Chembox Hazards ExternalMSDS MainHazards Highly toxic Often fatal , Water reactive FlashPt Non flammable NFPA H 4 NFPA F 0 NFPA R 2 NFPA O RPhrases SPhrases Section8 Chembox Related Function OtherFunctn OtherCpds Phosgene Carbonyl fluoride is the chemical compound with the chemical formula formula COF sub 2 sub . This gas, like its analog phosgene , is highly toxic. The molecule is planar with C sub 2v sub symmetry group symmetry . Reactions Carbonyl fluoride is unstable in the presence of water. Safety Carbonyl fluoride is extremely poisonous and inhalation can be deadly. The Threshold Limit Value threshold limit value is 2 ppm for short term exposure. References Unreferenced date September 2007 references Category Inorganic carbon compounds Category Oxohalides Category Nonmetal halides organohalide stub ar cs Karbonylfluorid de Carbonylfluorid fa it Fluorofosgene hu Karbonil fluorid nl Carbonylfluoride ja sv Karbonylfluorid ... more details
chembox verifiedrevid 385833910 Name Vanadium carbonyl ImageFile V CO 6.png ImageSize 200px ImageName Vanadium carbonyl IUPACName hexacarbonylvanadium 0 OtherNames vanadium carbonyl Section1 Chembox Identifiers CASNo 20644 87 5 ChEBI Ref ebicite correct EBI ChEBI 37857 RTECS Section2 Chembox Properties Formula C sub 6 sub O sub 6 sub V MolarMass 219.00 g mol Appearance blue green crystals br yellow solutions Density Solubility insoluble Solvent other solvents SolubleOther 5 g L hexane br more soluble in dichloromethane MeltingPt decomp BoilingPt sublimes 50 C 15 mm Hg Section3 Chembox Structure Coordination octahedral CrystalStruct orthorhombic Dipole 0 Debye D Section7 Chembox Hazards ExternalMSDS MainHazards CO source RPhrases SPhrases Section8 Chembox Related Function compounds OtherFunctn Chromium carbonyl Cr CO sub 6 sub , V CO sub 6 sub sub sub , Vanadium III chloride VCl sub 3 sub Vanadium carbonyl , also known as vanadium hexacarbonyl , is the inorganic compound with the chemical formula formula V CO sub 6 sub . This highly reactive species is noteworthy from theoretical and scholarly perspectives. It is a rare isolable homoleptic metal carbonyl that is paramagnetic. Most species with the formula M sub x sub CO sub y sub follow the eighteen electron rule 18e rule , whereas V CO sub 6 sub has 17 valence electrons. ref C. Elschenbroich, A. Salzer Organometallics A Concise Introduction 2nd Ed 1992 from Wiley VCH Weinheim. ISBN 3 527 28165 7 ref Synthesis Traditionally V CO sub 6 sub is prepared in two steps via the intermediacy of V CO sub 6 sub sup nowiki &minus nowiki sup . In the first step, VCl sub 3 sub is reduced with metallic sodium under 200 atm CO at 160 C. The solvent for this reduction is typically diglyme , CH sub 3 sub OCH sub 2 sub CH sub 2 sub OCH sub 2 sub CH sub 2 sub OCH sub 3 sub . This tri ether solubilizes sodium salts, akin to the behavior of a crown ... 1962, volume 44, 990 6. Vanadium compounds Category Vanadium compounds Category Carbonyl complexes ... more details
File Alcohols from ester via reduction.png thumb synthesis of an alcohol by ester reduction Carbonyl reduction in organic chemistry is the organic reduction of any carbonyl group containing compound by a reducing agent . Typical carbonyl compounds are ketone s, aldehyde s, carboxylic acid s and ester s. A carbonyl group can be reduced to the alcohol or the oxygen atom can be removed altogether, a process called deoxygenation . Many reducing agents are metal hydride s based on boron and aluminum . A second important method is catalytic hydrogenation . ref Advanced organic chemistry Structure and mechanisms Francis A. Carey, Richard J. Sundberg 2nd Ed. ref ref JerryMarch ref Metal hydride mechanism The reaction mechanism for metal hydride reduction is based on activation of the carbonyl group by the metal followed by nucleophilic addition of hydride. Another general system is catalytic hydrogenation by metal. LiAlH sub 4 sub is more reactive than NaAlH sub 4 sub because the smaller lithium cation is a better Lewis acid . A crown ether reduces reactivity. Alkoxide substitution in metal hydrides increases solubility and selectivity. An example is Red Al . Aldehyde and ketone reduction The reaction product of the reduction of an aldehyde is a primary alcohol and that of a ketone a secondary alcohol . Reagents are lithium aluminium hydride , ref Organic Syntheses, Coll. Vol. 7, p.129 1990 Vol. 60, p.25 1981 . http orgsynth.org orgsyn pdfs CV7P0129.pdf Link ref ref Organic Syntheses, Coll. Vol. 6, p.887 1988 Vol. 58, p.12 1978 . http orgsynth.org orgsyn pdfs CV6P0887.pdf Link ref ref Organic Syntheses, Coll. Vol. 6, p.769 1988 Vol. 56, p.101 1977 . http orgsynth.org orgsyn pdfs CV6P0769.pdf Link ref diisobutylaluminium hydride , sodium borohydride , L selectride , diborane , diazene ... substrate is an unsaturated carbonyl compound, an enone or enal . The 1,2 reduction product an allyl ... catalytic reduction Main Enantioselective reduction of ketones Well known carbonyl reductions ... more details
may be homoleptic , that is containing only CO ligand s, such as nickel carbonyl Ni ..., for example hydroformylation , and metal carbonyl catalysts are central to its utilization. Metal ... shorter than a metal alkyl bond. Bridging carbonyls The carbonyl ligand engages in a range of bonding modes in metal carbonyl clusters. Many feature CO in a bridging position. ref name Elsch ref P. J. Dyson and J. S. McIndoe, Transition Metal Carbonyl Cluster Chemistry, Gordon & Breach Amsterdam ... infrared vibrational spectra of stable and unstable rhodium carbonyl clusters journal Vibrational Spectroscopy ... prototypical metal carbonyl complexes. ref cite book author1 Miessler, Gary L. author2 Tarr ... is infra red spectroscopy . ref name Braterman P. S. Braterman Metal carbonyl spectra Academic Press ... of the molecule during its vibration. The vibrational modes of a metal carbonyl complexcan ... carbonyl ligands is IR allowed. Thus, only a single sub CO sub band is observed in the IR spectra ..., 2000 class wikitable carbonyl sub CO sub , sub 1 sub cm sup 1 sup sub CO sub , sub 2 sub cm ... F.C. ref Iron carbonyl clusters were also observed in Chondrite Jiange H5 chondrites identified by infrared ... Carbonyl Clusters in the Jiange H5 Chondrite journal Lunar and Planetary Science year 1996 volume ..., showing the carbonyl ligand at the apical position, trans to the histidine residue. ref cite journal ... metal carbonyls as well as homo and hetero metallic carbonyl clusters. ref Name WAH Direct reaction ... sub 100 bar, 175 ° C Nickel carbonyl is formed with carbon monoxide already at 80 C and atmospheric ... is formed, as in the preparation of osmium carbonyl chloride from the chloride salts. ref Name WAH Carbon monoxide is also suitable for the reduction of sulfides , where carbonyl sulfide is the byproduct ... dodecacarbonyl Os sub 3 sub CO sub 12 sub provides higher nuclear osmium carbonyl clusters such as Os ... sub 2 sub sub 2 sub &rarr 2 RuCo sub 2 sub CO sub 11 sub 4 KCl Metal carbonyl cations and carbonylates ... more details
enzyme Name carbonyl reductase NADPH EC number 1.1.1.184 CAS number 89700 36 7 IUBMB EC number 1 1 1 184 GO code 0004090 image width caption Image Carbonyl reductase 1WMA.png thumb Ribbon diagram of human carbonyl reductase 1, in complex with Nicotinamide adenine dinucleotide phosphate NADPH and a small molecule enzyme inhibitor inhibitor not shown . From PDB 1WMA . In enzymology , a carbonyl reductase NADPH EC number 1.1.1.184 is an enzyme that catalysis catalyzes the chemical reaction R CHOH R NADP sup sup math rightleftharpoons math R CO R NADPH H sup sup Thus, the two substrate biochemistry substrates of this enzyme are R CHOH R and nicotinamide adenine dinucleotide phosphate NADP sup sup , whereas its 3 product chemistry products are R CO R , nicotinamide adenine dinucleotide phosphate NADPH , and hydrogen ion H sup sup . This enzyme belongs to the family of oxidoreductase s, specifically those acting on the CH OH group of donor with NAD or NADP as acceptor. The systematic name of this enzyme class is secondary alcohol NADP oxidoreductase . Other names in common use include aldehyde reductase 1 , prostaglandin 9 ketoreductase , xenobiotic ketone reductase , NADPH dependent carbonyl reductase , ALR3 , carbonyl reductase , nonspecific NADPH dependent carbonyl reductase , aldehyde reductase 1 , and carbonyl reductase NADPH . This enzyme participates in arachidonic acid metabolism , and has recently been shown to catabolize S Nitrosoglutathione, as a means to degrade NO in an NADPH dependent manner. Structural studies As of late 2007, 4 tertiary structure structures have been solved for this class of enzymes, with Protein Data Bank PDB accession codes PDB link 1CYD , PDB link 1WMA , PDB link 2HRB , and PDB link 2PFG . References reflist 1 cite journal author Ahmed NK, Felsted RL, Bachur NR date 1978 title Heterogeneity of anthracycline antibiotic carbonyl reductases in mammalian ... title Purification and properties of an NADPH dependent carbonyl reductase from human brain. Relationship ... more details
DISPLAYTITLE Carbonyl cyanide p trifluoromethoxyphenylhydrazone chembox verifiedrevid 414048120 Name Carbonyl cyanide p trifluoromethoxyphenylhydrazone ImageFile Carbonyl cyanide p trifluoromethoxyphenylhydrazone.svg ImageSize 250px IUPACName OtherNames Reference ref http pubchem.ncbi.nlm.nih.gov summary summary.cgi?cid 3330&loc ec rcs FCCP Compound Summary , PubChem . ref Section1 Chembox Identifiers ChemSpiderID Ref chemspidercite correct chemspider ChemSpiderID 3213 InChI 1 C10H5F3N4O c11 10 12,13 18 9 3 1 7 2 4 9 16 17 8 5 14 6 15 h1 4,16H InChIKey BMZRVOVNUMQTIN UHFFFAOYAT SMILES1 FC F F Oc1ccc cc1 N N C C N C N ChEMBL Ref ebicite correct EBI ChEMBL 457504 StdInChI Ref stdinchicite correct chemspider StdInChI 1S C10H5F3N4O c11 10 12,13 18 9 3 1 7 2 4 9 16 17 8 5 14 6 15 h1 4,16H StdInChIKey Ref stdinchicite correct chemspider StdInChIKey BMZRVOVNUMQTIN UHFFFAOYSA N CASNo 370 86 5 PubChem 3330 SMILES C1 CC CC C1NN C C N C N OC F F F MeSHName FCCP Section2 Chembox Properties Formula C sub 10 sub H sub 5 sub F sub 3 sub N sub 4 sub O MolarMass 254.16811 g mol Appearance Density MeltingPt BoilingPt Section3 Chembox Hazards Solubility MainHazards FlashPt Autoignition Carbonyl cyanide p trifluoromethoxyphenylhydrazone FCCP is an ionophore that is a mobile ion carrier . It referred to as an uncoupling protein uncoupling agent because it disrupts Adenosine triphosphate ATP ATP synthase synthesis by transporting hydrogen ions through a cell membrane before they can be used to provide the energy for oxidative phosphorylation . ref http www.nlm.nih.gov cgi mesh 2007 MB cgi?mode &term FCCP MeSH Descriptor Data , Medical Subject Headings MeSH . ref It is a nitrile and hydrazone . References reflist See also Carbonyl cyanide m chlorophenyl hydrazone CCCP Category Ionophores Category Nitriles biochem stub fa it Carbonil cianuro p trifluorometossifenil idrazone ja p ... more details
Hydrocyanation of unsaturated carbonyl compounds is a special case of the Michael reaction which can lead to cyanoketones, cyano cyanohydrins, or vinyl cyanohydrins. Fine tuning reaction conditions allows access to any of these products. ref Nagata, W. Yoshioka, M. Org. React. 1977 , 25 , 255. doi 10.1002 0471264180.or025.03 ref Introduction Hydrocyanation refers to the addition of the elements of hydrogen and cyanide across a multiple bond. When the multiple bond is polarized by an electron withdrawing group, selective addition results. However, when the electron withdrawing group is a carbonyl, the possibility of 1,2 direct addition to the carbonyl group exists. Methodological advances now permit access to both direct and conjugate addition products. span style float right padding right 50px padding top 30px 1 span center File CNgen.png 357px center Diastereoselectivity can be achieved in prochiral , conformationally restricted substrates. Catalytic, enantioselective methods, however .... When trialkylaluminums are combined with hydrogen cyanide prior to the introduction of the carbonyl compound, a cyanoaluminate anion forms and acts as the active cyanating agent after activation of the carbonyl ... center When neutral, pre formed dialkylaluminum cyanides are used, both carbonyl activation and nucleophilic .... The structure of the carbonyl compound is important, as substitution and nearby angular substituents ... , favor 1,2 addition. Scope and Limitations Hydrogen cyanide alone is not reactive enough to add to carbonyl ... basic conditions. Nucleophilic solvents may add competitively to the carbonyl substrate. Michael addition of cyanated products to the unsaturated carbonyl starting material is also an important side reaction ... for base stable functionality, a wide variety of carbonyl substrates undergo conjugative hydrocyanation ... , Coll. Vol. IV , 804. ref , nitriles ref Kurtz, P. Ann. Chem. 1951 , 572 , 23. ref and other carbonyl ... is generally high in these addition reactions, and the resulting cyano carbonyl compounds can ... more details
File Burgi Dunitz trajectory.png thumb Burgi Dunitz trajectory The nucleophilic attack on the carbonyl ..., NR sub 2 sub , or Cl are conjugated with the carbonyl group, which means that addition to the carbonyl ... carbonyl group e.g.cyclol ref cite journal last Cerrini first S. coauthors Fedeli W., Mazza ... intermediate decomposition into its respective carbonyl species, and to measure the IR ... are essentially tetrahedral intermediates. They form when nucleophiles add to a carbonyl group ... to the carbonyl atom shift the equilibrium constant toward the hemiacetal. They increase the polarization of the carbonyl group, which already has a positively polarized carbonyl carbon, and make ... carbonyl compounds. Hexafluoroacetone is probably the most hydrated carbonyl compound possible. Formaldehyde ... is about 60 . So the addition to the carbonyl group allows some of the strain inherent in the small ... is due to entropy and the proximity of the nucleophile to the carbonyl group. Formation of an acyclic ... hemiacetal the reaction is intramolecular so the nucleophile is always held close to the carbonyl ..., losing the oxygen atom that once belonged to the parent aldehyde s carbonyl group. These oxonium ... more details
DISPLAYTITLE Carbonyl cyanide m chlorophenyl hydrazone chembox verifiedrevid 443498754 Name Carbonyl cyanide m chlorophenyl hydrazone ImageFile Carbonyl cyanide m chlorophenyl hydrazone.svg ImageSize IUPACName 3 chlorophenyl hydrazono malononitrile OtherNames Section1 Chembox Identifiers ChemSpiderID Ref chemspidercite correct chemspider ChemSpiderID 2504 KEGG Ref keggcite correct kegg KEGG C11164 InChI 1 C9H5ClN4 c10 7 2 1 3 8 4 7 13 14 9 5 11 6 12 h1 4,13H InChIKey UGTJLJZQQFGTJD UHFFFAOYAQ ChEMBL Ref ebicite correct EBI ChEMBL 224214 StdInChI Ref stdinchicite correct chemspider StdInChI 1S C9H5ClN4 c10 7 2 1 3 8 4 7 13 14 9 5 11 6 12 h1 4,13H StdInChIKey Ref stdinchicite correct chemspider StdInChIKey UGTJLJZQQFGTJD UHFFFAOYSA N CASNo Ref cascite correct CAS CASNo 555 60 2 PubChem 2603 ChEBI Ref ebicite correct EBI ChEBI 3259 SMILES Clc1cc N N C C N C N ccc1 MeSHName CCCP Section2 Chembox Properties C 9 H 5 Cl 1 N 4 MolarMass 204.616 g mol Appearance Density MeltingPt BoilingPt Section3 Chembox Hazards Solubility MainHazards FlashPt Autoignition Carbonyl cyanide m chlorophenyl hydrazone CCCP , is a chemical inhibitor of oxidative phosphorylation . It is a nitrile , hydrazone and ionophore . In general, CCCP causes the gradual destruction of living cells and death of the organism. ref name park97 cite journal author J.W. Park coauthors S.Y. Lee, J.Y. Yang, H.W. Rho, B.H. Park, S.N. Lim, J.S. Kim, H.R. Kim year 1997 title Effect of carbonyl cyanide m chlorophenylhydrazone CCCP on the dimerization of lipoprotein lipase. journal Biochimica et Biophysica Acta volume 1344 issue 2 pages 132 8 pmid 9030190 ref ref name brod99 cite journal author D. G kov coauthors B. Brodsk , A. Holoubek, K. Sigler year 1999 title Factors and processes involved in membrane potential build up in yeast diS C3 3 assay url http apps.isiknowledge.com full record.do?product UA&search mode GeneralSearch&qid 1&SID S1OH84h3mBDFNnOFaen&page 1&doc 1&colname WOS journal The International Journal of Biochemistry ... more details
Carbonyl oxidation with hypervalent iodine reagents involves the functionalization of the position of carbonyl compounds through the intermediacy of a hypervalent iodine III enolate species. This electrophilic intermediate may be attacked by a variety of nucleophiles or undergo rearrangement or elimination. ref Moriarty, R. M. Prakash, O. Org. React. 1999 , 54 , 273. doi http dx.doi.org 10.1002 0471264180.or054.02 10.1002 0471264180.or054.02 ref Introduction Hypervalent iodine III compounds are attractive oxidizing agents because of their stability and selectivity. In the presence of enolizable carbonyl compounds, they are able to accomplish oxidative functionalization of the position. A key iodine III enolate intermediate forms, which then undergoes either nucleophilic substitution functionalization ... of carbonyl oxidation by iodine III reagents varies as a function of substrate structure and reaction ... at the carbonyl carbon is faster than attack at the carbon. Iodine displacement is actually accomplished intramolecularly by the carbonyl oxygen, which becomes the hydroxyl oxygen in the product ... carbonyl complex, it was shown that displacement of iodine likely occurs with inversion of configuration ... CHIStereo1.png center Studies on the oxidation of unsaturated carbonyl compounds also provide stereochemical ... center Oxytosylation facilitates the elaboration of carbonyl compounds into a variety of functionalized ... undergo many of the same reactions as carbonyl compounds in the presence of iodine III reagents ... hypervalent iodine oxidations of carbonyl compounds. Aryl migration may occur under acidic conditions ... carbonyl compounds in the absence of functional handles. For instance, dehydrogenation is employed ... center File CHISynth.png center Comparison with Other Methods Few compounds that oxidize carbonyl compounds ... for the hydroxylation of carbonyl compounds may employ toxic organometallic compounds such as lead ... peroxide equation 14 . The most popular method for the hydroxylation of carbonyl compounds is the Rubottom ... more details
of the carbonyl. This angle, sometimes referred by the Greek letter psi, can be understood as a measure ... behind the carbonyl carbon i.e., offset from the second, perpendicular plane also containing the C O bond of the carbonyl . The reasons for such offset lie in attractions and repulsions steric, electrostatic ... angle, which is affected by the steric bulk of the substituents of the carbonyl. Thus, aldehydes ... more details
mergeto acetal date February 2011 unreferenced date August 2011 Image Acetalisation.png thumb right 300px Acetalisation Acetalisation is an organic reaction that involves the formation of an acetal or ketal . One way of acetal formation is the nucleophilic addition of an alcohol to a ketone or an aldehyde . Acetalisation is often used in organic synthesis to create a protecting group because it is a reversible reaction. Acetalisation of carbonyl groups by alcohols Acetalisation is acid catalysis catalysed with elimination of water. The reaction can be driven to the acetal when water is removed from the reaction system either by azeotropic distillation or trapping water with molecular sieve s or aluminium oxide . The general reaction mechanism for acetalisation of a carbonyl group is shown to the right. The carbonyl group in 1 abstracts a proton from hydrochloric acid . The protonated carbonyl group 2 is activated for nucleophilic addition of the alcohol. The structures 2a and 2b are mesomer s. After deprotonation of 3 by water the hemiacetal or hemiketal 4 is formed. The hydroxyl group in 4 is protonated leading to the oxonium ion 6 which accepts a second alcohol group to 7 with a final deprotonation to the acetal 8 . The reverse reaction takes place by adding water in the same acidic medium. Acetals are stable towards base chemistry basic media. In a transacetalisation or crossacetalisation a diol reacts with an acetal or two different acetals react with each other. Again this is possible because all the reaction steps are equilibria. See also List of organic reactions Carbohydrate acetalisation References Reflist Category Organic reactions de Acetalbildung nl Acetalisering ... more details
Amide group may refer to Amide , an organic functional group characterized by a carbonyl group linked to a nitrogen atom, or a compound that contains this functional group Peptide bond , a chemical bond formed between two molecules when the carboxyl group of one molecule reacts with the amine group of the other molecule disambig ... more details
class toccolours border 1 style float right clear right margin 0 0 1em 1em border collapse collapse align center bgcolor ffffff Image Azide 2D.png 100px br br Image Nitrone.png 120px br br Image Nitro group 2D.png 100px From top to bottom, br azides, nitrones, and br nitro compounds are br examples of 1,3 dipoles. In organic chemistry , a 1,3 dipolar compound or 1,3 dipole is a dipolar compound with delocalized electron s and a separation of charge over three atoms. They are reactants in 1,3 dipolar cycloaddition s. ref cite book title Advanced Organic Chemistry chapter Part A Structure and mechanisms author Francis A. Carey, Richard J. Sundberg edition 5, illustrated publisher Springer year 2007 page 874 isbn 9780387448978 ref ref IUPAC Gold Book http goldbook.iupac.org D01753.html dipolar compounds ref Known 1,3 dipoles are Azide s Ozone Nitro compound s Diazo compounds Some oxide s File Carbonyl oxide resonance.svg thumb Carbonyl oxide Azoxide compounds Carbonyl oxide s Criegee zwitterion s ref http www.organic chemistry.org namedreactions ozonolysis criegee mechanism.shtm Ozonolysis mechanism on Organic Chemistry Portal site ref ref Li, Jie Jack http www.springerlink.com content p723n6134737nh33 Criegee mechanism of ozonolysis Book Name Reactions. 2006, 173 174, DOI 10.1007 3 540 30031 7 77 ref Nitrile oxide s Nitrous oxide Nitrone s Some imine s Azomethine imine Nitrilimine s Carbonyl imine s Some ylide s Azomethine ylide Nitrile ylide Carbonyl ylide References Reflist Category Organic chemistry fr 1,3 dipole nl 1,3 dipolaire verbinding ja 1,3 pl 1,3 Dipole zh 1,3 ... more details
a benzenediol and a carboxylate sup 3 sup . Overall, the carbonylcarbonyl group is oxidized, and the hydrogen ... reaction addition of a hydroperoxide ion anion to the carbonyl carbon , forming a Tetrahedral carbonyl ... carbonyl carbon forms a second tetrahedral intermediate 4 , which collapses, eliminating a phenol ... addition of hydroperoxide to the carbonyl carbon and 1,2 aryl migration sup 5 sup . Therefore ... electrophilicity of the carbonyl carbon, and the speed of 1,2 aryl migration. The alkyl substituents on the carbonyl carbon, the relative positions of the hydroxyl and carbonyl groups on the aryl ring ... than phenyl ketones because the ketone carbonyl carbon is less electrophilic than the aldehyde carbonyl carbon sup 3 sup . The difference can be mitigated by increasing the temperature of the reaction mixture sup 9 sup . Relative positions of hydroxyl and carbonyl groups File Hydrogen bond stabilization ... hydrogen bond can form between the hydroxyl hydrogen and the carbonyl oxygen , stabilizing a resonance chemistry resonance structure with positive electric charge charge on the carbonyl carbon, thus increasing the carbonyl carbon s electrophilicity 7 . Lacking this stabilization, the carbonyl ... to the carbonyl group concentrate electron density at the aryl carbon chemical bond bonded to the carbonyl ... donating groups ortho or para to the carbonyl group increases electron density at the migrating carbon ... meta to the carbonyl group does not change electron density at the migrating carbon because unsubstituted ... withdrawing groups ortho or para to the carbonyl decreases electron density at the migrating ... oxygen. When the hydroxyl group is ortho or para to the carbonyl group, deprotonation increases ... peroxide, and catalysis catalytic sulfuric acid , the carbonyl oxygen is protonation protonated 14 , after which hydrogen peroxide adds as a nucleophile to the carbonyl carbon, forming a tetrahedral ... to the carbonyl carbon forms another tetrahedral intermediate 19 . Following a second intramolecular ... more details
compared to 90 by the HOMO of the nucleophile on the LUMO of the carbonyl, the nucleophile avoids both the atomic orbital and the antibonding nodes of the orbital of the carbonyl LUMO, realistically ... angle was integral to the understanding the asymmetric induction of hindered carbonyl centers ... more details
A metallacarboxylic acid is a metal complex with the ligand CO sub 2 sub H. These compounds are intermediates in reactions that involve fundamental substrates, carbon monoxide and carbon dioxide , such as the water gas shift reaction . Preparation Metallacarboxylic acids mainly arise by the attack of hydroxide on electrophilic metal carbonyl complex es. An illustrative synthesis is the reaction of a cationic iron carbonyl with a stoichiometric amount of base ref I.S.Kolomnikov, T.V.Lysyak, S.L.Rusakov, and Yu.Ya.Kharitonov Metal carboxylic Acids and Their Derivatives Russ. Chem. Rev. 1988, vol. 57, pp. 406. http iopscience.iop.org 0036 021X 57 5 R02. ref C sub 5 sub H sub 5 sub CO sub 2 sub FeCO BF sub 4 sub NaOH C sub 5 sub H sub 5 sub CO sub 2 sub FeCO sub 2 sub H Many derivatives of metallacarboxylic acids have been prepared including metallacarboxylate esters L sub n sub MCO sub 2 sub R , metallacarboxylic amides L sub n sub MC O NR sub 2 sub , and metallacarboxylates L sub n sub MCO sub 2 sub sup sup . References references Category Carbonyl complexes Category Organometallic chemistry Category Transition metals ... more details
PBB geneid 873 Carbonyl reductase 1 , also known as CBR1 , is an enzyme which in humans is encoded by the CBR1 gene . ref name entrez cite web title Entrez Gene CBR1 carbonyl reductase 1 url http www.ncbi.nlm.nih.gov ... cite journal author Lemieux N, Malfoy B, Forrest GL title Human carbonyl reductase CBR localized ... doi 10.1016 j.cbi.2008.10.040 url ref Function Carbonyl reductase is one of several monomeric, nicotinamide adenine dinucleotide phosphate NADPH dependent oxidoreductase s having wide specificity for carbonyl compounds. This enzyme is widely distributed in human tissues. Another carbonyl reductase ... . ref name pmid3083821 cite journal author Wermuth B, Platts KL, Seidel A, Oesch F title Carbonyl reductase ... genetic polymorphism on human carbonyl reductase 1 CBR1 V88I impacts on catalytic activity and NADPH ... JL, Relling MV, Blanco JG title Pharmacogenetics of human carbonyl reductase 1 CBR1 in livers ... localization of carbonyl reductase in human tissues journal J. Histochem. Cytochem. volume ... Inazu N, Ruepp B, Wirth H, Wermuth B title Carbonyl reductase from human testis purification and comparison with carbonyl reductase from human brain and rat testis journal Biochim. Biophys. Acta volume ... sequence and expression of a cloned human carbonyl reductase gene with daunorubicin reductase activity ... cite journal author Forrest GL title Induction of a human carbonyl reductase gene located on chromosome ... first9 T cite journal author Wermuth B, Platts KL, Seidel A, Oesch F title Carbonyl reductase provides ... B title Human carbonyl reductase. Nucleotide sequence analysis of a cDNA and amino acid sequence ... Kinetics of carbonyl reductase from human brain journal Biochem. J. volume 244 issue 1 pages 165 71 ... of an NADPH dependent carbonyl reductase from human brain. Relationship to prostaglandin 9 ketoreductase ... of carbonyl reductase from rat testis journal Eur. J. Biochem. volume 228 issue 2 pages 473 ... Carboxyethyllysine in a protein native carbonyl reductase NADP dependent prostaglandin dehydrogenase ... more details
Image D glyceraldehyde 2D skeletal.png 150px thumb Glyceraldehyde D Glyceraldehyde is an aldose aldotrioses because the carbonyl group is at the end of the chain Image Dihydroxyacetone.png 150px thumb Dihydroxyacetone is a ketone ketotriose because the carbonyl group is in the middle of the chain. A triose is a monosaccharide , or simple sugar, containing three carbon atom s. There are only three possible trioses Glyceraldehyde L Glyceraldehyde and Glyceraldehyde D Glyceraldehyde , both aldose aldotrioses because the carbonyl group is at the end of the chain, and dihydroxyacetone , a ketone ketotriose because the carbonyl group is in the middle of the chain. ref cite web title Trioses Three Carbon Sugars publisher Oxford University Press accessdate 2011 07 10 url http www.oup.com us static companion.websites 9780195305753 molecules triose.html ref Trioses are important in cellular respiration . During glycolysis , Fructose 1,6 diphosphate is broken down into glyceraldehyde 3 phosphate and dihydroxyacetone phosphate. lactic acid and pyruvic acid are later derived from these molecules. ref cite web title Glycolysis in Detail publisher Ohio State University at Mansfield accessdate 2011 07 10 url http www.mansfield.ohio state.edu sabedon biol4025.htm ref References Reflist See also Aldose Ketose Diose Tetrose Pentose Hexose Heptose Octose Nonose Carbohydrates Category Monosaccharides Biochem stub bg ca Triosa de Triosen es Triosa eo Triozo fr Triose gl Triosa ko it Trioso ja pl Triozy pt Triose ru sr Trioza sv Trios ta tr Trioz zh ... more details
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