PT24 Handbook of Chalcogen Chemistry New Perspectives in Sulfur, Selenium and Tellurium ... goldbook.iupac.org A00266.html amides . Chalcogen replacement analogues of amides are called thio ... of GaAs 001 surfaces by chalcogen atoms S, Se and Te Surface Science Volume 255, Issue 3, 2 September ... pnictide . Although the word chalcogen is literally taken from Greek words being copper former ... number of the most common chalcogen compounds is 2. Other values, such as 1 in pyrite , can be attained ... s Etymology The name chalcogen comes from the Greek words chalkos, literally copper , and ... Chalcogen journal Journal of Chemical Education year 2001 volume 78 issue 10 pages 1333 doi 10.1021 ... that chalcogen means copper former , this is misleading because the chalcogens have nothing to do with copper in particular. Ore former has been suggested as a better translation, ref name chalcogen ... 9 pages 1063 doi 10.1021 ed074p1063 title A Note on the Term Chalcogen bibcode 1997JChEd..74.1063J ... is also another example of a toxic chalcogen. It has no biological role and is slightly toxic ... cs Chalkogen cy Chalcogen de Chalkogene el es Anf geno eo Elemento de grupo 16 eu Anfigeno ... more details
Unreferenced stub auto yes date December 2009 The chalcohalides are binary molecules formed of chemical element s taken from the chalcogen s periodic table group 16 and the halide s periodic table group 17 . Examples Sulfur chloride Oxygen fluoride Tellurium chloride Selenium chloride Sulfur fluoride Category Chalcohalides Inorganic compound stub ... more details
saved book title Chalcogens subtitle An overview cover image SeBlackRed.jpg cover color Chalcogens An overview Properties Chalcogen Elements Oxygen Sulfur Selenium Tellurium Polonium Ununhexium Category Wikipedia books on chemistry Category Wikipedia books on chemical elements Category Chalcogens Wikipedia books on elements ... more details
chembox Verifiedfields changed verifiedrevid Name Ditellurium bromide OtherNames Section1 Chembox Identifiers CASNo Ref cascite changed ?? CASNo 12514 37 3 PubChem Section2 Chembox Properties Formula Te sub 2 sub Br MolarMass Appearance Density MeltingPt BoilingPt Section3 Chembox Structure CrystalStruct Soluble Solubility ? Magnetic susceptibility Section7 Chembox Hazards EUClass Section8 Chembox Related OtherAnions tritellurium dichloride OtherCations selenium dibromide OtherCpds tellurium tetrabromide Ditellurium bromide is the inorganic compound with the formula Tellurium Te sub 2 sub bromide Br . It is one of the few stable lower bromides of tellurium. Unlike sulfur and selenium, tellurium forms families of polymeric subhalide s where the chalcogen halide ratio is less than 2. ref Greenwood&Earnshaw2nd ref Preparation and properties Te sub 2 sub Br is a gray solid. Its structure consists of a chain of Te atoms with Br occupying a doubly bridging ligand bridged site . It is prepared by heating Te with the appropriate stoichiometry of bromine near 215 C. The corresponding chloride and iodide, Te sub 2 sub Cl and Te sub 2 sub I, are also known. ref R. Kniep, D. Mootz, A. Rabenau Zur Kenntnis der Subhalogenide des Tellurs Zeitschrift f r anorganische und allgemeine Chemie 1976, Volume 422, pages 17 38. doi 10.1002 zaac.19764220103 ref The only other tellurium bromides are the yellow liquid Te sub 2 sub Br sub 2 sub and the orange solid tellurium tetrabromide TeBr sub 4 sub . ref name Xu Zhengtao Xu Recent Developments in Binary Halogen Chalcogen Compounds, Polyanions and Polycations in Handbook of Chalcogen Chemistry New Perspectives in Sulfur, Selenium and Tellurium, Francesco Devillanova, Editor, 2006, RSC. pp. 381 416. Royal Society DOI 10.1039 9781847557575 00455 ref References reflist Tellurium compounds Category Bromides Category Tellurium compounds Category Inorganic compound stubs Category Chalcohalides ar nl Telluurdibromide simple Te ... more details
Unreferenced stub auto yes date December 2009 Image Hawleyite 3D balls.png thumb right Cadmium sulfide In chemistry , metal chalcogenides are chemical compound compounds consisting of a metal and an element which is a member of the chalcogen column of the periodic table . While oxygen is a member of the chalcogens, so all metal oxide s are technically metal chalcogenides, the term is commonly used only to refer to compounds of a metal with sulfur , selenium or tellurium , and polonium . Important metal chalcogenides include the semiconductor cadmium sulfide , which is used in the production of photoresistor s, and cadmium selenide , which is used to produce quantum dots . DEFAULTSORT Metal Chalcogenide Category Inorganic compounds Inorganic compound stub hi ... more details
saved book title Periodic table groups subtitle cover image cover color Periodic table groups Overview Group periodic table Group Groups Alkali metal Alkaline earth metal Group 3 element Group 4 element Group 5 element Group 6 element Group 7 element Group 8 element Group 9 element Group 10 element Group 11 element Group 12 element Boron group Carbon group Nitrogen group Chalcogen Halogen Noble gas Other groups Iron group Platinum group Miscellany Collective names of groups of like elements Main group element Wikipedia books on elements ... more details
chembox verifiedrevid Name Tellurium iodide OtherNames Section1 Chembox Identifiers CASNo 12600 42 9 PubChem Section2 Chembox Properties Formula TeI MolarMass Appearance gray solid Density MeltingPt BoilingPt Section3 Chembox Structure CrystalStruct Soluble Solubility ? Magnetic susceptibility Section7 Chembox Hazards EUClass not listed Section8 Chembox Related OtherAnions ditellurium bromide OtherCations selenium monochloride OtherCpds tellurium tetraiodide Tellurium iodide is an inorganic compound with the formula Tellurium Te iodide I . Two forms are known. Their structures differ from the other monohalides of tellurium. There are three subhalide subiodide s of tellurium, TeI, TeI, and Te sub 2 sub I, and one tellurium tetraiodide . ref name Xu Preparation and properties TeI is a gray solid formed by the hydrothermal reaction of tellurium metal and iodine in hydroiodic acid . When this reaction is conducted near 270 C gives the TeI, which is triclinic. When the same mixture is heated to 150 C, one obtains the metastable monoclinic phase TeI. ref R. Kniep, D. Mootz, A. Rabenau Zur Kenntnis der Subhalogenide des Tellurs Zeitschrift f r anorganische und allgemeine Chemie 1976, Volume 422, pages 17 38. doi 10.1002 zaac.19764220103 ref The compounds are related structurally to Te sub 2 sub I see ditellurium bromide , but the additional iodide groups do not bridge to other Te centers. The corresponding monochloride and monobromide are molecular compounds with the formula Te sub 2 sub X sub 2 sub . ref name Xu Zhengtao Xu Recent Developments in Binary Halogen Chalcogen Compounds, Polyanions and Polycations in Handbook of Chalcogen Chemistry New Perspectives in Sulfur, Selenium and Tellurium, Francesco Devillanova, Editor, 2006, RSC. pp. 381 416. Royal Society DOI 10.1039 9781847557575 00455 ref References reflist Tellurium compounds Category Iodides Category Tellurium compounds Category Inorganic compound stubs Category Chalcohalides fa ... more details
In chemistry, subhalide usually refers to inorganic compound s where the halide metal ratio requires metal metal or element element for nonmetals bonding, sometimes extensively. Many compounds meet this definition. Examples Boron forms many subhalides, starting with B sub 2 sub X sub 4 sub , a representative member being diboron tetrafluoride . Aluminium forms a variety of subhalides. For gallium, adduct s of Ga sub 2 sub Cl sub 4 sub are known. Phosphorus subchlorides include P sub 4 sub Cl sub 2 sub and P sub 7 sub Cl sub 3 sub structurally related to P sub 7 sub sup 3 sup . For bismuth, the compound originally described as bismuth monochloride was later shown to consists of Bi sub 9 sub sup 5 sup clusters with chloride anions. ref Greenwood&Earnshaw2nd ref Telluriium subhalides are particularly extensive and include the following members Tritellurium dichloride Te sub 3 sub Cl sub 2 sub , Ditellurium bromide Te sub 2 sub X X Cl, Br, I , and two forms of tellurium monoiodide TeI . ref name Xu Zhengtao Xu Recent Developments in Binary Halogen Chalcogen Compounds, Polyanions and Polycations in Handbook of Chalcogen Chemistry New Perspectives in Sulfur, Selenium and Tellurium, Francesco Devillanova, Editor, 2006, RSC. pp. 381 416. Royal Society DOI 10.1039 9781847557575 00455 ref References references Category Inorganic compounds ... more details
A chalcogenide is a chemical compound consisting of at least one chalcogen ion and at least one more electropositive element. Although all group 16 element s of the periodic table are defined as chalcogens, the term is more commonly reserved for sulfide s, selenide s, and Telluride chemistry telluride s, rather than oxide s. photoconductivity Photoconductive chalcogenide glass es are used in xerography and television . Citation needed date December 2007 An optical processing chip using a chalcogenide as a photodetector has been developed by The University of Sydney with potential to speed up links between optical fibre networks and computers. ref http www.smh.com.au articles 2008 07 09 1215282927991.html Chip may speed up internet 100 times Deborah Smith for Sydney Morning Herald July 10, 2008 ref Examples Cadmium telluride Indium sulfide Zinc telluride Sodium selenide See also Phase change memory Chalcogen Negative resistance External links http scienceblog.com 45604 phase change memory based monetasystem points to the future of computer storage Phase change memory based moneta system points to the future of computer storage ScienceBlog Jun 03, 2011 http www.spacemart.com reports Tiny Chip Demonstrates Big Memory in Cosmos 999.html Tiny Chip Demonstrates Big Memory in Cosmos Michael P. Kleiman for Air Force Research Laboratory, Space Vehicles Directorate SpaceDaily Jul 27, 2006 http www.opticsinfobase.org abstract.cfm?URI oe 17 4 2182 Breakthrough switching speed with an all optical chalcogenide glass chip 640 Gbit s demultiplexing Michael Galili, Jing Xu, Hans C. Mulvad, Leif K. Oxenl we, Anders T. Clausen, Palle Jeppesen, Barry Luther Davis, Steve Madden, Andrei Rode, Duk Yong Choi, Mark Pelusi, Feng Luan, and Benjamin J. Eggleton Optics Express, Vol. 17, Issue 4, pp. 2182 2187 February 2, 2009 Maksym V. Kovalenko, Marcus Scheele, and Dmitri V. Talapin. Colloidal Nanocrystals with Molecular Metal Chalcogenide Surface Ligands . Science 324 12June2009 1417 1420 ... more details
chembox Verifiedfields changed verifiedrevid Name Tritellurium dichloride ImageFile ImageSize ImageName OtherNames Section1 Chembox Identifiers CASNo Ref cascite changed ?? CASNo 12526 08 8 Section2 Chembox Properties Formula Te sub 3 sub Cl sub 2 sub MolarMass 453.71 g mol Appearance Density MeltingPt BoilingPt Solubility Section3 Chembox Structure CrystalStruct Section7 Chembox Hazards EUClass not listed Tritellurium dichloride is the inorganic compound with the formula Tellurium Te sub 3 sub Chloride Cl sub 2 sub . It is one of the more stable lower chlorides of tellurium. Preparation and properties Te sub 3 sub Cl sub 2 sub is a gray solid. Its structure consists of a chain of Te atoms as in elemental Te , with every third Te center carrying two chloride ligands for the repeat uni Te Te TeCl sub 2 sub . ref Greenwood&Earnshaw2nd ref It is a semiconductor with a band gap of 1.52 eV, which is larger than that for elemental Te 0.34 eV . ref name Xu It is prepared by heating Te with the appropriate stoichiometry of chlorine. ref R. Kniep, D. Mootz, A. Rabenau Zur Kenntnis der Subhalogenide des Tellurs Zeitschrift f r anorganische und allgemeine Chemie 1976, Volume 422, pages 17 38. doi 10.1002 zaac.19764220103 ref Other lower tellurium chlorides Te sub 2 sub Cl sub 2 sub is a yellow liquid prepared by reaction of lithium polytellurides with TeCl sub 4 sub . Te sub 2 sub Cl, also a polymer, is a metastable gray solid, tending to convert to Te sub 3 sub Cl sub 2 sub and TeCl sub 4 sub . ref name Xu Zhengtao Xu Recent Developments in Binary Halogen Chalcogen Compounds, Polyanions and Polycations in Handbook of Chalcogen Chemistry New Perspectives in Sulfur, Selenium and Tellurium, Francesco Devillanova, Editor, 2006, RSC. pp. 381 416. Royal Society DOI 10.1039 9781847557575 00455 ref Being unstable with respect to disproportionation , tellurium dichloride has not been isolated as a solid, but has been characterised as the main component of the vapor formed with TeCl su ... more details
orphan date January 2010 A chalcogel or properly metal chalcogenide aerogel is an aerogel made from chalcogen s the column of elements on the periodic table beginning with oxygen such as sulfur and selenium, with cadmium, tellurium, platinum, and other elements. ref cite web title Heavy Metal Filter Made Largely from Air url http www.sciam.com article.cfm?chanId sa003&articleId 044B7489 E7F2 99DF 3433709C76B127DF date 2007 07 26 author Biello, David publisher Scientific American ref Research is ongoing, and metals less expensive than platinum have also been used in its creation. Chalcogels preferentially absorb heavy metals, ref S. Bag et al. http www.sciencemag.org cgi content full 317 5837 490 Porous Semiconducting Gels and Aerogels from Chalcogenide Clusters . Science 2007 07 27 Vol. 317. no. 5837, pp. 490 493, DOI 10.1126 science.1142535 ref showing promise in absorbing pollutants mercury, lead, and cadmium from water. ref Carmichael, Mary. http www.newsweek.com id 32528 First Prize for Weird A bizarre substance, like frozen smoke, may clean up rivers, run cell phones and power spaceships. Newsweek International, 2007 08 13. Retrieved on 2007 08 05. ref In addition, scientists have made one that is claimed to be twice as effective at desulfurization as any current methods. This is a very impressive feat, particularly because until the discovery of chalcogels properties, scientists were beginning to consider desulfurization an optimized process. ref cite web title New Sponge like Material Can Remove Mercury From Water, Separate Hydrogen From Other Gases And Pull Sulfur Out Of Crude Oil url http www.sciencedaily.com releases 2009 05 090517143341.htm date 2009 05 17 publisher ScienceDaily ref Semiconducting metal chalcogenide aerogels, first demonstrated by Professor Stephanie Brock at Wayne State University , show great promise for use in chemical sensors, solar cells, and photoelectrolysis of water. References Reflist External links http www.aerogel.org ?p 560 Detailed ... more details
See also Book Chemical elements sorted alphabetically Book Chemical elements sorted by number saved book title Periodic table subtitle cover image Periodic Table Armtuk3.svg cover color Periodic table Overview Periodic table History of the periodic table History Alternative periodic tables Alternatives Chemical element Element Isotope Atomic orbital Orbital Groups Group periodic table Group Alkali metal Group 1 alkali metals Alkaline earth metal Group 2 alkaline earth metals Group 3 element Group 3 Group 4 element Group 4 Group 5 element Group 5 Group 6 element Group 6 Group 7 element Group 7 Group 8 element Group 8 Group 9 element Group 9 Group 10 element Group 10 Group 11 element Group 11 Group 12 element Group 12 Boron group Group 13 boron group Carbon group Group 14 carbon group Nitrogen group Group 15 nitrogen group Chalcogen Group 16 chalcogens Halogen Group 17 halogens Noble gas Group 18 noble gases Periods Period periodic table Period Period 1 element Period 1 Period 2 element Period 2 Period 3 element Period 3 Period 4 element Period 4 Period 5 element Period 5 Period 6 element Period 6 Period 7 element Period 7 Extended periodic table Extensions Blocks Block periodic table Block s block p block d block f block Other divisions Transition metal Lanthanide Actinide Metal Metalloid Nonmetal Platinum group Noble metal Post transition metal Transuranium element Transactinide element See also Table of nuclides Island of stability Category Wikipedia books on the periodic table Category Wikipedia books on chemical elements Category Periodic table Wikipedia books on elements ... more details
The thiospinel group is a group of sulfide minerals with a general formula AB sub 2 sub X sub 4 sub where A is nominally a 2 metal, B is a 3 metal and X is 2 sulfide or similar anion selenide or telluride . Thio refers to sulfur and spinel indicates their Cubic crystal system isometric spinel like structure. ref name Mindat http www.mindat.org min 29230.html Thiospinel group on Mindat ref As the chalcogen s S, Se and Te are less Electronegativity electronegative than oxygen, the Chemical bonding bonding in these materials is generally more Covalent bond covalent than in the oxospinels. Some are Magnetism magnetic semiconductor s but others display, at times complicated, Metallic bond metallic behavior, often coupled with equally complicated magnetic properties. The assignment of oxidation state s is also not always as straightforward as in the more Ionic bond ionic oxocompounds, as is shown in the case of carrollite . Group members include Cadmoindite CdIn sub 2 sub S sub 4 sub Carrollite CuCo sub 2 sub S sub 4 sub Fletcherite Cu Ni,Co sub 2 sub S sub 4 sub Greigite Fe sup 2 sup Fe sup 3 sup sub 2 sub S sub 4 sub Indite FeIn sub 2 sub S sub 4 sub Kalininite ZnCr sub 2 sub S sub 4 sub Linnaeite Co sup 2 sup Co sub 2 sub sup 3 sup S sub 4 sub Polydymite Ni sup 2 sup Ni sub 2 sub sup 3 sup S sub 4 sub Siegenite Ni,Co sub 3 sub S sub 4 sub Tyrrellite Cu Co,Ni sub 2 sub Se sub 4 sub Violarite Fe sup 2 sup Ni sub 2 sub sup 3 sup S sub 4 sub References Reflist Category Thiospinel group sulfide mineral stub ... more details
Comproportionation or symproportionation is a chemical reaction where two reactants, each containing the same element but with a different oxidation number , will form a product with an oxidation number intermediate of the two reactants. For example, an element A in the oxidation states 0 and 2 can comproportionate to the state 1. It is opposite to disproportionation , where two or more atoms of the same element originally having the same oxidation state react with other chemical s or themselves to give different oxidation numbers. Frost diagrams main Frost diagram The tendency of two species to disproportionate can be determined by examining the Frost diagram of the oxidation states if a species value of G F is lower than the line joining the two oxidation numbers on either side of it, then it is more stable than a solution of these two species and they will undergo comproportionation. Examples In lead batteries, the spontaneous reaction is Pb s PbO sub 2 sub s 2 H sub 2 sub SO sub 4 sub aq 2 PbSO sub 4 sub s 2 H sub 2 sub O l Potassium permanganate contains manganese with oxidation number of 7 and reacts with a manganese compound having oxidation number 2 to yield manganese IV oxide manganese dioxide with oxidation number 4, potassium hydroxide and water. In chalcogen chemistry 15 Se SeCl sub 4 sub 4 AlCl sub 3 sub 2 Se sub 8 sub AlCl sub 4 sub sub 2 sub ref http www.chem.fsu.edu editors alabugin chemical reviews galley.pdf ref In volcanic eruptions, a redox reaction involving sulfur compounds occurs 2 H sub 2 sub S g SO sub 2 sub g 3 S s 2 H sub 2 sub O g In halogen chemistry IO sub 3 sub sup sup 5 I sup sup 6 H sup sup 3 I sub 2 sub 3 H sub 2 sub O References reflist Translated from German Wiki original Category Chemical reactions de Komproportionierung es Conmutaci n qu mica ru fr M diamutation zh ... more details
group 5 bismuth Bi 230 Nitrogen group group 5 Oxygen O 143 215 Chalcogen group 6 Sulfur S 181 255 Chalcogen group 6 Chromium Cr 192 group 6 Selenium Se 198 271 Chalcogen group 6 tellurium Te 205 Chalcogen ... more details
Orphan date February 2009 BLP sources date February 2008 Image Gedlion.jpg Professor Gerard Parkin right 150px Gerard Ged Parkin is a professor at the Columbia University . Biography Gerard Parkin worked under Malcolm Green chemist Malcolm Green during both his undergraduate and Postgraduate education graduate studies, at Queens College of Oxford University . His work involved exploring the chemistry of tungsten phosphine derivatives. He obtained a post doctoral position at the California Institute of Technology working with Professor John Bercaw on tungstenocene reactivity. In 1988, Ged joined the faculty at Columbia University, where he currently investigates a myriad of problems in main group and transition metal chemistry, including Calixarene complexes Retrodative bonding, especially related to boratrane s Group 6 reactivity relating to X H X H, C, O bond activation , hydrodesulfurization and hydrodenitrogenation The Tris mercaptoimidizole borate ligand Terminal chalcogen metal bonding Zinc Coordination complex complexes as models for biological systems Antimony alkoxide s and aryloxide s Bond cleavage Cleaving the mercury element mercury carbon Chemical bond bond . ref name Kalaugher cite web url http environmentalresearchweb.org cws article news 30668 title Working out mercury last Kalaugher first Liz date 27 July 2007 publisher Environmental Research Web accessdate 17 October 2010 ref Honors Parkin received the 2008 ACS Award in Organometallic Chemistry ref http portal.acs.org portal acs corg content? nfpb true& pageLabel PP ARTICLEMAIN&node id 1319&content id CTP 004542&use sec true&sec url var region1& uuid 34c8941d e5a1 4b51 a95d 8078c0ce3df9 ACS Award in Organometallic Chemistry , American Chemical Society . Accessed September 20, 2011 ref and the 1994 ACS Award in Pure Chemistry ref http portal.acs.org portal acs corg content? nfpb true& pageLabel PP ARTICLEMAIN&node id 1319&content id CTP 004546&use sec true&sec url var region1& uuid 751c67b2 4bde 44db ... more details
Gold chalcogenides are compounds formed between gold and one of the chalcogen s, elements from group 16 of the periodic table oxygen , sulfur , selenium , or tellurium . Gold III oxide , Au sub 2 sub O sub 3 sub . decomposes into gold and oxygen above 160 C., and dissolves in concentrated alkalis to form solutions which probably contain the Au OH sub 4 sub sup &minus sup ion Gold I sulfide , Au sub 2 sub S. formed by passing hydrogen sulfide through solutions of gold I compounds Gold III sulfide , Au sub 2 sub S sub 3 sub . unstable in the presence of water Gold tellurides Au sub 2 sub Te sub 3 sub , Au sub 3 sub Te sub 5 sub , and AuTe sub 2 sub approximate formul are known as non stoichiometric compound s. they show metallic conductivity . Au sub 3 sub Te sub 5 sub is a superconductor at very low temperatures. Natural gold tellurides, like calaverite AuTe sub 2 sub and sylvanite AgAuTe sub 4 sub , are minor ores of gold and tellurium . A gold sulfur bond is strong, not only involving inorganic sulfur ligands S sub x sub sup 2 sup but also thiolate s. Gold has a high electronegativity 2.4 on the Pauling scale ref cite book last Verne Biddle first Gregory Parker title Chemistry Precision and Design year 2000 publisher A Beka Academy, Inc. pages 472 ref It forms moderately strong bonds to sulfur 126 146 kJ mol . ref cite journal last1 Nuzzo first1 Ralph last2 Fusco first2 Florence last3 Allara first3 David year 2002 title Preparation and Properties of Solution Adsorbed Monolayers of Organic Disulfides on Gold Surfaces journal J. Am. Chem. Soc. volume 109 issue 8 pages 2358 2368 url http pubs.acs.org doi pdf 10.1021 ja00242a020 doi 10.1021 ja00242a020 ref This bond is widely employed to attach biological linkers, functional groups and other molecules to Colloidal gold nanoparticles for research purposes, especially live cell microscopic imaging that depend on gold s surface plasmon resonance . References references Greenwood&Earnshaw Category Gold compounds Category ... more details
compounds, on chalcogen halogen compounds and on transition metal oxo compounds which were supported ... development of boron chalcogen chemistry. Besides novel binary and ternary boron sulfur and boron ... more details
chembox verifiedrevid 444101648 ImageFileL1 Selenomethionine 2D skeletal.png ImageSizeL1 130px ImageNameL1 Selenomethionine chemical structure ImageFileR1 Selenomethionine from xtal 3D balls.png IUPACName 2 amino 4 methylselanyl butanoic acid OtherNames MSE Section1 Chembox Identifiers ChemSpiderID Ref chemspidercite correct chemspider ChemSpiderID 14375 InChI 1 C5H11NO2Se c1 9 3 2 4 6 5 7 8 h4H,2 3,6H2,1H3, H,7,8 InChIKey RJFAYQIBOAGBLC UHFFFAOYAT StdInChI Ref stdinchicite correct chemspider StdInChI 1S C5H11NO2Se c1 9 3 2 4 6 5 7 8 h4H,2 3,6H2,1H3, H,7,8 StdInChIKey Ref stdinchicite correct chemspider StdInChIKey RJFAYQIBOAGBLC UHFFFAOYSA N CASNo 3211 76 5 PubChem 15103 UNII Ref fdacite correct FDA UNII 964MRK2PEL ChEBI Ref ebicite correct EBI ChEBI 27585 SMILES C Se CCC C O O N Section2 Chembox Properties Formula C sub 5 sub H sub 11 sub NO sub 2 sub Se MolarMass 196.106 g mol Appearance Density MeltingPt BoilingPt Solubility Section3 Chembox Hazards MainHazards FlashPt Autoignition Selenomethionine is an amino acid containing selenium . The L enantiomer small L small enantiomer of selenomethionine, known as Se met and Sem, is a common natural food source of selenium . In vivo, selenomethionine is randomly incorporated instead of methionine and is readily oxidized. Its antioxidant activity arises from its ability to deplete reactive species. Selenium and sulfur are chalcogen s that share many chemical properties and the substitution of methionine to selenomethionine may have no effect on protein structure and function. However, the incorporation of selenomethionine into tissue proteins and keratin in horses causes alkali disease. Alkali disease is characterized by emaciation, loss of hair, deformation and shedding of hooves, loss of vitality and erosion of the joints of long bones. Incorporation of selenomethionine into proteins in place of methionine aids the structure elucidation of proteins by X ray crystallography using single wavelength anomalous dispersion ... more details
Collective names of groups of like elements is the term used by IUPAC to describe IUPAC nomenclature nomenclature for categorization of chemical element s. ref http www.iupac.org reports provisional abstract04 connelly 310804.html IUPAC Provisional Recommendations for the Nomenclature of Inorganic Chemistry 2004 online draft of an updated version of the Red Book IR 3 6.2 ref The following names are approved by IUPAC Alkali metal s The metals of group 1 Li, Na, K, Rb, Cs, Fr. Alkaline earth metal s The metals of group 2 Be, Mg, Ca, Sr, Ba, Ra. Pnictogen s The elements of group 15 N, P, As, Sb, Bi. Chalcogen s The elements of group 16 O, S, Se, Te, Po. Halogen s The elements of group 17 F, Cl, Br, I, At. Noble gas es The elements of group 18 He, Ne, Ar, Kr, Xe, Rn. Lanthanoid s Elements 57 71 La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu. Actinoid s Elements 89 103 Ac, Th, Pa, U, Np, Pu, Am, Cm, Bk, Cf, Es, Fm, Md, No, Lr. Rare earth element s Sc, Y, and the lanthanoids. Transition metal s Elements in groups 3 to 12. SITENAME uses the below hybrid system in its periodic table and chemical element related articles Same as the IUPAC system above for Alkali metals, Alkaline earth metals, Halogens, Noble gases, Lanthanoids, Actinoids, and Transition metals. Rare earth elements, Pnictogens and Chalcogens are not used. Leftover elements are grouped as Other metal s Metals that are not otherwise categorized Al, Ga, In, Sn, Tl, Pb, Bi Metalloid s B, Si, Ge, As, Sb, Te, Po Other non metal s Non metals that are not otherwise categorized H, C, N, O, P, S, Se Many other names for groups of elements are in common use, and yet others have been used throughout history. Some examples include Precious metal Variously defined group of non radioactive metals of high economical value Platinum group Ru, Rh, Pd, Os, Ir, Pt. Noble metal Variously defined group of metals that are generally resistant to corrosion. Usually includes Ag, Au, and the platinum group metals. Heavy meta ... more details
Pnictogen 15 Chalcogen 16 Halogen 17 Noble gas 18 br Name bgcolor FF6666 3 br Lithium Li bgcolor ... 13 Carbon group 14 Nitrogen group 15 also Pnictogen 15 Chalcogen 16 Halogen 17 Noble gas 18 br Name ... Group 12 element 12 Boron group 13 Carbon group 14 Nitrogen group 15 also Pnictogen 15 Chalcogen 16 ... 11 Group 12 element 12 Boron group 13 Carbon group 14 Nitrogen group 15 also Pnictogen 15 Chalcogen ... Chalcogen 16 Halogen 17 Noble gas 18 br Name bgcolor FF6666 55 br Caesium Cs bgcolor FFDEAD 56 br Barium ... group 15 also Pnictogen 15 Chalcogen 16 Halogen 17 Group 18 element 18 br Name bgcolor FF6666 87 br ... more details
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