chembox verifiedrevid 443547917 Name Cyclobutadiene ImageFileL1 Cyclobutadiene structure.svg ImageSizeL1 100px ImageNameL1 Cyclobutadiene ImageFileR1 Cyclobutadiene3D.png ImageSizeR1 120px IUPACName 1,3 Cyclobutadiene OtherNames Cyclobutadiene br 4 Annulene Section1 Chembox Identifiers ChemSpiderID Ref ... g mol Density MeltingPt BoilingPt Cyclobutadiene is the smallest n annulene 4 annulene , an extremely ... twice an odd number . Some cyclobutadiene metal compounds are stable, thought to be caused by the metal ... state is caused by the Jahn Teller Effect ref name Senn . Tetra t butyl substituted cyclobutadiene ... name Irngartinger The pi electron energy of cyclobutadiene is higher than that of its open chain counterpart ... studies Citation needed date February 2012 on cyclobutadiene show that it has a rectangular structure as opposed to a square structure and two different 1,2 dideuterio 1,3 cyclobutadiene stereoisomers ... . However it is far from stable, it is highly reactive and has a very short lifetime. Cyclobutadiene ... could not isolate it. Cyclobutadiene can be generated through degradation from a cyclobutadiene metal ... ref name henery Cyclobutadiene when liberated from the iron complex reacts with electron deficient alkyne s to a Dewar benzene ref name pettit Image Cyclobutadiene DewarbenzeneConversion.png 600px Cyclobutadiene to Dewarbenzene conversion The Dewar benzene converts to dimethyl phthalate on heating at 90 C. One cyclobutadiene derivative is also accessible through a 2 2 cycloaddition of a di alkyne ... 2006 See also Cyclobutene Butadiene References Reflist refs ref name Cram2003 The Taming of Cyclobutadiene ... pdf ref ref name emerson Cyclobutadiene and Benzocyclobutadiene Iron Tricarbonyl Complexes ... 4 1,3 cyclobutadiene R. Pettit and J. Henery Organic Syntheses , Coll. Vol. 6, p.310 1988 Vol ... pdf DOI 10.1002 anie.198002111 ref ref name Kollmer A theoretical study of the structure of cyclobutadiene ... pettit Cyclobutadiene L. Watts, J. D. Fitzpatrick, R. Pettit J. Am. Chem. Soc. 1965 87 14 3253 3254 ... more details
DISPLAYTITLE C sub 4 sub H sub 4 sub The molecular formula C sub 4 sub H sub 4 sub may refer to Cyclobutadiene Cyclobutyne Methylenecyclopropene Tetrahedrane Vinylacetylene Butatriene MolFormDisambig fr C4H4 nl C4H4 zh C4H4 sr C4H4 ... more details
In chemistry , a chemical trap is a chemical compound that is used to detect a certain molecule ref JerryMarch ref when The concentration of this molecule is very small and below detection limit The molecule is very reactive for example cyclobutadiene and it is not possible to isolate or detect it by spectroscopy spectroscopic means The molecule is an enantiomer present in a racemate . With the reaction product of the chemical trap and the molecule in question it is possible to Quantify the amount Prove the existence of the molecule References Reflist Category Analytical chemistry it Trappola chimica ... more details
File Benzene bonds.svg right thumb Benzene 6 annulene . File 14 Annulene.svg right thumb Cyclotetradecaheptaene 14 annulene . File 18 Annulene.svg right thumb Cyclooctadecanonaene 18 annulene . Annulenes are completely Conjugated system conjugated Cyclic compound monocyclic hydrocarbon s. They have the general formula C sub n sub H sub n sub when n is an even number or C sub n sub H sub n 1 sub when n is an odd number . The IUPAC nomenclature IUPAC naming conventions are that annulenes with 7 or more carbon atoms are named as n annulene, where n is the number of carbon atom s in their ring, ref GoldBookRef title annulene file A00368 ref though sometimes the smaller annulenes are referred to using the same notation, and benzene is sometimes referred to simply as annulene. ref Ege, S. 1994 Organic Chemistry Structure and Reactivity 3rd ed. D.C. Heath and Company ref ref Dublin City University http www.dcu.ie chemist pratt annulene annulene.htm Annulenes ref The first three annulenes are cyclobutadiene , benzene , and cyclooctatetraene 8 annulene . Some annulenes, namely cyclobutadiene, cyclodecapentaene or 10 annulene, cyclododecahexaene or 12 annulene and cyclotetradecaheptaene 14 annulene , are unstable, with cyclobutadiene extremely so. Annulenes may be aromatic benzene, 14 annulene, cyclooctadecanonaene or 18 annulene , non aromatic 10 annulene , or anti aromatic cyclobutadiene . Only cyclobutadiene and benzene are fully Plane geometry planar , though 14 and 18 annulene with all trans double bonds placing the hydrogens inside the ring can achieve the planar conformation needed for aromaticity, with 14 and 18 annulene following H ckel s rule with 4n 2 Pi bond electrons . 14 annulene does exhibit some ring strain due to steric hindrance . Many of the larger annulenes, 18 annuelene for example, are large enough to minimize the van der Waals strain of internal hydrogens and thermodynamically qualify as aromatic. However, none of the larger annulenes are as stable as ... more details
Chembox verifiedrevid 459537872 ImageFile Benzocyclobutene.svg ImageSize ImageAlt IUPACName Bicyclo 4.2.0 octa 1,3,5,7 tetraene OtherNames Section1 Chembox Identifiers CASNo Ref cascite correct ?? CASNo 4026 23 7 SMILES C12 CC CC C1C C2 PubChem 77987 ChemSpiderID Ref chemspidercite correct chemspider ChemSpiderID 70373 InChI 1 C8H6 c1 2 4 8 6 5 7 8 3 1 h1 6H InChIKey WHEATZOONURNGF UHFFFAOYAK StdInChI Ref stdinchicite correct chemspider StdInChI 1S C8H6 c1 2 4 8 6 5 7 8 3 1 h1 6H StdInChIKey Ref stdinchicite correct chemspider StdInChIKey WHEATZOONURNGF UHFFFAOYSA N Section2 Chembox Properties C 8 H 6 Appearance Density MeltingPt BoilingPt Solubility Section3 Chembox Hazards MainHazards FlashPt Autoignition Benzocyclobutadiene is the simplest polycyclic aromatic hydrocarbon , being composed of a benzene ring fused to a cyclobutadiene ring. It has chemical formula carbon sub 8 sub hydrogen sub 6 sub . Though the benzene ring is stabilized by aromaticity , the cyclobutadiene portion has a destabilizing effect. For this reason, benzocyclobutadiene will readily Dimer chemistry dimerize or polymerize and it reacts as a dienophile in Diels Alder reaction s. ref Carey, Francis A. Sundberg, Richard J. 1984 . Advanced Organic Chemistry Part A Structure and Mechanisms 2nd ed. . New York N.Y. Plenum Press. ISBN 0 306 41198 9. ref See also Pentalene References reflist Category Polycyclic aromatic hydrocarbons ar el fr Benzocyclobutadi ne it Benzociclobutadiene ... more details
Unreferenced stub auto yes date December 2009 Chembox verifiedrevid 381669985 ImageFile Methylenecyclopropene.svg ImageSize 100px IUPACName 3 methylenecyclopropene OtherNames Section1 Chembox Identifiers CASNo 4095 06 1 PubChem 138112 SMILES C C1C C1 Section2 Chembox Properties C 4 H 4 Appearance Density MeltingPt BoilingPt Solubility Section3 Chembox Hazards MainHazards FlashPt Autoignition 3 Methylenecyclopropene is a hydrocarbon with chemical formula Carbon sub 4 sub Hydrogen sub 4 sub and CAS number 4095 06 1. It Dimer chemistry dimer izes or polymer izes readily, but is more stable than cyclobutadiene . See also Cyclopropene Cyclopropane Methylene Category Hydrocarbons Hydrocarbon stub fa hu Metil ncikloprop n nl Methyleencyclopropeen ... more details
chembox verifiedrevid 414303387 ImageFile Azete structure.svg ImageSize 80px IUPACName OtherNames Section1 Chembox Identifiers CASNo 287 24 1 PubChem 20185374 SMILES C1 CN C1 ChemSpiderID 14804701 InChI 1 C3H3N c1 2 4 3 1 h1 3H InChIKey LKSPYOVNNMPMIZ UHFFFAOYAS StdInChI 1S C3H3N c1 2 4 3 1 h1 3H StdInChIKey LKSPYOVNNMPMIZ UHFFFAOYSA N Section2 Chembox Properties Formula C sub 3 sub H sub 3 sub N MolarMass 53.06262 Appearance Density MeltingPt BoilingPt Solubility Section3 Chembox Hazards MainHazards FlashPt Autoignition Azete is a heterocycle heterocyclic chemical compound consisting of an saturation chemistry unsaturated four membered ring with three carbon atoms and one nitrogen atom. See also Azetidine , the saturated analog Cyclobutadiene , the carbocyclic analog heterocyclic stub Category Nitrogen heterocycles de Azete it Azete nl Azeet pl Azet zwi zek chemiczny ... more details
File Carceplex.png frame border right text top alt Image of calix 4 arene carceplex Image of calix 4 arene carceplex A carceplex is a class of chemical structures in the carcerand family that are hinge d, and can be closed using reagents that react with the carceplex and trap precursors of reactive intermediates, ref name Cram and are unreactive with the trapped precursor or reactive intermediate. This is useful for determining the spectroscopic and crystallographic properties of reactive intermediates in relative isolation, particularly compounds prone to dimerization like cyclobutadiene . References Reflist refs ref name Cram cite book last Cram first Donald et al title Container molecules and their guests year 1997 publisher Royal Society of Chemistry location Cambridge, UK isbn 0 85404 507 4 url http books.google.com books?id RqE5GlYTG1cC&lpg PA22&ots UY6m9tQB6r&dq carceplex 20inventor&pg PP1 v onepage&q&f false ref Category Supramolecular chemistry ... more details
Chembox Watchedfields changed verifiedrevid 416385697 ImageFile Cyclobutadienyl iron tricarbonyl from xtal 3D balls.png ImageSize ImageAlt IUPACName PIN OtherNames Section1 Chembox Identifiers CASNo Ref cascite correct ?? CASNo PubChem SMILES Section2 Chembox Properties Formula C sub 4 sub H sub 4 sub Fe CO sub 3 sub Appearance Density MeltingPt BoilingPt Solubility Section3 Chembox Hazards MainHazards FlashPt Autoignition Cyclobutadieneiron tricarbonyl or C sub 4 sub H sub 4 sub Fe CO sub 3 sub is an organometallic complex of cyclobutadiene and an iron metal carbonyl . The chemical compound is used in organic chemistry as a precursor for cyclobutadiene. Preparation It was first prepared in 1965 by Rowland Pettit starting from cyclooctatetraene ref Cyclobutadiene and Benzocyclobutadiene Iron Tricarbonyl Complexes G. F. Emerson, L. Watts, R. Pettit J. Am. Chem. Soc. 1965 87 1 131 133. http pubs.acs.org cgi bin abstract.cgi jacsat 1965 87 i01 f pdf f ja01079a032.pdf First Page ref ref Cis dichlorocyclobutene , Organic Syntheses , Coll. Vol. 6, p.422 1988 Vol. 50, p.36 1970 http www.orgsyn.org orgsyn prep.asp?prep cv6p0422 Article . ref ref Iron, tricarbonyl 4 1,3 cyclobutadiene R. Pettit and J. Henery Organic Syntheses , Coll. Vol. 6, p.310 1988 Vol. 50, p.21 1970 http www.orgsyn.org orgsyn orgsyn prepContent.asp?prep cv6p0310 Link ref Image CyclobutadieneirontricarbonylSynthesis.png 600px Cyclobutadieneiron tricarbonyl Synthesis Cyclooctatetraene is chlorinated to the 4.2.0 bicyclic compound which reacts further with the alkyne dimethyl acetylenedicarboxylate in a Diels Alder reaction followed by a reverse DA reaction by pyrolysis at 200 C releasing cis dichlorocyclobutene. This compound reacts with di iron nonacarbonyl obtained from photolysis of iron pentacarbonyl to Cyclobutadieneiron tricarbonyl. Properties Cyclobutadieneiron tricarbonyl displays aromaticity as evidenced by some of its reactions which can be classified as electrophilic aromatic substitution ref ... more details
Pauson Khand reaction Kent 1995.svg center PK reaction with molybdenum hexacarbonyl Cyclobutadiene also ... in situ from decomplexation of stable cyclobutadiene iron tricarbonyl with CAN chemistry CAN . ref Intramolecular nowiki nowiki 2 2 1 nowiki nowiki Cycloadditions with Cyclobutadiene tricarbonyliron ... more details
Other uses of push pull Push pull disambiguation A push pull olefin is a type of olefin characterized by an polar effect electron withdrawing substituent on one side of the double bond and an electron donating substituent on the other side. This makes the pi bond very polarizability polarized . The rotational barrier for a push pull olefin is lower than that of an ordinary olefin and this makes it an interesting candidate for a molecular switch for instance azobenzene s. A push pull configuration also helps to stabilize the double bond because the carbon carbon bond has considerably less double bond character. For instance cyclobutadiene is a very unstable molecule but with both olefinic bonds in push pull configuration two ester substituents and two tertiary amine substituents the molecule is stable indeed. References Ethyl 2 cyano 3 ethoxyacryloyl carbamate irreversible thermal isomerization of a push pull olefin Kuangsen Sung, Ming Chi Lin, Pin Mei Huang, Bo Ren Zhuang, Robert Sung,Ru Rong Wu Arkivoc 2005 p. 131 http arkat usa.org ark journal 2005 I13 General 1380 05 1380D.asp open access publishing open access publication See also Leimgruber Batcho indole synthesis Application of push pull olefins in molecular logic gate s Category Alkenes pt Olefina push pull ... more details
chembox verifiedrevid 443546612 ImageFileL1 Cyclobutene.svg ImageSizeL1 ImageFileR1 Cyclobutene3D.png ImageSizeR1 IUPACName Cyclobutene OtherNames Section1 Chembox Identifiers ChemSpiderID Ref chemspidercite correct chemspider ChemSpiderID 63164 InChIKey CFBGXYDUODCMNS UHFFFAOYAN StdInChI Ref stdinchicite correct chemspider StdInChI 1S C4H6 c1 2 4 3 1 h1 2H,3 4H2 StdInChIKey Ref stdinchicite correct chemspider StdInChIKey CFBGXYDUODCMNS UHFFFAOYSA N CASNo 822 35 5 EINECS 212 496 8 PubChem 69972 ChEBI Ref ebicite correct EBI ChEBI 51206 SMILES C 1 C CC 1 InChI 1 C4H6 c1 2 4 3 1 h1 2H,3 4H2 Section2 Chembox Properties Formula C sub 4 sub H sub 6 sub MolarMass 54.09 g mol Appearance Density 0.733 g cm sup 3 sup MeltingPt BoilingPt 2 C Solubility Section3 Chembox Hazards MainHazards FlashPt Autoignition Cyclobutene is a cycloalkene . It is used in the chemical industry as a monomer for synthesis of some polymer s and for a range of chemical syntheses. See also Cyclobutane Cyclobutadiene Cyclobutyne Squaric acid External links http www.orgsyn.org orgsyn prep.asp?prep cv7p0117 Preparation of cyclobutene cycloalkenes Category Cycloalkenes Category Monomers hydrocarbon stub ar ca Ciclobut de Cyclobuten es Ciclobuteno fa fr Cyclobut ne it Ciclobutene hu Ciklobut n nl Cyclobuteen ja pt Ciclobuteno sr Ciklobuten zh ... more details
chembox Verifiedfields changed verifiedrevid 477372799 Name Biphenylene ImageFile Diphenylene.png ImageName Diphenylene ImageFile1 Biphenylene from xtal 3D vdW.png ImageSize1 150px ImageName1 Diphnylene 3D IUPACName Biphenylene OtherNames Diphenylene Section1 Chembox Identifiers CASNo Ref cascite changed ?? CASNo 259 79 0 ChEBI Ref ebicite correct EBI ChEBI 33079 PubChem 9214 ChemSpiderID Ref chemspidercite correct chemspider ChemSpiderID 8859 SMILES c1ccc 2c c1 c3c2cccc3 InChI 1 C12H8 c1 2 6 10 9 5 1 11 7 3 4 8 12 10 11 h1 8H InChIKey IFVTZJHWGZSXFD UHFFFAOYAR StdInChI Ref stdinchicite correct chemspider StdInChI 1S C12H8 c1 2 6 10 9 5 1 11 7 3 4 8 12 10 11 h1 8H StdInChIKey Ref stdinchicite correct chemspider StdInChIKey IFVTZJHWGZSXFD UHFFFAOYSA N Section2 Chembox Properties Formula C sub 12 sub H sub 8 sub MolarMass 152.19 g mol Appearance solid Density Solubility MeltingPt 109 111 C Section7 Chembox Hazards Autoignition ExternalMSDS MainHazards FlashPt Section8 Chembox Related Function unsaturated hydrocarbon unsaturated br hydrocarbons OtherFunctn benzene br cyclobutene br cyclobutadiene Biphenylene is a compound composed of two aryl rings fused together to form a 6 4 6 arene system. The structure appears to be planar, which is concerted by its antiaromaticity . ref cite journal authorlink Jurg Waser and Chia Si Lu title The Crystal Structure of Biphenylene journal J. Am. Chem. Soc volume 66 doi 10.1021 ja01240a012 pages 2035 2042 date 1944 author Waser, Jurg last2 Lu first2 Chia Si issue 12 ref Biphenylene is probably best known as the dimer of benzyne , which serves as one synthetic route. References Reflist Category Antiaromatic compounds Category Hydrocarbons ar el fa ... more details
Costin D. Neni escu IPA ro kos tin neni t sesku July 15, 1902 &ndash July 28, 1970 was a prominent Romania n chemist , and a professor at the Polytechnic University of Bucharest . He was a member of the Romanian Academy , a corresponding member of the German Academy of Sciences Berlin German Academy of Sciences in Berlin , and a member of the German Academy of Sciences Leopoldina Leopoldina Academy of Natural Scientists in Halle, Saxony Anhalt Halle Saale . After completing in 1920 his secondary studies at Gheorghe Laz r National College Bucharest Gheorghe Laz r High School , Neni escu continued his studies at the ETH Zurich Polytechnic Institute in Z rich and Ludwig Maximilians University of Munich Ludwig Maximilians University in Munich , where he was one of the favorite students of Hans Fischer . ref Ro icon http www.tsocm.pub.ro revistachimia Personalitati 01 20c d nenitescu.htm Costin D. Neni escu creatorul colii rom ne ti de chimie organic Costin Neni escu the Founder of the Romanian Organic Chemistry School , by Prof. Dr. Sorin Ro ca, Revista Chimia , accessed on April 17, 2007 ref He studied Friedel Crafts like reactions in the series of aliphatic hydrocarbons, the mechanism of the isomerization of cyclobasics, the halogen migration in cycles and chains, reactions induced by carbonium ions, and others. He identified a group of naphthenic acid s in Romanian crude oil . He searched for ways of obtaining cyclobutadiene , while explaining the chemistry of this unstable substance and isolating its dimers. His research interests were also in the oxidation of open chain and aromatic hydrocarbons with chromic acid and chromic oxychloride . He found new methods for the synthesis of pirilium salts, of carbene s, triptamine , serotonine , two new syntheses for the indole nucleus, and a new method of polymerisation of ethylene . His research was substantiated in more than 200 papers. His remarkable technical and scientific activity helped develop the chemical industry ... more details
S0040 4039 01 84500 7 title Tert. butyl substituierte cyclobutadiene und cyclopentadienone year 1972 ... temperature decomposition to the cyclobutadiene starts, the trimethylsilyl tetrahedrane melts at a much ... more details
&minus 2.2 Pentalene 18.1 Heptalene 22.7 Cyclobutadiene 27.6 Numerous attempts have been made to quantify ... , borazine &minus 1.7 and cyclohexane 1.1 are not aromatic and cyclobutadiene 18 is antiaromatic ... more details
Pyramidal alkenes are alkene s in which the two carbon atom s making up the double bond are not coplanar with their four substituent s Ref . This deformation from a trigonal planar geometry to a tetrahedral molecular geometry is the result of angle strain induced in the molecule due to geometric constraints. Pyramidal alkenes only exist in the laboratory but are of interest because much can be learned from them about the nature of chemical bond ing. ref Chemistry of pyramidalized alkenes Santiago V zquez, and Pelayo Camps Tetrahedron Volume 61, Issue 22, 30 May 2005 , Pages 5147 5208 DOI 10.1016 j.tet.2005.03.055 ref In cycloheptene 1.1 the cis isomer is an ordinary unstrained molecule but the heptane ring is too small to accommodate a trans configured alkene group resulting in strain and twisting of the double bond. The p orbital misalignment is minimized by a degree of pyramidalization . In the related anti bredt molecule s it is not pyrimidalization but twisting that dominates. Image Cagealkenes.png center 300px Fig. 1 Pyramidal alkenes Pyramidalized cage alkenes also exist where symmetrical bending of the substituents predominates without p orbital misalignment. Image Anglestraindefinition.png center 400px Fig. 2 Angle definitions The pyramidalization angle math phi math b is defined as the angle between the plane defined by one of the doubly bonded carbons and its two substituents and the extension of the double bond and is calculated as math cos phi cos R C C cos 1 2 R C R math the butterfly bending angle or folding angle math psi math c is defined as the angle between two planes and can be obtained by averaging the two torsional angle s R1C CR3 and R2C CR4. In alkenes 1.2 and 1.3 these angles are determined with x ray crystallography as respectively 32.4 22.7 and 27.3 35.6 . Although stable, these alkenes are very reactive compared to ordinary alkenes. They are liable to dimerization to cyclobutadiene compounds or react with oxygen to epoxide s. The compound ... more details
and cyclooctadiene , but even cyclobutadiene can be stabilized. In the complex with butadiene , the diene ... compounds with upon reaction with iron carbonyls. These include cyclobutadiene derivatives, ferroles of the formula Fe sub 2 sub C sub 4 sub R sub 4 sub CO sub 6 sub , as well as cyclopentadienone and cyclobutadiene ... more details
expert subject 1 Chemistry date October 2011 Image Antiaromats2.png 300px right Antiaromatic compounds Antiaromatic molecule s are Cyclic compound cyclic systems containing alternating single and double bond s, where the pi electron energy of antiaromatic compounds is higher than that of its open chain counterpart. Therefore antiaromatic compounds are unstable and highly reactive often antiaromatic compounds distort themselves out of planarity to resolve this instability. Antiaromatic compounds usually fail H ckel s rule of aromatic ity. The basic reason why anti aromatic compounds are so unstable is explained by the molecular orbital theory. According to this theory when anti aromatic compounds are formed then always 2 electrons remain in the non bonding orbitals. Now as non bonding molecular orbitals are unstable compared to atomic pi orbitals hence these compounds are highly unstable. This is also one of the major differences between aromatic and anti aromatic compounds that in the formation of aromatic compounds all the electrons go only in the bonding molecular orbitals and thus imparting a lot of stability to the compound. Examples of antiaromatic systems are cyclobutadiene A , the cyclopentadienyl cation B and the cyclopropenyl anion C . Cyclooctatetraene is a 4n system but neither aromatic or antiaromatic because the molecule escapes a planar geometry. By adding or removing an electron pair via a redox reaction, a system can become aromatic and therefore more stable than the original non or anti aromatic compound, for instance the cyclooctatetraenide dianion . The IUPAC criteria for antiaromaticity are as follows ref Compendium of Chemical Terminology , http goldbook.iupac.org A00382.html antiaromatic compounds , accessed 1 Feb 2007. ref The molecule must have 4 n electrons where n is any integer. The molecule must be cyclic. The molecule must have a conjugated pi electron system. The molecule must be planar. However, most chemists agree on the definitio ... more details
chembox verifiedrevid 439048895 Name Cyclobutane ImageFile Cyclobutane2.svg ImageSize 100px ImageFileL1 Cyclobutane buckled 3D balls.png ImageSizeL1 100px ImageNameL1 Cyclobutane ImageFileR1 Cyclobutane buckled 3D vdW.png ImageSizeR1 100px ImageNameR1 Cyclobutane IUPACName cyclobutane Section1 Chembox Identifiers CASNo Ref cascite correct ?? CASNo 00287 23 0 SMILES C1CCC1 Section2 Chembox Properties Formula C sub 4 sub H sub 8 MolarMass 56.107 g mol MeltingPtC 91 BoilingPtC 12.5 Density 0.720 g cm sup 3 sup Section8 Chembox Related OtherAnions OtherCations OtherFunctn Butane Function alkane OtherCpds Cyclobutene Cyclobutadiene Cyclobutane is an organic compound with the formula CH sub 2 sub sub 4 sub . Cyclobutane is a colourless gas and commercially available as a liquefied gas . Derivatives of cyclobutane are called cyclobutanes. Cyclobutane itself is of no commercial or biological significance, but more complex derivatives are important in biology and biotechnology. Structure The bond angles between carbon atom s are significantly angle strain strained and as such have lower bond energy bond energies than related linear or unstrained hydrocarbons, e.g. butane or cyclohexane . As such, cyclobutane is unstable above about 500 C. The four carbon atoms in cyclobutane are not coplanar, instead the ring typically adopts a folded or puckered chemical conformation conformation . ref http www.britannica.com EBchecked topic 148015 cyclobutane chemical compound Cycloalkanes Britannica Online Encyclopedia Bot generated title ref One of the carbon atoms makes a 25 angle with the plane formed by the other three carbons. In this way some of the Eclipsed conformation eclipsing interactions are reduced. The conformation is also known as a butterfly . Equivalent puckered conformations interconvert File CyclobutaneConf2.png 330px Cyclobutanes in biology and biotechnology File PentacycloanammoxicAcid.png 300px Pentacycloanammoxic acid Despite inherent strain the cyclobutane motif is ... more details
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