DBpedia – Linked Data Fragments

Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Cyclobutadiene> ?p ?o }

• Cyclobutadiene abstract "Cyclobutadiene is the smallest [n]-annulene ([4]-annulene), an extremely unstable hydrocarbon having a lifetime shorter than five seconds in the free state. It has chemical formula C4H4. It is believed to be in equilibrium between a pair of rectangular/nonplanar ground states and a square, excited triplet state based upon theoretical calculations, and through spectroscopic and crystallographic investigation of substituted cyclobutadienes, in an argon matrix and inside carceplexes. Though it has alternating single and double bonds, it is predicted triplet, unstable and antiaromatic by Hückel's rule, because its ring has 4 π-electrons, and 4 is not twice an odd number. Some cyclobutadiene–metal compounds are stable, thought to be caused by the metal atom providing 2 more electrons to the system. Planar, rectangular distortion to a singlet ground state is caused by the Jahn–Teller effect. Tetra-t-butyl substituted cyclobutadiene is sufficiently stable to gather x-ray crystallographic images of the structure which has a distorted, nonplanar configuration and double bond lengths longer than normal (1.464 vs expected 1.34)The pi electron energy of cyclobutadiene is higher than that of its open-chain counterpart, 1,3-butadiene, and it is therefore said to be anti-aromatic rather than aromatic. The electronic states of cyclobutadiene have been explored with a variety of computational methods. The singlet ground state has a rectangular structure. The first excited state is a triplet with a square geometry. The rectangular structure is consistent with the existence of two different 1,2-dideuterio-1,3-cyclobutadiene stereoisomers. This indicates that the pi electrons are localized and therefore not considered to be aromatic. Cyclobutadiene is far from stable, it is highly reactive and has a very short lifetime. Cyclobutadiene dimerizes by a Diels-Alder reaction at 35 K. The monomeric form has been studied at higher temperatures by trapping with matrix isolation in a noble gas.".
• Cyclobutadiene iupacName "1,3-Cyclobutadiene".
• Cyclobutadiene thumbnail Cyclobutadiene_structure.svg?width=300.
• Cyclobutadiene wikiPageID "843920".
• Cyclobutadiene wikiPageLength "7567".
• Cyclobutadiene wikiPageOutDegree "38".
• Cyclobutadiene wikiPageRevisionID "647081775".
• Cyclobutadiene wikiPageWikiLink 1,3-Butadiene.
• Cyclobutadiene wikiPageWikiLink Alkyne.
• Cyclobutadiene wikiPageWikiLink Annulene.
• Cyclobutadiene wikiPageWikiLink Antiaromaticity.
• Cyclobutadiene wikiPageWikiLink Aromaticity.
• Cyclobutadiene wikiPageWikiLink Carbon_monoxide.
• Cyclobutadiene wikiPageWikiLink Carceplex.
• Cyclobutadiene wikiPageWikiLink Category:Annulenes.
• Cyclobutadiene wikiPageWikiLink Category:Antiaromatic_compounds.
• Cyclobutadiene wikiPageWikiLink Ceric_ammonium_nitrate.
• Cyclobutadiene wikiPageWikiLink Chemical_formula.
• Cyclobutadiene wikiPageWikiLink Chemical_trap.
• Cyclobutadiene wikiPageWikiLink Covalent_bond.
• Cyclobutadiene wikiPageWikiLink Cycloaddition.
• Cyclobutadiene wikiPageWikiLink Cyclobutadieneiron_tricarbonyl.
• Cyclobutadiene wikiPageWikiLink Cyclobutene.
• Cyclobutadiene wikiPageWikiLink Cyclooctatetraene.
• Cyclobutadiene wikiPageWikiLink Dehydrohalogenation.
• Cyclobutadiene wikiPageWikiLink Dewar_benzene.
• Cyclobutadiene wikiPageWikiLink Diels–Alder_reaction.
• Cyclobutadiene wikiPageWikiLink Dimer_(chemistry).
• Cyclobutadiene wikiPageWikiLink Dimethyl_phthalate.
• Cyclobutadiene wikiPageWikiLink Hxc3xbcckels_rule.
• Cyclobutadiene wikiPageWikiLink Hydrocarbon.
• Cyclobutadiene wikiPageWikiLink Jahn–Teller_effect.
• Cyclobutadiene wikiPageWikiLink Matrix_isolation.
• Cyclobutadiene wikiPageWikiLink Metal.
• Cyclobutadiene wikiPageWikiLink Noble_gas.
• Cyclobutadiene wikiPageWikiLink Pi_bond.
• Cyclobutadiene wikiPageWikiLink Singly_and_doubly_even.
• Cyclobutadiene wikiPageWikiLink University_of_Texas_at_Austin.
• Cyclobutadiene wikiPageWikiLink File:CyclobutadienSynthDessyWhite.png.
• Cyclobutadiene wikiPageWikiLink File:Cyclobutadiene-DewarbenzeneConversion.png.
• Cyclobutadiene wikiPageWikiLinkText "Cyclobutadiene".
• Cyclobutadiene wikiPageWikiLinkText "cyclobutadiene".
• Cyclobutadiene imagefilel "Cyclobutadiene structure.svg".
• Cyclobutadiene imagefiler "Cyclobutadiene3D.png".
• Cyclobutadiene imagenamel "Cyclobutadiene".
• Cyclobutadiene imagesizel "100".
• Cyclobutadiene imagesizer "120".
• Cyclobutadiene iupacname "13".
• Cyclobutadiene name "Cyclobutadiene".
• Cyclobutadiene othernames "Cyclobutadiene".
• Cyclobutadiene othernames "[4]Annulene".
• Cyclobutadiene verifiedrevid "443547917".
• Cyclobutadiene wikiPageUsesTemplate Template:Annulenes.
• Cyclobutadiene wikiPageUsesTemplate Template:Carbon.
• Cyclobutadiene wikiPageUsesTemplate Template:Cascite.
• Cyclobutadiene wikiPageUsesTemplate Template:Chembox.
• Cyclobutadiene wikiPageUsesTemplate Template:Chembox_Identifiers.
• Cyclobutadiene wikiPageUsesTemplate Template:Chembox_Properties.
• Cyclobutadiene wikiPageUsesTemplate Template:Chemspidercite.
• Cyclobutadiene wikiPageUsesTemplate Template:Citation_needed.
• Cyclobutadiene wikiPageUsesTemplate Template:Cycloalkenes.
• Cyclobutadiene wikiPageUsesTemplate Template:Ebicite.
• Cyclobutadiene wikiPageUsesTemplate Template:Hydrogen.
• Cyclobutadiene wikiPageUsesTemplate Template:Iron.
• Cyclobutadiene wikiPageUsesTemplate Template:Oxygen.
• Cyclobutadiene wikiPageUsesTemplate Template:Reflist.
• Cyclobutadiene wikiPageUsesTemplate Template:Stdinchicite.
• Cyclobutadiene subject Category:Annulenes.
• Cyclobutadiene subject Category:Antiaromatic_compounds.
• Cyclobutadiene hypernym Annulene.
• Cyclobutadiene type ChemicalCompound.
• Cyclobutadiene type ChemicalSubstance.
• Cyclobutadiene type Cycloalkene.
• Cyclobutadiene type Hydrocarbon.
• Cyclobutadiene type ChemicalObject.
• Cyclobutadiene type Thing.
• Cyclobutadiene type Q11173.
• Cyclobutadiene comment "Cyclobutadiene is the smallest [n]-annulene ([4]-annulene), an extremely unstable hydrocarbon having a lifetime shorter than five seconds in the free state. It has chemical formula C4H4. It is believed to be in equilibrium between a pair of rectangular/nonplanar ground states and a square, excited triplet state based upon theoretical calculations, and through spectroscopic and crystallographic investigation of substituted cyclobutadienes, in an argon matrix and inside carceplexes.".
• Cyclobutadiene label "Cyclobutadiene".
• Cyclobutadiene sameAs Q415302.
• Cyclobutadiene sameAs حلقي_البوتاديين.
• Cyclobutadiene sameAs Cyclobutadien.
• Cyclobutadiene sameAs Κυκλοβουταδιένιο.
• Cyclobutadiene sameAs سیکلو_بوتا_دی_ان.
• Cyclobutadiene sameAs Syklobutadieeni.
• Cyclobutadiene sameAs Cyclobutadiène.
• Cyclobutadiene sameAs ציקלובוטדיאן.
• Cyclobutadiene sameAs Ciklobutadién.
• Cyclobutadiene sameAs Ցիկլոբութադիեն.
• Cyclobutadiene sameAs Ciclobutadiene.
• Cyclobutadiene sameAs シクロブタジエン.
• Cyclobutadiene sameAs Cyclobutadieen.
• Cyclobutadiene sameAs Ciclobutadieno.
• Cyclobutadiene sameAs m.03gbp4.
• Cyclobutadiene sameAs Ciclobutadienă.
• Cyclobutadiene sameAs Циклобутадиен.
• Cyclobutadiene sameAs Ciklobutadien.
• Cyclobutadiene sameAs Ciklobutadien.
• Cyclobutadiene sameAs Q415302.
• Cyclobutadiene sameAs 环丁二烯.

• next