- valence isomer
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Any of a set of structural isomers that are related by a pericyclic reaction
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valence isomer
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Valence isomer — In organic chemistry, two molecules are valence isomers when they are constitutional isomers that can interconvert through pericyclic reactions. [GoldBookRef |file=V06590 |year=1994 |title=Valence isomer] For example, Dewar benzene transforms… … Wikipedia
Isomer — This article is about the chemical concept. For isomerism of atomic nuclei, see nuclear isomer. In chemistry, isomers (from Greek ἰσομερής, isomerès; isos = equal , méros = part ) are compounds with the same molecular formula but different… … Wikipedia
Coronene — Other names … Wikipedia
Silabenzene — ity. The chemical structure of silabenzene is shown to the right.Although several heteroaromatic compounds bearing nitrogen, oxygen, and sulfur atoms have been known since the early stages of organic chemistry, silabenzene had been considered to… … Wikipedia
Norbornadiene — Norbornadiene … Wikipedia
Dithiolene — A 1,2 dithiolene is an unsaturated bidentate ligand wherein the two donor atoms are sulfur. These ligands readily form complexes by co ordinating to metal centres via the sulfur atoms; such complexes are often referred to as metallodithiolenes or … Wikipedia
benzvalene — noun A highly reactive tricyclic unsaturated hydrocarbon, tricyclo[3.1 0.0]hex 3 ene, that is a valence isomer of benzene … Wiktionary
Metal dithiolene complex — Metal dithiolene complexes are complexes containing dithiolene ligands. Dithiolene ligands are unsaturated bidentate ligand wherein the two donor atoms are sulfur. Dithiolenes are often referred to as metallodithiolenes or dithiolene complexes… … Wikipedia
coordination compound — Chem. complex (def. 10). Also called coordination complex. * * * ▪ chemistry Introduction any of a class of substances with chemical structures in which a central metal atom is surrounded by nonmetal atoms or groups of atoms, called ligands… … Universalium
Ab initio quantum chemistry methods — are computational chemistry methods based on quantum chemistry.[1] The term ab initio was first used in quantum chemistry by Robert Parr and coworkers, including David Craig in a semiempirical study on the excited states of benzene.[2][3] The… … Wikipedia
