\\| ̷ ̷ ̷ ̷+\ noun
Etymology: hyper- + conjugation
: resonance in an organic chemical structure that involves as part of the resonance hybrid the separation of a proton from a methyl or other alkyl group situated next to an electron-deficient unit (as a double bond or carbonium ion), the electrons released by the proton tending to move toward the electron-deficient function with resultant stabilization of the entire structure (as in a trisubstituted propylene H−CH2 CR = CR2↔H+CH2 = CR−CR2-) — called also no-bond resonance

Useful english dictionary. 2012.

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  • Hyperconjugation — In organic chemistry, hyperconjugation is the interaction of the electrons in a sigma bond (usually C–H or C–C) with an adjacent empty (or partially filled) non bonding p orbital or antibonding π orbital or filled π orbital, to give an extended… …   Wikipedia

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  • hyperconjugation — noun A weak form of conjugation in which single bonds interact with a conjugated system …   Wiktionary

  • hyperconjugation — hy·per·conjugation …   English syllables

  • Negative hyperconjugation — A schematic representation of negative hyperconjugation. In real systems, several of the hydrogens are replaced with other functional groups. In organic chemistry, negative hyperconjugation is the donation of electron density from a filled π or p …   Wikipedia

  • Hiperconjugación — En química orgánica, la hiperconjugación es la interacción estabilizante que resulta de la interacción de los electrones en un orbital sigma (generalmente C H o C C) con un orbital pi adyacente vacío, no enlazante o antienlazantes, o con un… …   Wikipedia Español

  • Alkane stereochemistry — concerns the stereochemistry of linear alkanes and the linear alkane conformers. The existence of more than one conformation is due to hindered rotation around sp3 hybridised carbon carbon bonds. The smallest molecule with such a chemical bond,… …   Wikipedia

  • Gauche effect — Main article: alkane stereochemistry The term gauche refers to conformational isomers (conformers) where two vicinal groups are separated by a 60° torsion angle. IUPAC defines groups as gauche if they have a synclinal alignment of groups attached …   Wikipedia

  • Beta-silicon effect — The beta silicon effect also called silicon hyperconjugation in organosilicon chemistry is a special type of hyperconjugation and describes the stabilizing effect of a silicon atom placed in a position once removed (β) from a carbocation. A… …   Wikipedia

  • Conjugated system — Cinnamaldehyde, a type of phenolic compound with a conjugated system …   Wikipedia

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