- sigmatropic
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Describing any rearrangement reaction in which single bonds are broken and others are formed
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sigmatropic
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sigmatropic — sigmatropinis statusas T sritis chemija apibrėžtis Susijęs su viengubuoju ryšiu. atitikmenys: angl. sigmatropic rus. сигматропный … Chemijos terminų aiškinamasis žodynas
Sigmatropic reaction — A Sigmatropic reaction in organic chemistry is a pericyclic reaction wherein the net result is one sigma bond changed to another sigma bond [F.A. Carey, R.J. Sundberg, Advanced Organic Chemistry Part A ISBN 0 306 41198 9] . In this type of… … Wikipedia
sigmatropic — … Useful english dictionary
2,3-sigmatropic rearrangement — 2,3 Sigmatropic rearrangements are a type of sigmatropic rearrangements and can be classified into two types. Rearrangements of allylic sulfoxides, amine oxides, selenoxides are neutral. Rearrangements of carbanions of allyl ethers are anionic.… … Wikipedia
Pericyclic reaction — In organic chemistry, a pericyclic reaction is a type of organic reaction wherein the transition state of the molecule has a cyclic geometry, and the reaction progresses in a concerted fashion. Pericyclic reactions are usually rearrangement… … Wikipedia
Claisen rearrangement — The Claisen rearrangement (not to be confused with the Claisen condensation) is a powerful carbon carbon bond forming chemical reaction discovered by Rainer Ludwig Claisen. The heating of an allyl vinyl ether will initiate a [3,3] sigmatropic… … Wikipedia
Sundaresan Prabhakar — is a synthetic organic chemist. He was born in 1937 in Madras (Chennai) (Tamil Nadu, India), where he was educated. He obtained his PhD under the supervision of [http://www.ias.ac.in/currsci/jan252002/219.pdf Professor T. R. Govindachari] in 1963 … Wikipedia
Cyclopentadiene — Cyclopentadiene … Wikipedia
Kinetic isotope effect — The kinetic isotope effect (KIE) is the ratio of reaction rates of two different isotopically labeled molecules in a chemical reaction. It is also called isotope fractionation, although this term is somewhat broader in meaning. A KIE involving… … Wikipedia
Fischer indole synthesis — The Fischer indole synthesis is a chemical reaction that produces the aromatic heterocycle indole from a (substituted) phenylhydrazine and an aldehyde or ketone under acidic conditions. [Fischer, E.; Jourdan, F. Ber. 1883, 16 , 2241.] [Fischer, E … Wikipedia
