Titlebook: Steric and Stereoelectronic Effects in Organic Chemistry; Veejendra K. Yadav Book 20161st edition Springer Science+Business Media Singapor

熱心

Diastereoselectivity in Organic Reactions,the facial selectivities of a number of substrates, including the better .-selectivity of .,.-2,3-diethyl-7-norbornanone in comparison to that of .,.-2,3-dimethyl-7-norbornanone, have been convincingly explained.

去掉

Veejendra K. YadavExplains steric and stereoelectronic effects which control reactions.Offers clear visual effects for easy understanding of the stereochemical relationships.Provides lucid explanations to retain clarit

同步信息

A(1,2) and A(1,3) Strains, facial selectivity of reactions such as [2,3] and [3,3] sigmatropic shifts, intramolecular S.2 reactions, hydroboration, enolate alkylation, etc. is highlighted. The high diastereoselectivity observed in the reactions of enolates derived from 4-substituted .-alkanoyl-1,3-oxazolidinones (Evans enolates) with electrophiles is discussed.

獸皮

,The Conservation of Orbital Symmetry (Woodward–Hoffmann Rules), the symmetry characteristics of the σ, ., π and . molecular orbitals (MOs). This is followed by a description of the MOs and their symmetry characteristics for allyl cation, allyl radical, allyl anion, and 1,3-butadiene. This concept is applied to π.?+?π., π.?+?π. (Diels–Alder) and electrocyclic reactions.

Pillory

Grating

Miscellaneous,eriselectivity in pericyclic reactions, torquoselectivity in conrotatory-ring openings, ambident nucleophiles and electrophiles, α-effect in nucleophilicity, carbene addition to 1,3-dienes, Hammett’s substituent constants, Hammond postulate, Curtin–Hammett principle, and diastereotopic, homotopic, and enantiotopic substituents.

dura-mater

978-981-10-9339-5Springer Science+Business Media Singapore 2016

insolence

Harbor

GEST

ic purposes. The risks associated with radiation exposure and handling led to the parallel development of the field of radiation protection..Pioneering experiments done by Sanche and co-workers in 2000 showed that low-energy secondary electrons, which are abundantly generated along radiation tracks,