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Structure and Dynamics of Intramolecular Hydrogen Bonds in Radicals: Substituent, steric and solvent effects
Author(s) -
Loth Klaus,
Graf Federico
Publication year - 1981
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19810640624
Subject(s) - chemistry , intramolecular force , steric effects , radical , intermolecular force , hydrogen bond , photochemistry , substituent , semiquinone , solvent , computational chemistry , solvent effects , crystallography , molecule , stereochemistry , organic chemistry , quinone
The temperature and solvent dependence of the ESR. spectra of a number of semiquinone‐ and semidione‐type radicals have been investigated with the aim of obtaining structural and kinetic information about intramolecular hydrogen bonding. Systematic variation of the chemical structure of the radicals indicates that in many cases formation and/or exchange of intramolecular H‐bonds is disturbed or even precluded by steric hindrance or concomitant dynamic processes, such as internal rotation and/or intermolecular proton exchange.