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Type: Artigo de periódico
Title: Substituent-induced H-1 chemical shifts of 3-substituted camphors
Author: Kaiser, CR
Rittner, R
Basso, EA
Abstract: The high-field H-1 NMR analysis of 3-substituted camphors with OH, OMe, SMe, NHMe, NMe2 and Me substituents at endo and exo positions, and also with an oxo substituent, is reported. The substituent-induced chemical shifts (SCS) obtained for these difunctional systems, including those from previous work on 3-halocamphors, were examined in view of multilinear correlations with steric and electronic parameters. The resultant data show a strong contribution from the electric field mechanism, principally for the protons closer to the substituent. Carbonyl group interference on the expected SCS for the alpha-proton is also observed, with less deshielding than those of substituted bornanes and norbornanes. (C) 1997 by John Wiley & Sons, Ltd.
Subject: H-1 NMR chemical shifts
substituent-induced chemical shifts
3-substituted camphors
steric effects
electronic effects
Country: Inglaterra
Editor: John Wiley & Sons Ltd
Rights: fechado
Identifier DOI: 10.1002/(SICI)1097-458X(199709)35:9<609
Date Issue: 1997
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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