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Substituent‐Induced chemical shifts of 2‐phenylthiazolidines— 1 H NMR study
Author(s) -
Umarani R.
Publication year - 1990
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260280902
Subject(s) - substituent , chemistry , chemical shift , halogen , proton nmr , correlation coefficient , computational chemistry , stereochemistry , organic chemistry , statistics , alkyl , mathematics
The 1 H NMR 270‐MHz spectra of substituted 2‐phenylthiazolidines were recorded and the substituent‐induced chemical shifts (SCS) of the benzylic proton plotted against σ, the correlation coefficient being 0.801 and −ρ = 10.29 Hz. Halogens show deviations in the SCS plots. When the halogen‐substituted derivatives are omitted, the correlation with σ is greatly improved. The applicability of dual‐substituent correlations using Swin‐Lupton parameters ( F and R ) and Taft's σ 1 , σ R parameters has been studied.
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