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The dynamic stereochemistry of dimesityl‐2,4,6‐trimethoxyphenylmethane: A 1 H NMR study at 270 MHz
Author(s) -
Willem R.,
Hoogzand C.
Publication year - 1979
Publication title -
organic magnetic resonance
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0030-4921
DOI - 10.1002/mrc.1270120202
Subject(s) - spectral line , spectroscopy , chemistry , nuclear magnetic resonance spectroscopy , nmr spectra database , order (exchange) , ring (chemistry) , nuclear magnetic resonance , crystallography , stereochemistry , physics , organic chemistry , quantum mechanics , astronomy , finance , economics
Abstract The spectral behaviour of dimesityl‐2,4,6‐trimethoxyphenylmethane (1) was examined by 1 H NMR spectroscopy at 270 MHz in order to resolve an isochrony of resonances observed in the low temperature spectra of 1 at 60 MHz. At 270 MHz the spectra of 1 exhibit well resolved o ‐methyl resonances at low temperature so that the two‐ring flip mechanism, previously proposed as the threshold mechanism by Mislow et al. , receives new independent experimental support.