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Chemical modifications of phenoxy resin. Synthesis and 1 H NMR study of model compounds
Author(s) -
FdezBerridi Maria J.,
Iruin Juan J.,
de Ilarduya Antton Martinez,
de Gauna Asun Ruiz,
Valero Miguel
Publication year - 1991
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.1260291006
Subject(s) - chemistry , methylene , substituent , conformational isomerism , chemical shift , nmr spectra database , proton nmr , spectral line , group (periodic table) , carbon 13 nmr , stereochemistry , computational chemistry , medicinal chemistry , molecule , organic chemistry , physics , astronomy
The hydroxy group of phenoxy resin has been modified by etherification and esterification. The 1 H NMR spectra of these products show large differences in the splitting patterns of the methylene protons according to the chemical nature of the substituent groups. Model compounds for phenoxy resin and derivatives, as well as some other glycerol derivatives, have been synthesized in order to study in more detail the signals of the CH 2 group. The 1 H NMR spectra of these compounds show two types of splitting. In some cases both protons absorb clearly as a doublet through accidental equivalence, while in other cases they are magnetically non‐equivalent. This behaviour can be explained by non uniform conformer populations ( J AX ≠ J BX ) in some cases, but where J AX ≈ J BX it could not be explained without taking into account the molecular asymmetry.