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Stereochemical characterization of some mono‐ and diaryl substituted ethylene oxides by NMR spectroscopy
Author(s) -
Ceccarelli Giulio,
Berti Giancarlo,
Lippi Giorgio,
Macchia Bruno
Publication year - 1970
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.1270020409
Subject(s) - chemical shift , coupling constant , chemistry , nuclear magnetic resonance spectroscopy , ethylene , styrene , characterization (materials science) , spectroscopy , carbon 13 nmr satellite , nmr spectra database , cis–trans isomerism , spectral line , deuterium nmr , resonance (particle physics) , fluorine 19 nmr , computational chemistry , stereochemistry , organic chemistry , materials science , physics , nanotechnology , copolymer , polymer , catalysis , particle physics , quantum mechanics , astronomy
NMR spectra of several styrene, stilbene and stilbazole oxides have been determined, and chemical shifts and coupling constants have been correlated with cis ‐and trans ‐configurations. Assignments have been made for all protons, and double resonance technique and 13 CH coupling constants have been used in some particular cases. An explanation is proposed for the observation that chemical shifts of oxirane protons are higher for cis than for trans isomers.