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tert ‐Butyl 7‐cycloheptatrienylperacetate: The proton NMR spectrum and conformational analysis
Author(s) -
Jurch G. R.,
Johnston M. D.
Publication year - 1975
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.1270070210
Subject(s) - lanthanide , chemistry , substituent , proton magnetic resonance , ring (chemistry) , proton nmr , conformational isomerism , proton , reagent , nuclear magnetic resonance spectroscopy , crystallography , stereochemistry , computational chemistry , nuclear magnetic resonance , organic chemistry , molecule , physics , ion , quantum mechanics
The proton magnetic resonance spectrum of tert ‐butyl 7‐cycloheptatrienylperacetate has been analyzed with the aid of the lanthanide shift reagents, Eu(fod) 3 Yb(fod) 3 . Observation of the lanthanide‐induced shifts showed, in conjunction with variable temperature studies establishing the conformational purity of the cycloheptatrienyl ring, that the peracetate substituent has a definite equatorial preference.