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Strained cyclobutane compounds: 1 H NMR analysis of a new 1‐substituted benzobicyclo[3.1.1]heptene system
Author(s) -
Escale R.,
Khayat A.,
Girard J. P.,
Rossi J. C.,
Chapat J. P.
Publication year - 1981
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.1270170318
Subject(s) - cyclobutane , heptene , coupling constant , ring (chemistry) , chemistry , spectral line , spin (aerodynamics) , proton , crystallography , stereochemistry , physics , bicyclic molecule , nuclear physics , organic chemistry , particle physics , thermodynamics , astronomy
The 1 H NMR spectra of a number of new derivatives of benzobicyclo[3.1.1]heptene were examined and interpreted by using a single set of coupling constants. All the compounds belonging to this system are in a γ‐shaped configuration. Surprisingly, two different proton‐proton spin‐spin coupling constants ( 4 J =5.5 to 6 Hz and 8.5 Hz) were obtained for the cyclobutane ring.