SCHEDULED MAINTENANCE
1 H N.m.r. coupling constants obtained from spectral analysis of cyclohepta-1,3-diene (1) at 300 MHz are not in accord with an earlier propose Cs structure in which all but one of the carbon atoms are coplanar; instead these data indicated a distroted tub conformation of C2 symmetry.
P. Crews, J. Chem. Soc. D, 1971, 583 DOI: 10.1039/C29710000583
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