Assignment of h.f.s. constants of 1,4-benzosemiquinones by additivity rules. The free rotation oft-butyl groups
- 1 October 1974
- journal article
- research article
- Published by Taylor & Francis in Molecular Physics
- Vol. 28 (4) , 1031-1035
- https://doi.org/10.1080/00268977400102341
Abstract
A set of equations for assigning hyperfine coupling constants of substituted 1,4-benzosemiquinones are presented. The equations, based on additivity rules, yield assignments for a range of substituents with a correlation between predicted and experimental constants to better than five per cent. The investigation shows that t-butyl groups in semiquinones rotate freely against prior assertions.Keywords
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