High-field proton and carbon-13 nuclear magnetic resonance studies of the conformational dynamic properties of seven-membered rings. 1, 5-Benzodithiepin and 3- …

D Menard, M St-Jacques

Index: Menard, D.; St-Jacques, M. Canadian Journal of Chemistry, 1986 , vol. 64, p. 2142 - 2151

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Citation Number: 3

Abstract

The conformational and dynamic properties of 1, 5-benzodithiepin (1), its 3, 3-dimethyl (2), 3- methyl (3), and 3-methoxy (4) derivatives have been investigated by high-field 1H and 13C dynamic nuclear magnetic resonance methods. Analyses of the spectra at low temperatures indicate that, in CS2, both 1 and 2 exist as a mixture of C and TB forms (97: 3 for 1; 63: 37 for 2). In contrast, both 3 and 4 exist as a mixture of three equilibrating conformations Ce, Ca, ...