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Conformational Study by ESR. of Some Alkyl Substituted 6a-Thiathiophthene Radical Anions by Fabian Gerson; Josef Heinzer; Madeleine Stavaux is a Chemistry article available to read on EtoBox.

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## Abstract ESR. data are reported for the radical anions (II^⊖^ to VI^⊖^) of five alkyl substituted __6a‐thiathiophthenes__. Rates and activation parameters for the inversion of the 3,4‐trimethylene chain in IV^⊖^, V^⊖^ and VI^⊖^ have been obtained by means of an iterative least squares computer program ESRCEX. Preferential conformations of the alkyl substituents are discussed in terms of the 〈cos^2^θ〉 dependence of the β‐proton coupling constants and with the aid of molecular models. Experimental evidence strongly suggests that the partial rotation of the ethyl and isopropyl groups in V^⊖^ and VI^⊖^ is correlated with the inversion of the 3,4‐trimethylene chain.

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Author

Fabian Gerson; Josef Heinzer; Madeleine Stavaux

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); Wiley-Blackwell; Wiley (ISSN 0018-019X)

Published

1973

Language

EN

Field

Chemistry (Physical Sciences)