Cycloheptatrienyl radicals: An EPR study of substituent effects

F MacCorquodale, JC Walton

Index: MacCorquodale, Finlay; Walton, John C. Magnetic Resonance in Chemistry, 1990 , vol. 28, p. 364 - 369

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Citation Number: 3

Abstract

Abstract Cycloheptatrienyl radicals with donor and acceptor substituents were generated by hydrogen abstraction from the corresponding cycloheptatrienes and studied by EPR spectroscopy. The barrier to rotation about the C-1 [BOND] C [DOUBLE BOND] O bond in ethoxycarbonylcycloheptatrienyl radicals was found to be ca. 7.5 kcal mol− 1 (31.4 kJ mol− 1). The observed hyperfine splittings of the ring hydrogens were interpreted in terms of a ...