Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases p. 3021 - 3036 (1984)
Update date:2022-08-11
Topics:
Smith, Ian M.
Sutcliffe, Leslie H.
Wiesner, Stefan
Lubitz, Wolfgang
Kurreck, Harry
N.m.r. spectroscopy has been used to study the electron-exchange reaction between the substrate-radical pairs of 2,3,4,7,8,9-hexahydro-2,2,5,7,7,10-hexamethylbenzo<1,2-b:4,5-b'>dipyran, 2,3,4,5,6,7-hexahydro-2,2,7,7,9,10-hexamethylbenzo<1,2-b:4,3-b'>dipyran and 2,3,6,7-tetrahydro-2,2,4,6,6,8-hexamethylbenzo<1,2-b:4,5-b'>difuran and their cation radicals.The rate constants and energetics of activation of the reactions have been determined, along with absolute signs of the averaged proton hyperfine coupling constants.ENDOR and TRIPLE measurements provided accurate values of the individual coupling constants and their relative signs: the n.mr. and ENDOR data taken together gaved complete assignment.
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