A combination of methods employing diastereomeric transformation and n.m.r. line-shape analysis have been used to determine the activation parameters over a 100° temperature range (ΔH‡= 15·7 kcal./mole and ΔS‡=– 2 e.u.) for syn–anti-isomerization of N-(1,2,3-trimethyl-2-butenylidene)benzenesulphonamide.
E. Carlson, F. B. Jones and M. Raban, J. Chem. Soc. D, 1969, 1235b DOI: 10.1039/C2969001235B
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