Examination of the A-band short-time photodissociation dynamics of the equatorial conformer of iodocyclohexane

An A-band resonance Raman spectrum of iodocyclohexane in acetonitrile solution was obtained and a resonance Raman intensity analysis was done to investigate the short-time photodissociation dynamics of equatorial iodocyclohexane. The C–I bond length changes suggest that the cyclohexyl radical receives substantial internal excitation. Comparison of equatorial iodocyclohexane with the A-band short-time photodissociation of several non-cyclic iodoalkanes indicates that the geometry of the C–I bond relative to the plane of the α-, β-, and γ-carbon atoms of the cyclohexyl group is important in determining the degree of internal excitation of the cyclohexy photofragment.