Vibrational structure of molecular charge transfer bands, part. I. hydrocarbon-tetrahalo p-benzoquinone complexes in solution

Department of Chemistry, University College of Science, Calcutta-9, India.

Résumé

Under high resolution the electronic charge transfer band of hydrocarbon-tetrahalo p-benzoquinone complexes in chloroform have been found to show vibrational structure of very low frequency of 150-250 cm^-1. This has been associated with the change in donor-acceptor bond. The force constant of the intermolecular bond lies in the range

1,35-1,70 X 105 dynes/cm

for a series of complexes.