Resonance Raman investigation of the short-time photodissociation dynamics of the charge-transfer absorption of the i2-Benzene Complex in Benzene Solution

Abstract

Resonance Raman spectra were obtained for the I2-benzene complex in benzene solvent with excitation wavelengths in resonance with the CT-band absorption. These spectra indicate that the Franck-Condon region photodissociation dynamics have multidimensional character with motion mainly along the nominal I-I stretch mode v 18, the nominal symmetric benzene ring stretch mode v 5, and the nominal symmetric CCH bending v 7. There is also a small contribution from the nominal out-of-plane CH oop wag v 15. A preliminary resonance Raman intensity analysis was done, and the results for the I 2-benzene complex were compared to results previously reported for the 1-hexene-I2 complex. We briefly discuss the differences and similarities in the CT-band absorption excitation of an I2-benzene complex relative to those of an I 2-alkene complex. © 2006 American Chemical Society.