15min:
VIBRATIONAL SPECTROCOPY OF THE OCCN RADICAL THROUGH TIME RESOLVED FOURIER TRANSFORM INFRARED EMISSION SPECTROSCOPY.

W. MCNAVAGE AND H. L. DAI, Department of Chemistry, The University of Pennsylvania, PA 19104.

The CN stretch of the OCCN radical was observed for the first time at 2093 cm-1. The method of detection was by nanosecond Fourier-transform infrared emission spectroscopy. The radical was produced through UV photodissociation( lambda=193 nm) of carbonyl cyanide, CO(CN)2 and pivaloyl cyanide, CO(CN)(CH3)3 which leaves the radical with sufficient internal excitation. Infrared and near-infrared emission from all vibrationally excited species was detected. Pressure dependence, rotational band contour analysis and ab initio calculations all aided in assignment.