15min:

CHRISTOPHER ANNESLEY, ROBERT J. HOLIDAY, CHAN HO KWON, F. FLEMING CRIM, Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706.

Product state distributions and action spectra for the reaction of vibrationally state selected \chemCH₃D with Cl, \chemCH₃D( ) + Cl (CH₂D + HCl) or \chem(CH₃ + DCl), reveal the extent to which vibrational energy initially deposited in the reactant survives in the \chemCH₂D and \chemCH₃ products as well the reactivity of different excited vibrational states. There have been several studies of various deuterated methanes with different bonds excited. Most recently, our lab studied the C-H stretch overtone in the 6000 cm^-1 region, where we found further support for the spectator model. We found that one C-H oscillator survived into the products from states that are composed of 2 separate C-H oscillators as opposed to an overtone in one oscillator. We are studying the lower energy 5000 cm^-1 to 5500 cm^-1 region, where we can excite combination bands that involve C-H and C-D motion to determine the relative effect on reactivity of each vibrational mode in this region.