10min:

THOMAS J. CRONIN, XIAOLIANG WANG, GREGORY BETHARDY AND DAVID S. PERRY, Department of Chemistry, University of Akron, Akron, OH 44325-3601.

A jet-cooled high resolution infrared spectrum was recorded in a slit-jet apparatus in the asymmetric C-H stretching region of CH₂F₂ between 3002 and 3036 cm^-1. Approximately 630 transitions were detected of which about 250 were assigned to the ₆ band and about 170 were assigned to the 2₂ overtone at a resolution of ~0.002 cm^-1. Seven sub-bands were identified in each vibrational band. The assigned transitions were fitted to a Watson Hamiltonian for an asymmetric rotor (\kappa = -.932) in the A-reduced I^r representation. The fitted upper state constants in cm^-1 for each band are tabulated below. Numbers in parantheses indicate the precision of the fit to two standard deviations in the last digit.

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TABLE

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