15min:

SHANSHAN YU, ALIREZA SHAYESTEH AND PETER F. BERNATH, Department of Chemistry, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1.

The vibration-rotation emission spectra of CdH₂ and CdD₂ molecules have been recorded at high resolution using a Fourier transform spectrometer. The molecules were generated in a furnace-discharge emission source by reaction of cadmium vapor with molecular hydrogen or deuterium. The fundamental bands for the antisymmetric stretching mode ( ₃) of CdH₂ and CdD₂ were detected at about 1771.5 cm^-1 and 1278.3 cm^-1, respectively. In addition, the 002( ⁺_g) -- 001( ⁺_u) and 011( _g) -- 010( _u) hot bands were observed for CdH₂. Spectroscopic constants were determined for each of the twelve observed isotopologues: ¹¹⁰CdH₂, ¹¹¹CdH₂, ¹¹²CdH₂, ¹¹³CdH₂, ¹¹⁴CdH₂, ¹¹⁶CdH₂, ¹¹⁰CdD₂, ¹¹¹CdD₂, ¹¹²CdD₂, ¹¹³CdD₂, ¹¹⁴CdD₂, ¹¹⁶CdD₂. The average Cd--H and Cd--D bond distances (r₀) were determined to be 1.683028(10) Å and 1.679161(16) Å, respectively.