15min:

ALIREZA SHAYESTEH, DOMINIQUE R. T. APPADOO AND P. F. BERNATH, Department of Chemistry, University of Waterloo, Waterloo, ON, N2L 3G1, Canada; IOULI E. GORDON, Department of Physics, University of Waterloo, Waterloo, ON, N2L 3G1, Canada.

High resolution infrared emission spectra of gaseous ZnH₂ and ZnD₂ have been recorded with a Fourier transform spectrometer. The molecules were generated in an emission source that combines an electrical discharge with a high temperature furnace. The vibration-rotation emission spectra of ZnH₂ and ZnD₂ were recorded in the 1200-2200 cm^-1 region at an instrumental resolution of 0.01 cm^-1. The antisymmetric stretching fundamental bands, 001-000, of ~⁶⁴ZnH₂ and ⁶⁴ZnD₂ were observed near 1889.4 cm^-1 and 1371.6 cm^-1, respectively, and for the minor isotopes of zinc, ⁶⁶Zn and ⁶⁸Zn, the band origins were shifted by approximately 1-2 cm^-1. Preliminary analysis of the spectra resulted in r₀ values of 1.535271(1) Å ~and 1.531833(9) Å ~for ⁶⁴ZnH₂ and ⁶⁴ZnD₂, respectively. Several hot bands of ZnH₂ involving ₁, ₂ and ₃ have also been observed, and analysis of these bands will lead to an equilibrium structure (r_e) for ZnH₂. The results will be presented at the symposium.