Knowledge Bank

High resolution infrared emission speetra 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 $1200-2200cm-1$ region at an instrumental resolution of $0.01cm-1$. The antisymmetric stretching fundamental bands, $001-000$, of $\mathrm{<mrow\; data-mjx-texclass="ORD">64</mrow>}ZnH2$ and $\mathrm{<mrow\; data-mjx-texclass="ORD">64</mrow>}ZnD2$ were observed near $1889.4cm-1$ and $1371.6cm-1$, respectively, and for the minor isotopes of zinc, $\mathrm{<mrow\; data-mjx-texclass="ORD">66</mrow>}$Zn and $\mathrm{<mrow\; data-mjx-texclass="ORD">68</mrow>}$Zn, the band origins were shifted by approximately $1-2cm-1$. Preliminary analysis of the spectra resulted in $r0$ values of $1.535271(1)\backslash AA$ and $1.531833(9)\backslash AA$ for $\mathrm{<mrow\; data-mjx-texclass="ORD">64</mrow>}ZnH2$ and $\mathrm{<mrow\; data-mjx-texclass="ORD">64</mrow>}ZnD2$, respectively. Several hot bands of $ZnH2$ involving $\nu 1,\nu 2$ and $\nu 3$ have also been observed, and analysis of these bands will lead to an equilibrium structure $(re)$ for $ZnH2$. The results will be presented at the symposium.