Knowledge Bank

Infrared spectra of $SiH4$ and $SiD4$ in the region of the fundamentals $\nu 3$ and $\nu 4$ have been obtained at $4\circ K$. The interpretation of the fine structure observed in the spectra is based on the factor group and site group theories. In addition, a 1% solution of $SiD4$ in $SiH4$ revealed interesting features in the spectra in that the degenerate bending mode has been found to split into three bands.