The Smekal-Raman Spectra of SiHCl3, CHFCl2 and CF2Cl2

Abstract

The Smekal-Raman spectra of the compounds SiH${\mathrm{Cl}}_3$, CHF${\mathrm{Cl}}_2$ and C${\mathrm{F}}_2$ ${\mathrm{Cl}}_2$ have been investigated using a quartz mercury arc as the primary source. There are six frequency displacements in the case of silicochloroform all somewhat less than the corresponding displacements of chloroform. The so-called transverse hydrogen bond frequency is not observed. Eight frequencies of CHF${\mathrm{Cl}}_2$ and nine of C${\mathrm{F}}_2$ ${\mathrm{Cl}}_2$ have been observed. The transverse hydrogen bond vibration is not observed in the former. An assignment of the observed frequencies to particular modes of vibrations is made.