Vibrational spectra of mercury(II) and methylmercury(II) thiocyanates

Abstract

The Raman spectra of Hg(SCN)2 in both the solid state and in solution have been recorded and interpreted in conjunction with the infrared spectra. For the solid state the Raman shifts for Hg-S stretching, S-C stretching, and C-N stretching are 270, 721, and 2112 cm-1 respectively. In diglyme solution the corresponding values are 278, 692, and 2139 cm- 1. The infrared and Raman spectra of CH3HgSCN in the solid state do not contain any coincidences which may indicate that the unit cell is centrosymmetric. The Raman spectrum of CH3HgSCN in CH3OH solution shows strong, sharp, polarized lines at 283, 540, 1186, and 2138 cm-1 which are attributed to Hg-S stretching, Hg-C stretching, CH3 deformation, and C-N stretching modes respectively.