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.