Vibrational Spectra and Normal Coordinate Calculations of HgNH2Cl and HgNH2Br

Abstract

Abstract Infrared spectra of HgNH2Cl and HgNH2Br and the Raman spectrum of HgNH2Cl have been measured in the region from 4000 cm−1 to 30 cm−1. Effects of changing the X(X=Cl,Br) ion were observed mainly in N–H stretching bands and in lattice vibrations. Calculations of normal frequencies were carried out using a force field which includes inter-molecular forces. An assignment of the lattice vibrations was proposed and the force constants were also calculated. The force constants of the inter-molecular hydrogen bonds N–H···Cl and N–H···Br were obtained as 0.212 mdyn/Å and 0.142 mdyn/Å, respectively.