Vibrational spectra of N,N-dimethylsulfamide and its C,C′- and N,N-deuterated compounds

Abstract

The polarized i.r. spectra and the Raman spectra of N,N-dimethylsulfamide and its C,C′-and N,N-deuterated compounds in the solid state have been measured. Vibrational assignments have been made by referring to the isotopic frequency shifts and the i.r. dichroism. A normal coordinate analysis based on the molecular symmetry of C_s has been carried out by using the modified Urey-Bradley force field. The C_s model reproduced well the observed fundamental frequencies of the four isotopic molecules.