The Vibrational Assignment and Force Constants of Halogenomethylsilanes and Their Germanium Analogues: ClCH2SiH3, ClCH2SiD3, BrCH2SiH3, BrCH2SiD3, CICH2GeH3, and CICH2GeD3

The infrared spectra of ClCH2SiH3, ClCH2SiD3, BrCH2SiH3, BrCH2SiD3, ClCH2GeH3, and ClCH2GeD3for both the gaseous and solid states in the 250–4000 cm−1 region have been obtained. All the fundamental vibrations except for the skeletal bending and YH3(–D3) (Y=Si, Ge) torsional vibrations have been observed and assigned. The normal vibration calculation has been carried out using a modified Urey-Bradley force field. The transferability of the force constants has also been investigated.