Infrared spectra of MeTiCl3 species, methyl group geometry and a force field
摘要:
Infrared spectra have been recorded between 4000 and 200 cm-1 from 12CH3TiCl3 in the gas and solid, and 12CD3TiCl3 in the gas phase. 13CH3TiCl3 and CHD2TiCl3 have been studied in the gas phase down to 450 cm-1. All fundamentals, apart from the torsion and delta-TiCl modes, are securely located. The delta(as)CH3 and rho-CH3 frequencies are abnormally low, the remaining vibrations of the methyl group being normal for an organometallic compound. The nu-CH and nu-CD frequencies are consistent with the unexceptional methyl geometry of a recent electron diffraction investigation, with angle HCH almost-equal-to 110.8-degrees. They show no sign of an "agostic" interaction in the solid state. A force field having five off-diagonal constants has been determined.