Vibrational spectroscopic studies and normal coordinate analyses of TiCl₄ donor-acceptor complexes

Abstract

Laser Raman spectra and infrared spectra are reported for TiCl₄,2MeCN, TiCl₄,2PhCN, TiCl₄,2py, TiBr₄,2MeCN. For purposes of comparison the Raman spectrum of SnC1₄,2Ph₃P has been recorded and assigned. Analysis of data indicates that a cis octahedral configuration is adopted by the TiC1₄,2L complexes and a trans configuration by SnCl₄,2Ph₃P. In addition a new complex, 3TiC1₄,4cpy, has been prepared and spectral data indicate the ligand bonds through its nitrogen heteroatom. Normal coordinate analyses and Urey-Bradley force constants are reported for TiC1₄,2MeCN and TiCl₄,^- 2PhCN.