Normal coordinate analysis of titanium(IV) halide: monoethylenediamine complexes

A partial normal coordinate analysis was performed for the Ti(en)X 4 complexes, assuming gauche configuration of the ligand and overall symmetry of C 2 for the complex. Comparison of the calculated frequencies with the available experimental data supports the assumption of the chelate structure for the complexes and also confirms the previous assignments for the TiN stretching frequencies. Some new assignments are proposed in the 900-300 cm −1 region.