Absolute integrated intensities of the infrared absorption bands of TiCl4

The absolute integrated molar absorption coefficients Ai have been measured for the ν3 fundamental and for the stronger binary combination bands of TiCl4 in the vapor phase. The experimental value for A3, the coefficient of the TiCl4 ν3 fundamental vibration, is 277±42 km mole−1. This value is compared with 320 ±40 km mole−1 predicted from the mean transition movement ‖μz01‖?0.29±0.04 D given by Fox and Person for asymmetric X–Cl stretching vibrations of tetrahedral molecules. Another prediction, based on transfer of effective charges for the Cl atom, yields A3≲125 km mole−1. The implications of these results are discussed.