The integrated intensities of the fundamental modes in HCF3 and DCF3 have been measured by Wilson–Wells–Penner–Weber method, and the atomic polar tensors were derived. The effective atomic charge for fluorine was found to be χ F/e= 0.598±0.018, in good agreement with that in other fluorocarbons. The effective atomic charge for hydrogen was found to be χH/e= 0.049±0.006, a value somewhat lower than that found in other ...
