Abstract
The i.r. absorption intensities of gaseous HCOF and DCOF have been measured under high pressure. The intensity analysis has been carried out, and the derivatives of molecular dipole-moment with respect to a bond stretching or a valence angle deformation have been determined as intensity vectors by the least squares method. Assuming the directions of intensity vectors are those calculated by the CNDO/2 or INDO method, their magnitudes have been determined as follows: a CH = − 0.22, a CO = − 2.90 and a CF = − 5.02( D/Å). Above values are close to those of intensity vectors of unsaturated fluorocarbons. The effect of π electrons on the intensity vectors is briefly discussed.
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