Perpendicular Band Contours and Vibrational Potential Function of the E′ Vibrations of AsF5

A computer program has been written that synthesizes the perpendicular band contours of symmetrictop molecules. This program was applied to the E′ vibrations of AsF5 and Coriolis constants were determined. The Coriolis constants and vibrational frequencies were then used to fit an E′ vibrational potential function. Two force fields were found, one of which has a normal coordinate which may explain the equivalence of the axial and equatorial fluorines in the NMR spectrum.