ROTATIONAL SPECTRUM, MOLECULAR-CONSTANTS, AND DIPOLE-MOMENT OF THE SYN FORM OF VINYLPHOSPHINE

The rotational spectrum of the syn conformer of vinylphosphine from 8 to 250 GHz has been measured. The assignment was based on nb initio ca lculations performed at the MP2 level using the 6-311G (2d, p) basis s et. Rotational and centrifugal distortion constants up to the sextic t erms were determined. The dipole moment was measured using the Stark e ffect. It is to be noted that the ab initio structure reproduces the e xperimental data satisfactorily. (C) 1996 Academic Press, Inc.