DIPOLE MOMENT OF IODINE MONOCHLORINE

Abstract

The $J = 2 \leftarrow 1$ microwave spectra of $I^{35}Cl$ and $I^{37}Cl$ were measured for the $v = 0$ and $v = 1$ vibrational levels. The dipole moment $a(v = 0) = 1.24(2)D$ was determined by stark effect measurements. Use of second order perturbation theory to solve the Stark effect yields an incorrect result, requiring diagonalization of a truncated Stark matrix. Improved values of the rotational and quadrupole coupling constants were obtained, and the iodine nuclear spin-rotation constant was determined.