Infrared Spectrum of ν2 of Dichloroborane and Dichloroborane-d

Abstract

The ν₂ fundamental of HBCl₂ and DBCl₂ has been observed under high resolution. A series of evenly spaced lines occurs, which has the appearance of a ⊥ band of a symmetric top molecule. Analysis of the spectra gives an approximate value for the smallest moment of inertia, from which the following molecular dimensions are calculated: B–H bond length=1.13±0.2 Å and Cl–B–Cl bond angle=119.7±3°. The position of the band center, 2616.9 cm^—1, for HBCl₂, has also been determined.