Vibrational spectrum and thermodynamic properties of phenylboron dichloride

Abstract

Infrared and Raman spectra of phenylboron dichloride have been recorded from 1650 to 20 cm.^–1. The thirty-one vibrational modes active in these regions complete the assignment of the spectrum in good agreement with C_2v symmetry (for Ph³⁵BCl₂) and C₈ symmetry (for Ph³⁵BCl³⁷Cl). The barrier to rotation about the boron–carbon link is calculated as ca. 45 kcal. mole^–1, signifying considerable π-character in the bond. Thermodynamic properties are tabulated over the range 0–500°.