The He I photoelectron spectra of mixed boron trihalides and the microwave spectrum of BClF2

Abstract

Although the mixed boron halides BX_nX′_{3 – n} cannot be isolated pure, but exist in essentially statistical equilibrium with BX₃ and BX′₃, it is shown that their He I photoelectron (p.e.) spectra, as well as their microwave spectra, can be measured; the p.e. spectra of BC1F₂ and BC1₂F, and the microwave spectrum, structure, and quadrupole interaction data for BC1F₂ are described and are supported by ab initio SCF MO calculations.