Matrix isolation study of the interaction of excited neon atoms with BCl3: Infrared spectra of BCl+3, BCl+2, and BCl−3

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Abstract
When a Ne:BCl3 sample is codeposited at approximately 5 K with a beam of neon atoms that have been excited in a microwave discharge, the infrared spectrum of the resulting solid deposit shows a weak to moderately intense absorption of BCl2 and more prominent absorptions which are assigned to the ν3 fundamentals of BCl+3 (D3h) and of linear, centrosymmetric BCl+2. The boron- and chlorine-isotopic structure of the spectrum is consistent with both of these assignments. Ab initio calculations support the BCl+2 assignment. An absorption is also tentatively assigned to ν3(e) of BCl−3. Ab initio calculations for BCl−3 are consistent with that assignment. The processes which occur when the solid deposit is exposed to visible and ultraviolet radiation are considered.