Infrared Spectra of CICN+, CINC+, and BrCN+ Trapped in Solid Neon

Published

June 27, 2007

Author(s)

Marilyn E. Jacox, Warren E. Thompson

Abstract

When a mixture of ClCN or BrCN with a large excess of neon is codeposited at 4.3 K with a beam of neon atoms that have been excited in a microwave discharge, the infrared spectrum of the resulting solid includes prominent absorptions of the uncharged isocyanide, ClNC or BrNC, and of the corresponding cation, ClCN+ or BrCN+. The NC-stretching fundamentals of the isocyanides trapped in solid neon lie close to the positions for their previously reported argon-matrix counterparts. The CN-stretching absorptions of ClCN+ and BrCN+ and the CCl-stretching absorption of ClCN+ appear very close to the gas-phase band centers. Absorptions of two overtones and one combination band of ClCN+ are identified. Reversible photoisomerization of ClCN+ to ClNC+ occurs. The two stretching vibrational fundamentals and several infrared and near infrared absorptions associated with electronic transitions of ClNC+ are observed. Minor infrared peaks are attributed to the vibrational fundamental absorptions of the CX and CX+ species (X = Cl, Br).

Citation

Journal of Chemical Physics

Pub Type

Journals

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Keywords

BrCN+, CBr, CBr+, CINC+, infrared spectrum, neon matrix, photoisomerization

Citation

Jacox, M. and Thompson, W. (2007), Infrared Spectra of CICN⁺, CINC⁺, and BrCN⁺ Trapped in Solid Neon, Journal of Chemical Physics, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=841083 (Accessed November 7, 2025)