Infrared Spectra of CICN+, CINC+, and BrCN+ Trapped in Solid Neon
Marilyn E. Jacox, Warren E. Thompson
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).
and Thompson, W.
Infrared Spectra of CICN<sup>+</sup>, CINC<sup>+</sup>, and BrCN<sup>+</sup> Trapped in Solid Neon, Journal of Chemical Physics, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=841083
(Accessed November 29, 2023)