Abstract

The infrared spectra of NCO− isolated in CsCl, CsBr, and CsI have been obtained using the alkali halide pressed disk technique. Samples enriched with both 13C and 15N were prepared. The anharmonic force field of NCO− has been determined in each lattice using a simplified quartic force field. The anharmonicity constants, Xij, the anharmonic force constants, and the quadratic stretch-stretch interaction force constant have been determined to be essentially independent of the matrix.

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