For the first time, complexes involving carbonyl sulfide (OCS) and water molecules are studied by FTIR in solid neon. Many new absorption bands close to the known fundamental modes for the monomers give evidence for at least three (OCS)(n)-(H2O)(m) complexes, noted n:m. With the help of theoretical calculations, two isomers of the 1: 1 complex are clearly identified. Concentration effects combined with a detailed vibrational analysis allow for the identification of transitions for the 1: 1, 1:2, and 2:1 complexes. Anharmonic coupling constants have been derived from the observations of overtones and combinations. Published by AIP Publishing.
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