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Spectroscopic study demonstrates complete vibrational frequency assignments for twelve nitrous oxide isotopomers in solid nitrogen, highlighting matrix effects on molecular anharmonicity.
Isotopically labeled nitrous oxide has been produced in solid nitrogen matrices using mixtures of nitrogen and water containing N14, N15, O16, O17, and O18. All twelve possible N2O isotopomers have been obtained, and their fundamental, overtone and combination frequencies were assigned by the joint use of infrared spectroscopy and quantum chemical calculations (B3LYP/AUG-cc-pVTZ). Specific influence of the nitrogen matrix upon frequency and anharmonicity of the vibrations has been discussed.
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Łapiński et al. (2001) studied this question.
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