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Far Infrared Group Frequencies. V. Oximes and Aldoximes

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The low frequency infrared spectra from 450 to 75 cm−1 of seven oximes and five aldoximes have been recorded for pure samples and for dilute solutions in cyclohexane. An intense characteristic band is present in the solution spectra at 367 ± 10 cm−1. This characteristic band shifts to 275 ± 10 cm−1 in the spectra of the OD compounds. The 367 ± 10 cm−1 and 275 ± 10 cm−1 bands are assigned to OH and OD torsional vibrations. A comparison of the solution spectra with spectra of the solid samples indicated that the OH … N hydrogen bond stretch of oximes and aldoximes occurs in 300 to 200 cm−1 region. Strong bands also are present in 140 to 100 cm−1 region which are due to OH … N bending modes or perhaps lattice vibrations.

Keywords: Aldoximes; Far infrared spectroscopy; Oximes; Torsional vibrations

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/000370273774333939

Affiliations: 1: Department of Chemistry, Miami University, Oxford, Ohio 45056 2: Air Force Materials Laboratory (LPA), Wright-Patterson Air Force Base, Ohio 45433 3: Mellon Institute, Carnegie-Mellon University, Pittsburgh, Pennsylvania 15213

Publication date: January 1, 1973

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