Fourier Transform Infrared Spectra of Formaldoxime: The ν7, ν9, ν11, ν12, and 2ν12Bands

✍ Scribed by R.A. Bannai; G. Duxbury; G. Ritchie; S. Klee

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 364 KB
• Volume: 178
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1996.0160

✦ Synopsis

A first full rotational analysis of high-resolution gas-phase spectra of the lowest frequency fundamental bands, n 9 and n 12 , of formaldoxime, CH 2 NOH, has been completed. In addition the weak n 7 fundamental has been analyzed at medium resolution, and the complex structure of the bands in the n 11 and 2n 12 region has been revealed. It is shown that the complexity of the spectrum of the latter region is due to Coriolis interaction between the overtone 2n 12 and the fundamental band n 11 . The region covered in this analysis is from 8 to 30 mm. Since the molecule has C s symmetry, in principle all the bands of A symmetry are AB hybrids. Although the n 4 , n 5 , n 6 , and n 8 fundamental bands described previously are predominantly A-type, the n 7 band is found to be almost a pure B-type band, and the n 9 band to be mainly B-type. The n 11 and n 12 bands are C-type bands. The main results (in cm 01 ) for the excited states are: Band n 0 A B C n 7 1157.28 2 n 9 530.0178 5 2.26675 0 0.39515 1 0.33517 7 n 11 772.78 0 n 12 397.6849 9 2.22267 2 0.39459 3 0.33650 1 2n 12 778.51 7 2.2190 9 0.3927 0 0.3379 0