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1.
The high resolution infrared spectrum of the mono-isotopic species F35Cl16O3 has been studied in the region of the 2ν4 overtone, from 2560 to 2680 cm−1. The perpendicular component is strong and clearly observed while the parallel component is very weak and almost completely hidden by the perpendicular one. Their origins differ by 12.6 cm−1, the being located at higher wavenumbers. The band is perturbed by the anharmonic interaction between the v4 = 2, l4 = ?2 and v2 = v4 = v5 = 1, l4 = l5 = ±1 excited states, both of E symmetry. In total 3157 transitions have been assigned, 83% of these to , 12% to , and 5% to . The three bands have been analyzed simultaneously, taking into account the Fermi resonance effective between the excited states of E symmetry. The ro-vibration parameters of the excited states have been obtained, including the deperturbed band origins of and , at 2628.5890(4) and 2619.3342(5) cm−1, respectively. The W245 anharmonic constant is equal to 4.0161(4) cm−1. The x44+g44 and x24+x45+g45 anharmonicity constants have been derived from the obtained band origins and those of ν4 and ν2 + ν5. 相似文献
2.
M. Carlotti G. di Lonardo G. Galloni A. Trombetti 《Journal of Molecular Spectroscopy》1976,62(2):192-200
The infrared absorption of HNCO has been measured in the region of the NH stretching fundamental and in that of the second overtone. The results for the excited states are (in cm?1):
Band | B | C | ||||
3533.1 | 27.0 | — | — | |||
10145.79 | 22.6713 | 0.368426 | 0.361722 |
CD379Br | CD381Br | |||||
991.396 82 (18) | 991.388 46 (17) | cm?1 | ||||
1055.469 00 (12) | 1055.466 32 (12) | cm?1 | ||||
1.830 42 (52) | 1.829 84 (47) | D | ||||
1.829 93 (48) | 1.829 57 (46) | D | ||||
1.832 23 (60) | 1.831 19 (56) | D |
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