期刊
JOURNAL OF MOLECULAR SPECTROSCOPY
卷 203, 期 2, 页码 310-313出版社
ACADEMIC PRESS INC
DOI: 10.1006/jmsp.2000.8189
关键词
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The infrared spectrum of the nu(12) fundamental band of ethylene (C2H4) has been measured with an unapodized resolution of 0.004 cm(-1) in the frequency range of 1380-1500 cm(-1) using the Fourier transform technique. By assigning and fitting a total of 1387 infrared transitions using a Watson's A-reduced Hamiltonian in the I-r representation, rovibrational constants for the upper state (nu(12) = 1) up to five quartic and three sextic centrifugal distortions terms were derived. They represent the most accurate constants for the band so far. The rms deviation of the fit was 0.00033 cm(-1). The: A-type nu(12) band with a band center at 1442.44299 +/- 0.00003 cm(-1) was found to be relatively free from local frequency perturbations. The inertial defect Delta(12) was found to be 0.24201 +/- 0.00002 u Angstrom(2). (C) 2000 Academic Press.
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