کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5415517 | 1393761 | 2008 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The high-resolution infrared spectrum of pyrrole between 900 and 1500Â cmâ1 revisited
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The Fourier transform gas-phase infrared spectrum of pyrrole, C4H5N, has been recorded with a resolution of ca. 0.003 cmâ1 in the 900-1500 cmâ1 spectral region. Four fundamental bands, ν8(A1; 1016.9 cmâ1), ν23(B2; 1049.1 cmâ1), ν7(A1; 1074.6 cmâ1), ν20(B2; 1424.4 cmâ1) and the overtone band 2ν16(A1; 962.7 cmâ1) have been analysed using the Watson model. The ν8 and 2ν16 bands are unperturbed; the ν7 and ν23 bands are locally perturbed, while the ν20 band is globally perturbed by weak c-Coriolis resonance. Upper state vibrational term values, and rotational and centrifugal distortion constants, have been obtained from fits using S-reduction and Ir-representation as well as A-reduction and IIIr-representation. A set of ground state rotational and centrifugal distortion constants using A-reduction was obtained from a simultaneous fit of ground state combination differences from all five bands and previous microwave and millimetre-wave data.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Spectroscopy - Volume 252, Issue 1, November 2008, Pages 93-97
Journal: Journal of Molecular Spectroscopy - Volume 252, Issue 1, November 2008, Pages 93-97
نویسندگان
F. Hegelund, R. Wugt Larsen, M.H. Palmer,