ZfN: Search Results

1	Author	Wolfram Bodenmüller, Andreas Ruoff, Laurent Manceron	Requires cookie*
	Title	FTIR Study of the v 12 and the v 12 + v 14 — v 14 Bands of 1,3,5-Triazine Near 740 cm -1
	Abstract	The infrared spectrum of the v 12 fundamental and its accompanying hot band v 12 + v 14 — v 14 of triazine has been measured by means of a Fourier transform spectrometer with a resolution of about 0.0023 cm" 1 . A total of about 2779 rovibrational transitions has been assigned. The ground state constants have been considerably improved whilst the parameters for the excited states tf 12 =l, i; 14 = l and tf 12 =i> 14 = l have been obtained for the first time. The standard deviations were 2.92 • 10" 4 cm" 1 for the ground state constants and 1.53 • 10" 4 cm 1 for the excited state parame-ters of v 12 showing the latter to be unperturbed. The upper state of the hot band v 12 + v 14 — v 14 was found to be perturbed by an accidental resonance.
	Reference	Z. Naturforsch. 47a, 1197—1203 (1992); received October 20 1992
	Published	1992
	Keywords	1, 3, 5-triazine, High resolution FTIR spectroscopy, Ground state constants Funda-mental constants, Hot band constants
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	TEI-XML for	default:Reihe_A/47/ZNA-1992-47a-1197.pdf
	Identifier	ZNA-1992-47a-1197
	Volume	47

2	Author	H. Zerbe-Foese, A. Guarnieri, O. L. Stiefvater	Requires cookie*
	Title	Microwave and Millimeterwave Spectrum of 1,1-Difluoroethylene and the Vibrational Mode v 10 from FT-IR Spectroscopy
	Abstract	Pure rotational spectra of 1,1-Difluoroethylene (1,1-DFE) in the vibrational ground state (GS) and in excited vibrational states (EVSs) have been investigated by double resonance modulation (DRM) microwave spectroscopy in the range from 12 GHz to 40 GHz, and by millimeterwave spectroscopy in the range from 90 to 260 GHz. In addition to the GS spectrum, rotational transitions have been observed for the EVSs v 10 = l, and 2, v 12 = l, v 6 = l, v n = l, v 4 = l, and v 9 = l. Along with other IR bands up to 1400cm" 1 , the fundamental vibrational band v 10 = l <-0 has been observed by FT-IR spectroscopy and has been analysed to yield v° 0 = 436.8851 cm -1 . Rotational constants and quartic distortion constants were deduced for all observed states. In addition, sextic distortion constants were obtained for the GS and for the EVSs v 10 = l, 2, v 6 = l, and v 12 = l by computer fits of combined microwave and millimeterwave data to Watson's A-re-duced Hamiltonian in I r representation. The S-reduced Hamiltonian in III r representation may be considered more appropriate for the calculation or the fitting of the transitions because 1,1-DFE is a near oblate asymmetric top. Thus, for comparison, results are given for both the A-and the S-reduction.
	Reference	Z. Naturforsch. 51a, 53—62 (1996); received November 11 1995
	Published	1996
	Keywords	1, 1-Difluoroethylene, Molecular Spectroscopy, Microwave Spectroscopy, FT-IR Spec-troscopy, Excited Vibration States
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	TEI-XML for	default:Reihe_A/51/ZNA-1996-51a-0053.pdf
	Identifier	ZNA-1996-51a-0053
	Volume	51

3	Author	W. Bodenmüller, M. Pfeffer, R. Ruber, B. Macht, A. Ruoff	Requires cookie*
	Title	High Resolution FTIR Spectroscopy of 1,3>5-Triazine*: The Parallel Bands v n and v 12 of 12 C 3 14 N 3 H 3 , 13 C 3 14 N 3 H 3 , 12 C 3 15 N 3 H 3 , 13 C 3 15 N 3 H 3 and 12 C 3 14 N 3 D 3
	Abstract	The present contribution reports on the analysis of the high resolution FTIR spectra of the only two IR-active parallel fundamentals v u and v 12 of the isotopomers 12 C 3 14 N 3 H 3 , 13 C 3 14 N 3 H 3 , 12 C 3 15 N 3 H 3 , C 3 15 N 3 H 3 and 12 C 3 14 N 3 D 3 , respectively, of 1,3,5-triazine. The molecular con-stants of the ground state and the upper states u u = l and v l2 = \, respectively, for all molecules under consideration are listed. The enhancement of the P-and the depletion of the R-banches, observed in the v n bands of all non-deuterated isotopomers, is discussed, and the Herman-Wallis constants obtained are given.
	Reference	Z. Naturforsch. 53a, 1 (1998); received December 10 1997
	Published	1998
	Keywords	High Resolution FTIR Spectroscopy, 1, 3, 5-Triazine, Parallel Band, Herman-Wallis Constants
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	TEI-XML for	default:Reihe_A/53/ZNA-1998-53a-0001.pdf
	Identifier	ZNA-1998-53a-0001
	Volume	53