The Infrared and Raman Spectra of Trifluoronitrosomethane

The infrared spectrum of gaseous CF3NO has been studied in the region 4000–35 cm−1. The infrared spectrum of the condensed phase has also been recorded and a complete vibrational assignment is proposed. Attempts to record the Raman spectrum have been hampered by photolysis. A frequency of 50 cm−1 for the CF3 torsional mode has been estimated from combination and hot bands. This corresponds to a barrier to internal rotation of approximately 425 cal/mol (150 cm−1). A normal coordinate analysis has been carried out and potential energy distributions, and valence and symmetry force constants are reported.

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THE INFRARED AND RAMAN SPECTRA OF DISULPHUR DECAFLUORIDE (S2F10)

Canadian Journal of Chemistry ◽

10.1139/v57-029 ◽

1957 ◽

Vol 35 (3) ◽

pp. 191-201 ◽

Cited By ~ 32

Author(s):

J. K. Wilmshurst ◽

H. J. Bernstein

Keyword(s):

Raman Spectrum ◽

Infrared Spectrum ◽

Potential Energy ◽

Liquid Nitrogen ◽

Potential Barrier ◽

Energy Calculation ◽

Infrared And Raman Spectra ◽

Vibrational Assignment ◽

Torsional Frequency ◽

Simple Potential

The infrared spectrum of S2F10 has been obtained for the vapor from 5 to 35 μ and for the solid at liquid nitrogen temperatures from 10 to 24 μ. The Raman spectrum, together with depolarization ratios, was obtained for the liquid. A vibrational assignment has been made consistent with either D4d or D4h, symmetry and all the fundamentals identified except two low FSSF bending frequencies and the inactive torsional frequency. A normal co-ordinate calculation located the bending frequencies at 37 and 57 cm.−1 while a simple potential energy calculation gave a torsional frequency of 89 cm.−1 corresponding to a potential barrier of 2780 cm.−1.

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Spectra and Structure of Silicon-Containing Compounds. X. Infrared and Raman Spectra of Methoxytrimethylsilane and Methoxy-D3-Trimethylsilane

Applied Spectroscopy ◽

10.1366/000370278774331062 ◽

1978 ◽

Vol 32 (5) ◽

pp. 457-462 ◽

Cited By ~ 8

Author(s):

J. R. Durig ◽

B. J. Streusand

Keyword(s):

Solid State ◽

Internal Rotation ◽

Raman Spectra ◽

Strong Mixing ◽

Isotopic Substitution ◽

Infrared And Raman Spectra ◽

Vibrational Assignment ◽

Torsional Mode ◽

Frequency Shifts ◽

Bending Mode

The infrared (20 to 3100 cm−1) and Raman (10 to 3100 cm−1) spectra of gaseous (CH3)3SiOCH3 and (CH3)3SiOCD3 have been recorded. The Raman spectra of both liquids and the infrared and Raman spectra of the “light” compound in the solid state have also been recorded. A vibrational assignment based upon depolarization ratios, frequency shifts with isotopic substitution, and group frequencies is proposed. The Si—O torsional mode was observed at 67 cm−1 which gives a barrier to internal rotation of 1.02 kcal/mol. Strong mixing of the Si—O—C bending mode with the C—Si—C bends is proposed. The CH3—O torsion was not observed.

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Schwingungsspektren der Clusterverbindung Nb6F15/Vibrational Spectrum of the Cluster Compound Nb6F15

Zeitschrift für Naturforschung B ◽

10.1515/znb-1989-0117 ◽

1989 ◽

Vol 44 (1) ◽

pp. 74-78 ◽

Cited By ~ 7

Author(s):

G. Kliche ◽

H. G. von Schnering

Keyword(s):

Raman Spectrum ◽

Infrared Spectrum ◽

Vibrational Spectrum ◽

Raman Spectra ◽

Metal Cluster ◽

Cluster Compound ◽

Vibrational Modes ◽

Infrared And Raman Spectra ◽

Normal Coordinate ◽

Valence Force

Abstract Infrared and Raman spectra of the metal cluster compound [Nb6F12]F3 (cubic Im3̄m; Z = 2) are reported. The three intense m odes observed in the Raman spectrum at 215. 267, and 337 cm-1 and a weak mode observed in the infrared spectrum at 287 cm-1 are assigned to the T2g, Eg, A1g, and T1u vibrational modes of the Nb6 octahedra. The assignment is supported by normal coordinate analysis and Raman measurements at 47 kbar. The valence force constants are f(Nb-Fi) = 2.04, f(Nb-Fa-a) = 1.30 and f(Nb-Nb) = 0.97 N cm-1 metal-to-metal interaction in the cluster.

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