Far-infrared and Raman Spectra of Crystalline ICN

1971 ◽  
Vol 49 (14) ◽  
pp. 2459-2462 ◽  
Author(s):  
R. Savoie ◽  
M. Pézolet
Keyword(s):  
Raman Spectra ◽  
Infrared Spectra ◽  
High Frequency ◽  
Far Infrared ◽  
Infrared And Raman Spectra ◽  
Infrared Band ◽  
Longitudinal Modes ◽  
Intensity Measurements ◽  
Cyanogen Iodide ◽  
Far Infrared Spectra

The Raman and far-infrared spectra of crystalline cyanogen iodide have been recorded. High-frequency shoulders alongside the Raman bands confirm the piezoelectric nature of this solid and allow an estimate to be made of the frequencies of the longitudinal modes associated to the fundamental vibrations. Dipole derivatives calculated from these frequencies agree qualitatively with those obtained from infrared band intensity measurements.

Far-Infrared and Raman Spectra of Ammonium Fluoride and Ammonium Fluoride—d4

1970 ◽  
Vol 24 (1) ◽  
pp. 16-20 ◽  
Author(s):  
J. R. Durig ◽  
D. J. Antion
Keyword(s):  
Thin Films ◽  
Raman Spectra ◽  
Infrared Spectra ◽  
Low Frequency ◽  
Far Infrared ◽  
Ammonium Fluoride ◽  
Isotopic Shift ◽  
Lattice Vibrations ◽  
Infrared And Raman Spectra ◽  
Far Infrared Spectra

The far-infrared spectra of thin films of NH4F and ND4F and the Raman spectra of polycrystalline samples of both compounds have been recorded at −170°C. Two low-frequency lattice vibrations were observed in each spectrum and these have been assigned as optical translations on the basis of their isotopic shift factors. Librational modes were not observed in any of the spectra.

An infrared and Raman spectroscopic study of some Group 1B halide complexes containing an M4X4 core

1978 ◽  
Vol 31 (10) ◽  
pp. 2137 ◽  
Author(s):  
GA Bowmaker ◽  
RJ Knappstein ◽  
SF Tham
Keyword(s):  
Raman Spectra ◽  
Broad Band ◽  
Low Frequency ◽  
Far Infrared ◽  
Infrared And Raman Spectra ◽  
Intense Band ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
Halide Complexes ◽  
Far Infrared Spectra

The infrared and Raman spectra of [Et3PcuI]4 and [Et3AsCuI]4 have been measured, and bands have been assigned to vibrations of the ligand and of the Td Cu4I4 core. The far-infrared spectra show two strong T2 v(CuI) bands at about 90 and 140 cm-1, the higher frequency member of which has a Raman counterpart which shows possible longitudinal-transverse splitting. The Raman spectra also show an intense band at about 50 cm-1. Similar features have been observed in the low-frequency vibrational spectra of [Et2S]3 [CuI]4, [C5H5NcuI]4, [C5H11NAgI]4, [Et3PAgBr]4 and [Et3PagCl]4, although the last two compounds gave only a single broad band in the v(MX) region.

The Preparation and Low-Frequency Vibrational Spectra of Some Copper(I) and Silver(I) Alkane- and Arene-monothiolate Complexes

1979 ◽  
Vol 32 (7) ◽  
pp. 1443 ◽  
Author(s):  
GA Bowmaker ◽  
L Tan
Keyword(s):  
Raman Spectra ◽  
Infrared Spectra ◽  
Vibrational Spectra ◽  
Low Frequency ◽  
Far Infrared ◽  
New Methods ◽  
Thiolate Complexes ◽  
New Compounds ◽  
First Time ◽  
Far Infrared Spectra

A number of different methods for preparing anionic Group 1B metal thiolate complexes have been investigated. The compounds [Me4N] [CU2(SMe)3] and [Et4N] [Ag5(SBut)6] are reported for the first time, and new methods for preparing the previously known compounds [Et4N] [Cu5(SBut)6], [Me4N]2 [CU5(SPh)7] and [Et4N]2 [Cu5(SPh)7] are described. The far-infrared spectra of the above compounds, and of CuSMe, CuSBut, AgSBut, [Me4N]2 [CU4(SPh)6] and [Me4N]2 [Ag5(SPh)7] have been obtained, and metal-sulfur stretching bands are assigned in the 150-350 cm-1 region. The low-frequency Raman spectra have also been obtained for some of these compounds. Possible structures for the new compounds are considered in the light of the low-frequency vibrational spectra.

Far infrared and Raman spectra of some crystalline halomercurate(II) complexes

1966 ◽  
Vol 19 (9) ◽  
pp. 1603 ◽  
Author(s):  
GB Deacon ◽  
JHS Green ◽  
W Kynaston
Keyword(s):  
Raman Spectra ◽  
Infrared Spectra ◽  
Far Infrared ◽  
Vibrational Frequencies ◽  
Infrared And Raman Spectra

The infrared spectra (500-40 cm-1) of crystalline (Me4N)2HgCl4, Me4NHgCl3, and (Et4As)2HgI4, and the Raman spectra of the first two compounds, have been recorded. Assignments of the vibrational frequencies are made and discussed in relation to the structure of the anions.

Raman and far infrared spectra of s-trinitrobenzene and s-trinitrobenzene-d3

1969 ◽  
Vol 47 (14) ◽  
pp. 2515-2519 ◽  
Author(s):  
H. F. Shurvell ◽  
A. R. Norris ◽  
D. E. Irish
Keyword(s):  
Infrared Spectrum ◽  
Raman Spectra ◽  
Infrared Spectra ◽  
Solid Phase ◽  
Far Infrared ◽  
Far Infrared Spectra

Raman spectra have been recorded of s-trinitrobenzene and s-trinitrobenzene-d3 both in solution and in the solid phase. Eighteen of the 22 Raman active fundamentals in D3h have been observed for both molecules.Two fundamentals have been observed in the far infrared spectrum of each molecule.

scholarly journals Infrared and Raman spectra of liquid and crystalline silicon tetrafluoride

1970 ◽  
Vol 48 (3) ◽  
pp. 410-416 ◽  
Author(s):  
F. Bessette ◽  
A. Cabana ◽  
R. P. Fournier ◽  
R. Savoie
Keyword(s):  
Crystal Structure ◽  
Raman Spectra ◽  
Infrared Spectra ◽  
Reflection Spectrum ◽  
Crystalline Silicon ◽  
Silicon Tetrafluoride ◽  
Infrared And Raman Spectra ◽  
Longitudinal Modes ◽  
Infrared Reflection ◽  
Infrared Reflection Spectrum

The Raman and infrared spectra of liquid and crystalline SiF4 have been recorded. The assignment of some of the Raman bands of the crystal to longitudinal modes has been confirmed by the infrared reflection spectrum. These indicate that the crystal structure is not centrosymmetric. In other respects the spectra are also more complicated than is expected on the basis of the previously reported Td3 structure. Possible explanations are discussed.

Photoacoustic infrared spectra (250–10 000 cm−1) of partially deuterated kaolinite #9

1987 ◽  
Vol 65 (6) ◽  
pp. 1420-1423 ◽  
Author(s):  
K. H. Mlchaelian ◽  
K. Bukka ◽  
D. N. S. Permann
Keyword(s):  
Raman Spectra ◽  
Infrared Spectra ◽  
Infrared And Raman Spectra ◽  
Infrared Band ◽  
Surface Hydroxyl ◽  
Inner Surface ◽  
Stretching Vibrations

Partial deuteration of kaolinite #9 was accomplished by grinding lumps to a size of 9 μm and refluxing a D2O suspension for periods ranging from 8 to 146 h. Photoacoustic infrared spectra were obtained and compared with previously published infrared and Raman spectra of undeuterated kaolinite and with infrared spectra of deuterated kaolinite. Data from this investigation indicate an extent of deuteration of about 20%; with the exception of the OD stretching bands near 2700 cm−1, most of the bands observed are attributable to undeuterated kaolinite. The infrared band at 2718 cm−1, which was previously assigned to uncoupled inner surface OD stretching, is the analogue of the 3684 cm−1 band observed in Raman and photoacoustic infrared spectra of undeuterated kaolinite. The results support assignment of the 3684 cm−1 band to uncoupled inner surface hydroxyl stretching vibrations.

The Infrared and Raman Spectra of Powdered and Single-Crystal Barium Chlorate Monohydrate and -deuterate

1973 ◽  
Vol 51 (14) ◽  
pp. 2275-2289 ◽  
Author(s):  
John E. Bertie ◽  
Anton M. Heyns ◽  
Oscar Oehler
Keyword(s):  
Water Vapor ◽  
Single Crystal ◽  
Raman Spectra ◽  
Far Infrared ◽  
Interaction Constant ◽  
Water Molecules ◽  
Infrared And Raman Spectra ◽  
Harmonic Force ◽  
Bending Modes ◽  
Far Infrared Spectra

The infrared and Raman spectra of polycrystalline and single-crystal Ba(ClO3)2•H2O and Ba(ClO3)2•D2O have been obtained. The observed bands have been assigned to the various Davydov components of the intramolecular modes and colattice modes. For the water molecule, all of the fundamentals of H2O, HDO, and D2O have been located, the anharmonicities of the bending modes have been determined, and those of the stretching modes are essentially the same as for water vapor. The intermolecular coupling is very weak. The effective harmonic force field for the water molecules has been calculated. The stretch–stretch interaction constant is much smaller than for water vapor, reflecting a smaller separation of the asymmetric and symmetric stretching modes. The intermolecular vibrations of the water molecules have been located. For the chlorate ions, in spite of the disorder due to the 37Cl, the spectra can be interpreted in terms of unit cell modes, albeit as a first approximation. The isotope shift of the symmetric Cl—O stretching mode appears to be unusually large. The far-infrared spectra have been tentatively assigned to translational and rotational vibrations involving the Ba2+ and ClO3− ions.

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