The Gas Phase Raman Spectrum and Molecular Structure of Dichlorodibromotellurium(IV) TeCl2Br2. Novel Penta- and Hexa-co-ordinate Mixed Halide Anions of Tellurium(IV). Synthesis and infrared and Raman Spectra of [Et4N]TeCl2Br3 and [Et4N]2TeCl2Br4

1971 ◽  
Vol 49 (5) ◽  
pp. 704-708 ◽  
Author(s):  
G. A. Ozin ◽  
A. Vander Voet
Keyword(s):  
Molecular Structure ◽  
Raman Spectrum ◽  
Gas Phase ◽  
Raman Spectra ◽  
Infrared And Raman Spectra ◽  
Synthetic Route ◽  
Halide Anions ◽  
Phase Data ◽  
First Time

The Raman spectrum of gaseous TeCl2Br2 at 310 °C is reported for the first time. The gas phase data is consistent with the presence of a monomolecular species haying C1 symmetry. A synthetic route for the preparation of penta- and hexa-co-ordinate mixed halide anions of tellurium(IV), under anhydrous conditions, is described for the first time. The infrared and Raman spectra for solid [Et4N]TeCl2Br3 and [Et4N]2TeCl2Br4 are reported. A stereochemistry based on a square pyramid, is favored for [Et4N]-TeCl2Br3. In the case of [Et4N]2TeCl2Br4 the vibrational data strongly suggests the presence of a cis-octahedral anion, having C2v symmetry.

scholarly journals Darstellung und Eigenschaften von cyclo-Nonaschwefeloxid (S9O) und von cyclo-Dekaschwefeloxid (S10O) [1] / Preparation and Properties of cyclo-Nonasulfuroxide (S9O) and of cyclo-Decasulfuroxide (S10O) [1]

1985 ◽  
Vol 40 (5) ◽  
pp. 594-600 ◽  
Author(s):  
Ralf Steudel ◽  
Torsten Sandow ◽  
Jürgen Steidel
Keyword(s):  
Acetic Acid ◽  
Raman Spectrum ◽  
Oxygen Atom ◽  
Raman Spectra ◽  
Carbon Disulfide ◽  
Methylene Chloride ◽  
Molar Ratio ◽  
Infrared And Raman Spectra ◽  
Cyclic Molecules ◽  
First Time

Abstract The homocyclic oxides S9O (m.p. 33 °C, dec.) and S10O (m.p. 51 °C, dec.) have been prepared by oxidation of the corresponding sulfur rings S9 and S10 , respectively, by trifluoroperoxy acetic acid (molar ratio 1:2-3) in a carbon disulfide/methylene chloride mixture. According to infrared and Raman spectra, both compounds contain an exocyclic oxygen atom. S9O and S10O decompose at 25 °C to give SO2 and a polysulfuroxide SnO with >10 but both can be stored at -78 °C without decomposition. The SS bond distances are discussed on the basis of the Raman spectra. In addition, the Raman spectrum of solid S9 has been recorded for the first time. It shows that S9 crystallizes as two allotropes (α-and β-S9) both consisting of cyclic molecules of either C1 or C2 symmetry with bond distances of between 203 and 209 pm.

Synthesis, crystal and molecular structure, and vibrational spectra of the complex (COOH)2•2H2O•18-crown-6

1986 ◽  
Vol 64 (1) ◽  
pp. 142-147 ◽  
Author(s):  
Suzanne Deguire ◽  
François Brisse ◽  
Jacques Ouellet ◽  
Rodrigue Savoie
Keyword(s):  
Molecular Structure ◽  
Hydrogen Bonds ◽  
Oxalic Acid ◽  
Raman Spectra ◽  
Vibrational Spectra ◽  
Crystal And Molecular Structure ◽  
Unit Cell ◽  
Infrared And Raman Spectra ◽  
O 18 ◽  
Stoichiometric Complex

A stoichiometric complex of formula (COOH)2•2H2O•18-crown-6 has been obtained from oxalic acid and the macrocyclic polyether 18-crown-6. The crystals of the complex have a monoclinic unit cell and belong to the P21/c space group. The components in the adduct are linked through hydrogen bonds in a polymer-like fashion: -crown–H2O–HOOCCOOH–OH2–crown–, where the oxalic acid molecules are present in two distinct disordered orientations. The infrared and Raman spectra of the complex are also reported and interpreted.

Molecular Structure of (CF3)2PCl3: Infrared and Raman Spectra

1966 ◽  
Vol 44 (7) ◽  
pp. 2686-2692 ◽  
Author(s):  
James E. Griffiths ◽  
Alexander L. Beach
Keyword(s):  
Molecular Structure ◽  
Raman Spectra ◽  
Infrared And Raman Spectra

Theoretical calculations of electronic Raman effects of the NO and O2 molecules

1970 ◽  
Vol 48 (14) ◽  
pp. 1664-1674 ◽  
Author(s):  
D. W. Lepard
Keyword(s):  
Raman Spectrum ◽  
Raman Spectra ◽  
Theoretical Calculations ◽  
Diatomic Molecules ◽  
Wave Functions ◽  
Rotational Structure ◽  
Intermediate Case ◽  
First Time

This paper presents a method for calculating the relative intensities and Raman shifts of the rotational structure in electronic Raman spectra of diatomic molecules. The method is exact in the sense that the wave functions used for the calculations may belong to any intermediate case of Hund's coupling schemes. Using this method, theoretical calculations of the pure rotational and electronic Raman spectrum of NO, and the pure rotational Raman spectrum of O2, are presented. Although a calculated stick spectrum for NO was previously shown by Fast et al., the details of this calculation are given here for the first time.

Equilibrium molecular structure and spectra of 6-methyl-1,5-diazabicyclo[3.1.0]hexane: joint analysis of gas phase electron diffraction, quantum chemistry, and spectroscopic data

2020 ◽  
Vol 22 (39) ◽  
pp. 22477-22492
Author(s):  
Leonid S. Khaikin ◽  
Georgiy G. Ageev ◽  
Anatoliy N. Rykov ◽  
Olga E. Grikina ◽  
Igor F. Shishkov ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Electron Diffraction ◽  
Quantum Chemistry ◽  
Gas Phase ◽  
Vibrational Spectra ◽  
Spectroscopic Data ◽  
Joint Analysis ◽  
Equilibrium Molecular Structure ◽  
First Time ◽  
Gas Phase Electron Diffraction

For the first time, the molecular structure of 6-methyl-1,5-diazabicyclo[3.1.0]hexane was determined and its NMR and vibrational spectra were studied.

Illumination- and Annealing-Induced Changes in the Infrared and Raman Spectra of a-Si:H

2001 ◽  
Vol 664 ◽  
Author(s):  
L.-F. Arsenault ◽  
S. Lebiba ◽  
E. Sacher ◽  
A. Yelon
Keyword(s):  
Raman Spectrum ◽  
Raman Spectra ◽  
Qualitative Agreement ◽  
Raman Signal ◽  
Infrared And Raman Spectra ◽  
Matrix Elements ◽  
Short Term ◽  
Phonon Peak ◽  
Induced Changes ◽  
Ir And Raman

ABSTRACTWe have investigated the changes, produced by light-soaking, in both the IR and Raman responses of the Si-Hn stretching peaks in the 2000-2100 cm−1 range. Our observations of the IR response are in qualitative agreement with those of Kong and co-workers [1]: that is, short-term light soaking produces an increase in the intensity of the signal and a simultaneous shift to lower frequency. In contrast, short-term light soaking decreases the total intensity of the Raman signal in the 2000-2100 cm−1 range, when normalized to the TO phonon peak at about 480 cm−1. In both cases, these modifications are reversed on annealing at 200° C. We suggest that these changes are attributable to alterations in the environments of the Si-Hn bonds, with the resultant transfer of intensity between IR and Raman matrix elements. Details of the evolution of the components of the Raman spectrum in the 2000-2100 cm−1 range are presented, and compared with IR changes in the same range.

Infrared and Raman Spectra of Spiropentane-H8

1972 ◽  
Vol 26 (5) ◽  
pp. 540-542 ◽  
Author(s):  
G. R. Burns ◽  
D. G. McGavin
Keyword(s):  
Low Temperature ◽  
Infrared Spectrum ◽  
Gas Phase ◽  
Raman Spectra ◽  
Infrared Spectra ◽  
Sufficient Information ◽  
Infrared And Raman Spectra ◽  
Calorimetric Data ◽  
Crystalline Films ◽  
Twist Mode

Infrared and Raman spectra have been measured for spiropentane-H8. Raman spectra for the liquid have enabled the b1 species ring twist to be assigned. Previous assignments of this mode were based on calorimetric data and on the assignment of a band in the infrared spectrum to a combination band involving the ring twist mode. Infrared spectra of low temperature crystalline films have provided sufficient information that, when taken with the Raman data and gas phase infrared spectra, we have assignments for all of the fundamental modes.

THE VIBRATIONAL SPECTRA OF SULPHURYL AND THIONYL HALIDES

1961 ◽  
Vol 39 (11) ◽  
pp. 2171-2178 ◽  
Author(s):  
R. J. Gillespie ◽  
E. A. Robinson
Keyword(s):  
Raman Spectrum ◽  
Raman Spectra ◽  
Vibrational Spectra ◽  
Normal Modes ◽  
Infrared And Raman Spectra ◽  
Fundamental Frequencies

New assignments are proposed for the fundamental frequencies of SOF2, SOCl2, SO2Cl2, SO2F2, and SO2FBr, based on new measurements of the Raman spectrum of SO2Cl2 and previous measurements of the infrared and Raman spectra of these molecules. The fundamental frequencies of these molecules are found to be related to each other and to those of similar molecules when the normal modes are described in terms of characteristic vibrations of the SO, SO2, S(Hal), and S(Hal)2 groups.

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