Vibrational spectra of mercury(II) and methylmercury(II) thiocyanates

1969 ◽  
Vol 22 (10) ◽  
pp. 2117 ◽  
Author(s):  
RPJ Cooney ◽  
JR Hall
Keyword(s):  
Raman Spectrum ◽  
Solid State ◽  
Raman Spectra ◽  
Infrared Spectra ◽  
Vibrational Spectra ◽  
Unit Cell ◽  
Infrared And Raman Spectra

The Raman spectra of Hg(SCN)2 in both the solid state and in solution have been recorded and interpreted in conjunction with the infrared spectra. For the solid state the Raman shifts for Hg-S stretching, S-C stretching, and C-N stretching are 270, 721, and 2112 cm-1 respectively. In diglyme solution the corresponding values are 278, 692, and 2139 cm- 1. The infrared and Raman spectra of CH3HgSCN in the solid state do not contain any coincidences which may indicate that the unit cell is centrosymmetric. The Raman spectrum of CH3HgSCN in CH3OH solution shows strong, sharp, polarized lines at 283, 540, 1186, and 2138 cm-1 which are attributed to Hg-S stretching, Hg-C stretching, CH3 deformation, and C-N stretching modes respectively.

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.

Low frequency infrared and Raman spectra of the N,N,N′,N′-tetramethyl-ethylenediamine adducts of the Group IIb dihalides

1970 ◽  
Vol 48 (1) ◽  
pp. 181-184 ◽  
Author(s):  
M. H. Abraham ◽  
F. W. Parrett
Keyword(s):  
Solid State ◽  
Raman Spectra ◽  
Vibrational Spectra ◽  
Low Frequency ◽  
Infrared And Raman Spectra ◽  
Cadmium Complexes ◽  
Mercury Complexes ◽  
Vibrational Bands

A study of the low frequency vibrational spectra of the complexes MX2.TMED (where M = Zn, Cd, Hg; X = Cl, Br, I; TMED = N,N,N′,N′-tetramethylethylenediamine suggests that in the solid state the zinc and mercury complexes are 4-coordinated but the cadmium complexes are all based on octahedral halogen bridged structures. Assignments of the vibrational bands are discussed.

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.

The Vibrational Spectra of VPO5 Crystal Phases and Related Glasses

1977 ◽  
Vol 31 (3) ◽  
pp. 230-236 ◽  
Author(s):  
R. N. Bhargava ◽  
R. A. Condrate
Keyword(s):  
Raman Spectra ◽  
Infrared Spectra ◽  
Vibrational Spectra ◽  
Rayleigh Scattering ◽  
Physical Adsorption ◽  
Group Analysis ◽  
Phosphate Glasses ◽  
Infrared And Raman Spectra ◽  
Vanadium Phosphate ◽  
Space Groups

Infrared and Raman spectra were measured and interpreted for two crystalline VPO5 phases (α- and β-VPO5) and several related vanadium phosphate glasses. The spectral results for the crystalline phases were consistent with those predicted by factor group analysis using the previously determined space groups. Empirical band assignments were made for the observed bands on the basis of the bands observed earlier for related phosphate and oxyvanadium compounds. Also, the band assignments made for the infrared spectra of the glasses were consistent with the assignments for crystalline V2O5 and the two crystalline VPO5 phases. No Raman spectra were observed for the glasses because processes involving adsorption and Rayleigh scattering dominated over Raman scattering. The infrared spectra of vanadium phosphate glasses with high P2O5 concentrations possessed many features resembling those observed in the infrared spectra of α-VPO5, suggesting similarities in the short range order for the two materials. Analyses of the vibrational spectra of hydrated α-VPO5 samples suggests that the water molecules are adsorbed in the interlamellar spaces of the crystals, complexing to vanadium ions. Initial steps in the hydration of vanadium phosphate glasses apparently involve physical adsorption of water on their surfaces. No water adsorption could be detected for β-VPO5 under normal conditions from its infrared and Raman spectra.

Vibrational Spectra of N2H5HC2O4 and N2D5DC2O4

1975 ◽  
Vol 53 (9) ◽  
pp. 1387-1392 ◽  
Author(s):  
R. Savoie ◽  
M. Guay
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
Low Temperature ◽  
Crystal Structures ◽  
Raman Spectra ◽  
Vibrational Spectra ◽  
Unit Cell ◽  
Infrared And Raman Spectra ◽  
Solid Phases ◽  
High Temperature Modification

Infrared and Raman spectra of N2H5HC2O4 and N2D5DC2O4 have been recorded at various temperatures between 77 and 300 K. The results at 300 K are consistent with the known crystal structures of these solids. A phase transition has been detected at ∼ 240 K in N2D5DC2O4 and although there are similarities between the two stable solid phases of this compound, the low-temperature form appears to be centrosymmetric and to have a larger unit cell than the high-temperature modification.

Low-Temperature Infrared and Raman Spectra of Co(CH3COO)2·4X2O (X = H, D)

1984 ◽  
Vol 38 (5) ◽  
pp. 710-714 ◽  
Author(s):  
G. S. Raghuvanshi ◽  
D. P. Khandelwal ◽  
H. D. Bist
Keyword(s):  
Low Temperature ◽  
Raman Spectra ◽  
Water Analysis ◽  
Infrared Spectra ◽  
Unit Cell ◽  
Infrared And Raman Spectra

The infrared spectra (4000–200 cm−1) at 300 K and 95 K, and Raman spectra (4000–40 cm−1) at 300 K and 130 K of the titled compounds are reported A varying degree of deuteration has been used to assign the modes of water Analysis of the spectra confirms the known structure that has one type of acetate ion and two types of water groups in the unit cell H2O(I) retains approximately C2 v symmetry while H2O(II) is distorted to C s

Vibrational spectra and thermodynamic properties of thiazole, 2-aminothiazole, 2-amino-[2H]-thiazole and 2-amino-[2H2]-thiazole

1989 ◽  
Vol 54 (1) ◽  
pp. 28-41 ◽  
Author(s):  
Juan F. Arenas ◽  
Jesús Perez-Peña ◽  
Melchor Gonzalez-Davila
Keyword(s):  
Raman Spectrum ◽  
Thermodynamic Properties ◽  
Infrared Spectra ◽  
Thermodynamic Functions ◽  
Vibrational Spectra ◽  
Solid Phase ◽  
Infrared And Raman Spectra ◽  
Product Rule ◽  
Combination Bands ◽  
Microcrystalline Powder

Infrared and Raman spectra of thiazole have been reinvestigated with new assignments of overtone and combination bands being proposed. Infrared spectra in the solid phase and in different solutions for 2-aminothiazole and 2-amino-[2H2]-thiazole, as well as Raman spectrum of microcrystalline powder for 2-aminothiazole were also studied and a general assignment for all the observed bands have been proposed. The present assignment satisfies the isotopic product rule for i.r. fundamentals. On this basis thermodynamic functions have been computed.

Far Infrared and Raman Spectra of (CH3)3SiCo(CO)4

1971 ◽  
Vol 25 (2) ◽  
pp. 182-186 ◽  
Author(s):  
J. R. Durig ◽  
S. J. Meischen ◽  
S. E. Hannum ◽  
R. R. Hitch ◽  
S. K. Gondal ◽  
...  
Keyword(s):  
Raman Spectrum ◽  
Solid State ◽  
Raman Spectra ◽  
Normal Modes ◽  
Far Infrared ◽  
Static Field ◽  
Infrared And Raman Spectra ◽  
Vibrational Assignment ◽  
Degenerate Modes ◽  
Ir And Raman

The ir spectra of (CH3)3SiCo(CO)4 in the gaseous (4000–250 cm−1) and solid (4000–33 cm−1) phases have been recorded. The Raman spectrum has also been recorded for the solid state. To aid in the assignment, the ir and Raman spectra were recorded of solid (CH3)3SiH. The vibrational assignment for most of the 60 normal modes has been given on the basis of the fundamental vibrations of the –Si(CH3)3 and –Co(CO)4 moities. The static field was sufficiently strong to split the degenerate modes but the correlation field was so weak that no definite splitting of the symmetric modes was detected.

Vibrational Spectra and Normal Coordinate Analysis of Disulfuryl Difluoride S2O5F2 and Diselenonyl Difluoride Se2O5F2

1993 ◽  
Vol 58 (3) ◽  
pp. 517-529 ◽  
Author(s):  
Jiří Toužín ◽  
Miloš Černík
Keyword(s):  
Raman Spectrum ◽  
Force Field ◽  
Raman Spectra ◽  
Infrared Spectra ◽  
Vibrational Spectra ◽  
Room Temperature ◽  
Normal Coordinate Analysis ◽  
Normal Coordinate ◽  
Valence Force Field ◽  
Overlapping Bands

Raman spectra (1 600 - 100 cm-1) of liquid S2O5F2 and Se2O5F2 and infrared spectra of liquid and gaseous S2O5F2 were measured. A modified general valence force field was used for their interpretation by normal coordinate analysis. Refinement of the number of lines in the Raman spectrum of S2O5F2 by means of numerical separation of the overlapping bands led to the conclusion that liquid S2O5F2 consists at least of three rotamers at room temperature.

Vibrational spectra of ammonium ammine-oxo-diperoxovanadate

1982 ◽  
Vol 47 (6) ◽  
pp. 1549-1555 ◽  
Author(s):  
Peter Schwendt ◽  
Miloslav Pisárčik
Keyword(s):  
Raman Spectrum ◽  
Bond Length ◽  
Raman Spectra ◽  
Vibrational Spectra ◽  
Normal Coordinate Analysis ◽  
Wave Number ◽  
Infrared And Raman Spectra ◽  
Normal Coordinate ◽  
Mass Model ◽  
Vibrational Coupling

Infrared and Raman spectra of solid NH4[VO(O2)2NH3], ND4[VO(O2)2ND3], 14/15NH4[VO(O2)214/15NH3] (about 50% 15N) and Raman spectrum of solution of NH4[VO(O2)2NH3] have been measured. Interpretation of the spectra was complemented by normal coordinate analysis in the approximation of point mass model (NH3). The results have shown that there exists coupling of vibrations of two V(O2) groups, which enables an explanation of differences between spectra of the mono- and diperoxo complexes. The vibrational coupling of VO and OO bonds within one V(O2) group probably causes small sensitivity of wave number of v(O-O) band to changes of d(O-O) bond length.

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