Raman spectra of mercury(I) and mercury(II) iodides in the solid state

1968 ◽  
Vol 21 (9) ◽  
pp. 2145 ◽  
Author(s):  
RPJ Cooney ◽  
JR Hall ◽  
MA Hooper
Keyword(s):  
Raman Spectrum ◽  
Solid State ◽  
Raman Spectra ◽  
Factor Group ◽  
Force Constants ◽  
Unit Cells

The Raman spectrum of yellow Hg2I2 contains features at 110 and 192 cm-l assignable to Hg-Hg stretching and Hg-1 stretching respectively. The spectrum of yellow HgI2 at c. 150� shows bands at 33 cm-1 (I-Hg-1 bending) and 133 cm-1 (Hg-I stretching). The Raman shifts for red HgI2 are 24, 111, and 137 cm-l, attributable to I-Hg-1 bending, symmetric and asymmetric Hg-1 stretching respectively. Assignments are made on the basis of factor group analyses on the Bravais unit cells. Some force constants are calculated.

The Raman Spectra of some Tricoordinate Halogenocadmate(II) Anions in the Solid State

1975 ◽  
Vol 53 (22) ◽  
pp. 3487-3491 ◽  
Author(s):  
J. Guillermo Contreras ◽  
Dennis G. Tuck
Keyword(s):  
Solid State ◽  
Raman Spectra ◽  
Force Constants ◽  
State Force

The Raman spectra of the solids n-Pr4N[CdX3], where X is Cl, Br, or I, show that trihalogenocadmate anions possess C2v symmetry in the solid state. Force constants have been calculated using the Urey–Bradley approximation and are correlated with the values reported for other tricoordinate species.

scholarly journals Synthesis and Raman spectra of K-Ca double carbonates: K2Ca(CO3)2 bütschliite, fairchildite, and K2Ca2(CO3)3 at 1 ATM

2019 ◽  
Vol 64 (9) ◽  
pp. 967-973
Author(s):  
A. V. Arefiev ◽  
I. V. Podborodnikov ◽  
A. F. Shatskiy ◽  
K. D. Litasov
Keyword(s):  
Raman Spectroscopy ◽  
Raman Spectrum ◽  
High Temperature ◽  
Solid State ◽  
Raman Spectra ◽  
Solid State Reaction ◽  
Atmospheric Pressure ◽  
Intense Band ◽  
Temperature Modification ◽  
High Temperature Modification

Here we present results on synthesis of double K-Ca carbonates at atmospheric pressure in closed graphite capsules. The mixtures of K2CO3 and CaCO3 corresponding to stoichiometry of K2Ca(CO3)2 and K2Ca2(CO3)3 were used as starting materials. The low-temperature modification of K2Ca(CO3)2 was synthesized by a solid-state reaction at 500°C during 96 h. The high-temperature modification of K2Ca(CO3)2 as well as the K2Ca2(CO3)3 compound were synthesized both by a solid-state reaction at 600°C during 72 h and during cooling of the melt from 830 to 650°C for 30 min. The obtained carbonates were studied by Raman spectroscopy. The Raman spectrum of bütschliite is characterized by the presence of an intense band at 1093 cm-1 and several bands at 1402, 883, 826, 640, 694, 225, 167 and 68 сm-1. The Raman spectrum of fairchildite has characteristic intense bands at 1077 and 1063 cm-1, and several bands at 1760, 1739, 719, 704, 167, 100 сm-1. In the Raman spectrum of K2Ca2(СO3)3 intense bands at 1078 and 1076 cm-1 and several bands at 1765, 1763, 1487, 1470, 1455, 1435, 1402, 711, 705, 234, 221, 167, 125 and 101 сm-1 were found. The collected Raman spectra can be used to identify carbonate phases entrapped as microinclusions in phenocrysts and xenoliths from kimberlites and other alkaline rocks.

Schwingungsspektren der Tetraphosphortetrasulfide

1981 ◽  
Vol 36 (8) ◽  
pp. 842-845 ◽  
Author(s):  
W. Bues ◽  
M. Somer ◽  
W. Brockner
Keyword(s):  
Raman Spectrum ◽  
Solid State ◽  
Raman Spectra

Abstract The solid-state i.r. and Raman spectra of the crystalline tetraphosphorus tetrasulphides -α -P4S4 and β-P4S4 - and the Raman spectrum of the α-P4S4 melt have been recorded. The observed frequencies of α-P4S4 were tentatively assigned to P4S4 molecules of the cradle type, possessing D2d symmetry. An assignment of the β-P4S4 frequencies to a cage-like P4S4 unit with Cs symmetry is proposed and based on comparison with similar P-S-compounds such as P4S3 and α-P4S5. All the tetraphosphorus tetrasulphides decompose during melting into P4S3, P4S7 and β-P4S6.

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 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.

The Raman spectra of tricoordinate CdX2Y− halogenocadmate(II) anions in the solid state

1976 ◽  
Vol 54 (23) ◽  
pp. 3641-3645 ◽  
Author(s):  
J. Guillermo Contreras ◽  
Dennis G. Tuck
Keyword(s):  
Solid State ◽  
Raman Spectra ◽  
Force Constants ◽  
Anionic Complexes ◽  
State Force

Anionic complexes of cadmium, of the type [CdX2Y]−, where X and Y are chlorine, bromine or iodine, have been prepared as the tetra-n-propylammonium salts. Raman spectra have been recorded, and serve to establish that these anions have C2v symmetry in the solid state. Force constants calculated on the Urey–Bradley approximation are correlated with previously reported results for CdX3− species.

Normalschwingungen und Rotationsisomerie von Polysulfidionen S2-n(n=4 - 8) / Fundamental Vibrations and Rotational Isomers of Polysulfide Anions, Sn2- (n = 4 - 8)

1977 ◽  
Vol 32 (11) ◽  
pp. 1313-1319 ◽  
Author(s):  
Ralf Steudel ◽  
Fritz Schuster
Keyword(s):  
Raman Spectrum ◽  
Force Field ◽  
Raman Spectra ◽  
Force Constants ◽  
Rotational Isomers

Abstract Raman spectra of (NH4)2S5 and S4Cl2 (dichlorotetrasulfane) have been recorded, and force constants have been calculated for the pentasulfide ion using an extended Urey-Bradley force field with six independent force constants. K2S5 like (NH4)2S5 is shown to contain helical S52-(symmetry C2) but Na2S5 consists of cis-S52-of symmetry C5. The force constants of S42- and S52- agree well with those of S8 and have been used to calculate the fundamental vibrations of S62-) S72-, and S82- in different isomeric rotational conformations. The Raman spectrum of S4Cl2 is compared with the vibrations calculated for isoelectronic S62-.

Vibration spectra of sulphur tetranitride

1981 ◽  
Vol 46 (11) ◽  
pp. 2613-2619 ◽  
Author(s):  
Jiří Toužín
Keyword(s):  
Solid State ◽  
Raman Spectra ◽  
Normal Coordinate Analysis ◽  
Infrared And Raman Spectra ◽  
Normal Coordinate ◽  
Vibration Spectra

Available data on infrared and Raman spectra of S4N4 in solid state and solutions have been verified and completed. On the basis of normal coordinate analysis an attempt has been made to define with more precision the interpretation of vibration spectra of this compound given in earlier reports.

Vibrational spectra of aquadioxotetra; peroxodivanadates(V) M2[V2O2(O2)4(H2O)]·xH2O (M = N(CH3)4, Cs)

1990 ◽  
Vol 55 (6) ◽  
pp. 1485-1490 ◽  
Author(s):  
Peter Schwendt ◽  
Milan Sýkora
Keyword(s):  
Raman Spectra ◽  
Vibrational Spectra ◽  
Normal Coordinate Analysis ◽  
Force Constants ◽  
Infrared And Raman Spectra ◽  
Empirical Correlations ◽  
Normal Coordinate ◽  
Bond Lengths ◽  
Stretching Vibrations

The infrared and Raman spectra of M2[V2O2(O2)4(H2O)]·xH2O and M2[V2O2(O2)4(D2O)]·xD2O (M = N(CH3)4, Cs) were measured. In the region of the vanadium-oxygen stretching vibrations, the spectra were interpreted based on normal coordinate analysis, employing empirical correlations between the bond lengths and force constants.

RAMAN SPECTRA OF TITANIUM DI-, TRI-, AND TETRA-CHLORIDES

2001 ◽  
Vol 15 (28n30) ◽  
pp. 3865-3868 ◽  
Author(s):  
H. MIYAOKA ◽  
T. KUZE ◽  
H. SANO ◽  
H. MORI ◽  
G. MIZUTANI ◽  
...  
Keyword(s):  
Force Constant ◽  
Raman Spectra ◽  
Normal Mode ◽  
Raman Band ◽  
Normal Mode Analysis ◽  
Force Constants ◽  
Mode Analysis ◽  
Oxidation Number

We have obtained the Raman spectra of TiCl n (n= 2, 3, and 4). Assignments of the observed Raman bands were made by a normal mode analysis. The force constants were determined from the observed Raman band frequencies. We have found that the Ti-Cl stretching force constant increases as the oxidation number of the Ti species increases.

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