Laser Raman Spectra and Normal Coordinate Analysis of Some Uranyl Tetrachloride Complexes

1980 ◽  
Vol 34 (3) ◽  
pp. 327-331 ◽  
Author(s):  
Ken Ohwada
Keyword(s):  
Raman Spectra ◽  
Point Group ◽  
Normal Coordinate Analysis ◽  
Force Constants ◽  
Normal Coordinate ◽  
Magic Formula ◽  
Vibrational Assignments ◽  
Laser Raman ◽  
Laser Raman Spectra ◽  
Group D

Laser Raman spectra of uranyl tetrachloride complexes [K2UO2Cl4, Rb2UO2Cl4, Cs2UO2Cl4, (NH4)2UO2Cl4] have been measured in the region from 3500 to 10 cm−1. Vibrational assignments as well as normal coordinate analyses have been carried out with the assumption that all the complexes contain discrete (UO2Cl4)2− ions belonging to a point group D4h. To understand the nature of the uranyl bonds in the complexes, approximate π-bonding energies of such bonds have been estimated from the U—O stretching force constants. The reliability of the values obtained are discussed in detail on the basis of Mulliken's magic formula.

Matrix Infrared and Laser Raman Spectra, Molecular Structures and Normal Coordinate Analyses of Germanium Difluoride, Monomer GeF2, and Dimer (GeF2)2

1974 ◽  
Vol 52 (1) ◽  
pp. 95-99 ◽  
Author(s):  
H. Huber ◽  
E. P. Kündig ◽  
G. A. Ozin ◽  
A. Vander Voet
Keyword(s):  
Force Field ◽  
Raman Spectra ◽  
Normal Coordinate Analysis ◽  
Molecular Structures ◽  
Planar Structure ◽  
Normal Coordinate ◽  
Warm Up ◽  
Laser Raman ◽  
Laser Raman Spectra

Matrix infrared and laser Raman spectra are reported for GeF2 and (GeF2)2 in both N2 and Ar matrices. Raman depolarization measurements for the monomer in N2 matrices identify ν1 at 653 cm−1. Warm-up experiments identify infrared and Raman lines at 665, 478 cm−1 and 669, 465, and 424 cm−1 respectively, with the first stage of the polymerization of GeF2 monomer and are assigned to GeF stretching modes of the dimer (GeF2)2, having a centrosymmetric C2h, non-planar structure, containing a double fluorine bridge similar to the structure proposed for (SeO2)2. A normal coordinate analysis is performed on the dimer using a force field transferred from the monomer. The results provide additional evidence for the correctness of the vibrational and stereochemical assignments for the dimer.

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.

Vibrational Assignments of Organosilanetriols. II. Crystalline Phenylsilanetriol and Phenylsilanetriol-D3

1978 ◽  
Vol 32 (5) ◽  
pp. 469-479 ◽  
Author(s):  
H. Ishida ◽  
J. L. Koenig
Keyword(s):  
Fourier Transform ◽  
Raman Spectra ◽  
Vibrational Modes ◽  
Torsional Mode ◽  
Vibrational Assignments ◽  
Laser Raman ◽  
Sioh Group ◽  
Laser Raman Spectra ◽  
Out Of Plane ◽  
Bending Modes

Fourier transform infrared spectra (3800 to 450 cm−1) and laser Raman spectra (4000 to 0 cm−1) of crystalline phenylsilanetriol and phenylsilanetriol-d3, and liquid state phenylsilanetriol and phenylsilanetriol-d3 are first reported. Complete band assignments are attempted. All vibrational modes of the SiOH group except for the SiC torsional mode, including the SiOH in-plane and out-of-plane bending modes, are observed. In addition to the phenylsilanetriols, infrared and laser Raman spectra of crystalline diphenylsilanediol and triphenylsilanol are also studied to aid the band assignments.

Die Schwingungsspektren von μ-Οxο- und μ-Nitridokomplexen des Rutheniums and Rheniums / Vibrational Spectra of μ-Oxo and µ-Nitrido Complexes of Ruthenium and Rhenium

1975 ◽  
Vol 30 (3-4) ◽  
pp. 210-214 ◽  
Author(s):  
Rainer Mattes ◽  
Mohamed Moumen ◽  
Ingeborg Pernoll
Keyword(s):  
Raman Spectra ◽  
Vibrational Spectra ◽  
Normal Coordinate Analysis ◽  
Force Constants ◽  
Infrared And Raman Spectra ◽  
Normal Coordinate ◽  
Nitrido Complexes ◽  
Tetramethylammonium Salts

The infrared and Raman spectra of potassium and tetramethylammonium salts of the dinuclear anions M2OX104- and M2NX8(H2O)23-, with M=Ru, Re and X=Cl, Br, have been registered and assigned on the basis of a normal coordinate analysis. The totally symmetric vibrations νsΜ2Ο (νsM2N), νsMXa,x(νsM—OH2) and δsOMX (δsNMX) show considerable mixing. The force constants of the bridge bonds are 3.9 mdyn/Å for the μ-oxo-and 5.1 mdyn/Å for the μ-nitrido-compounds, the respective stretch-stretch interaction constants 0.45 and 0.6 mdyn/Å.

Darstellung und Charakterisierung von Dekachlorodiiridat(IV), [Ir2Cl10]2-, und Normalkoordinatenanalyse an Dioktaederkomplexen des Typs [M2X10]2-, M = Re, Os, Ir, Pt; X = Cl, Br / Preparation and Characterization of Decachlorodiiridate(IV), [Ir2Cl10]2-, and Normal Coordinate Analysis of Bioctahedral Complexes [M2X10]2-, M = Re, Os, Ir, Pt; X = Cl, Br

1992 ◽  
Vol 47 (8) ◽  
pp. 1115-1118 ◽  
Author(s):  
P. Hollmann ◽  
W. Preetz
Keyword(s):  
Raman Spectra ◽  
Point Group ◽  
Ir And Raman Spectra ◽  
Normal Coordinate ◽  
Bridging Ligands ◽  
Valence Force ◽  
Group D ◽  
Ir And Raman ◽  
Good Agreement

On heating the tetraethylammonium salt of [IrCl6]2- with trifluoroacetic acid the edge sharing bioctahedral anion [Ir2Cl10]2- is formed, the IR and Raman spectra of which are assigned according to point group D2h. Normal coordinate analyses, based on a general valence force field, for [M2X10]2-, M = Re, Os, Ir, Pt; X = Cl, Br have been performed, resulting in a good agreement of the calculated frequencies with the bands observed in the IR and Raman spectra. Due to the stronger bonding of the terminal as compared to the bridging ligands, the valence force constants fd(MXt) are significantly higher than fd(MXb).

The vibrational spectrum and normal coordinate analysis of tellurium chloride pentafluoride

1976 ◽  
Vol 54 (5) ◽  
pp. 817-823 ◽  
Author(s):  
W. V. F. Brooks ◽  
M. Eshaque ◽  
Clement Lau ◽  
Jack Passmore
Keyword(s):  
Vibrational Spectrum ◽  
Raman Spectra ◽  
Normal Coordinate Analysis ◽  
Force Constants ◽  
Infrared And Raman Spectra ◽  
Normal Coordinate

The infrared and Raman spectra of TeClF5 have been recorded. Assignments have been made on the basis of C4v symmetry. A normal coordinate analysis was carried out on SClF5, SeClF5, TeClF5, SF6, SeF6, and TeF6 and the derived force constants compared.

Über die Koordinationspolymeren M(II)[Pt(CN)6], II Schwingungsspektren und Kraftkonstanten / Coordination Polymers M(II)[Pt(CN)6], II Vibrational Spectra and Force Constants

1975 ◽  
Vol 30 (9-10) ◽  
pp. 669-676 ◽  
Author(s):  
Hans Siebert ◽  
Manfred Weise
Keyword(s):  
Ir Spectra ◽  
Force Constant ◽  
Raman Spectra ◽  
Coordination Polymers ◽  
Vibrational Spectra ◽  
Normal Modes ◽  
Normal Coordinate Analysis ◽  
Force Constants ◽  
Ligand Field ◽  
Normal Coordinate

The IR spectra (33-4000 cm-1) and the RAMAN spectra (0-2500 cm-1) of the complexes M(II)[Pt(CN)6] (M = Mg, Ca, Cr, Mn, Fe, Co, Ni, Cu, Zn, Cd) have been recorded. In the region 33-300 cm-1, the IR spectra of the isotopic compounds with 64Zn and 68Zn68Zn and with 58Ni and 62Ni have been obtained. The observed frequencies are assigned to the normal modes of the lattices.A normal coordinate analysis has been carried out for the above coordination polymers. The force constants of the Pt(CN)6 moiety are with one exception identical with those obtained for the isolated ion. The CN valency force constant is slightly shifted to higher values. The valency force constants of the coordinative bonds M(II)-N are in the range 0,1-1 mdyn/Å. This variability is considered to stem primarly from ligand field effects.

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