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.

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.

Perfluormethyl-Element-Liganden, XI Die Schwingungsspektren von (CF3)2EMn(CO)5 (E=P, As) / Perfluoromethyl Element Ligands, XI. Vibrational Spectra of (CF3)2EMn(CO)5 (E = P, As)

1975 ◽  
Vol 30 (7-8) ◽  
pp. 539-543 ◽  
Author(s):  
Reinhard Demuth ◽  
Joseph Grobe ◽  
Robert Rau
Keyword(s):  
Liquid Phase ◽  
Force Field ◽  
Gas Phase ◽  
Raman Spectra ◽  
Vibrational Spectra ◽  
Normal Coordinate Analysis ◽  
Ir And Raman Spectra ◽  
Normal Coordinate ◽  
Ir And Raman

The gas phase IR and liquid phase IR and Raman spectra of (CF3)2PMn(CO)5 and (CF3)2AsMn(CO)6 have been recorded. The spectra are assigned on the basis of a normal coordinate analysis using a transferred force field.

scholarly journals The Vibrational Spectra of Silane and Germane Derivatives. Part IV. The Infrared and Raman Spectra of the Iodo(methyl)germanes

1971 ◽  
Vol 49 (18) ◽  
pp. 2931-2936 ◽  
Author(s):  
J. W. Anderson ◽  
G. K. Barker ◽  
J. E. Drake And ◽  
R. T. Hemmings
Keyword(s):  
Force Field ◽  
Raman Spectra ◽  
Vibrational Spectra ◽  
A Priori ◽  
Normal Coordinate Analysis ◽  
Infrared And Raman Spectra ◽  
Normal Coordinate ◽  
Valence Force ◽  
Valence Force Field ◽  
Fundamental Frequencies

The infrared and Raman spectra of the series of iodo(methyl)germanes, CH3GeI3, (CH3)2GeI2, and (CH3)3GeI have been recorded. A normal coordinate analysis based on a modified valence force field confirms the a priori assignments for all of the fundamental frequencies except the torsional modes.

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.

The Infrared and Raman Spectra of Dimethyliodoarsine

1972 ◽  
Vol 50 (16) ◽  
pp. 2691-2696 ◽  
Author(s):  
H. F. Shurvell ◽  
M. R. Gold ◽  
A. R. Norris
Keyword(s):  
Raman Spectra ◽  
Normal Modes ◽  
Infrared And Raman Spectra ◽  
Normal Coordinate ◽  
Laser Raman ◽  
Laser Raman Spectra ◽  
Modes Of Vibration ◽  
Normal Coordinate Calculation

The infrared and laser–Raman spectra of liquid dimethyliodoarsine, (CH3)2AsI, have been recorded. Assignments of the observed frequencies have been made to the 24 normal modes of vibration of the molecule. A normal coordinate calculation has been carried out in support of the assignment.

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.

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