Vibrational Spectra of the Hexacarbonyl Manganese(I) Cation

1974 ◽  
Vol 52 (2) ◽  
pp. 213-215 ◽  
Author(s):  
R. A. N. McLean
Keyword(s):  
Force Constant ◽  
Raman Spectra ◽  
Vibrational Spectra ◽  
Vibrational Frequencies ◽  
Force Constants ◽  
Infrared And Raman Spectra

The infrared and Raman spectra of the hexacarbonylmanganese cation as Mn(CO)6+ PF6− were assigned by comparison with other hexacarbonyl species. The CO stretching force constants for Mn(CO)6+ and Re(CO)6+ as indicated by the CO stretching vibrational frequencies are not significantly different. However, the Mn—C force constant in Mn(CO)6+ is likely to be considerably less than the Cr—C force constant in Cr(CO)6, whereas Re(CO)6+ and W(CO)6 have similar values. It is postulated that, although Mn(CO)6+ has equal metal–carbon σ bonding to Re(CO)6+, the metal-carbon σ bonding is less for Mn(CO)6+.

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.

Schwingungsspektren und Kraftkonstanten der Hexacyano-Komplexe des Mangan(I), Technetium(I) und Rhenium(I) / Vibrational Spectra and Force Constants of the Hexacyano Complexes of Mangan(l), Technicium(I) and Rhenium(l)

1972 ◽  
Vol 27 (8-9) ◽  
pp. 1193-1196 ◽  
Author(s):  
W. Krasser ◽  
K. Schwochau
Keyword(s):  
Force Field ◽  
Raman Spectra ◽  
Vibrational Spectra ◽  
Point Group ◽  
Force Constants ◽  
Irreducible Representations ◽  
Infrared And Raman Spectra ◽  
Valence Force ◽  
Valence Force Field ◽  
Complex Salts

The infrared and Raman spectra of the complex salts K5[Mn(CN)6], K5[Tc(CN)6] and K5[Re(CN)s] have been recorded in the range from 4000 to 40 cm-1. All expected fundamental vibrations have been observed and could be assigned to the irreducible representations of the sym­metry point group Oh . The calculation of the force constants is based on the concept of the generalized valence force field. The low CN-valence force constants indicate the relatively strong Π-bonding character of the metal carbon bond, which is especially pronounced for K5[Tc(CN)6).

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.

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.

Synthesis and vibrational spectra of some lead(II) halide adducts with O-, S-, and N-donor atom ligands

1976 ◽  
Vol 54 (21) ◽  
pp. 3430-3438 ◽  
Author(s):  
Ivor Wharf ◽  
Thor Gramstad ◽  
Ramesh Makhija ◽  
Mario Onyszchuk
Keyword(s):  
Raman Spectra ◽  
Vibrational Spectra ◽  
Vibrational Frequencies ◽  
Infrared And Raman Spectra ◽  
Donor Atom ◽  
Bidentate Ligands ◽  
Experimental Conditions ◽  
Monodentate Ligands

Lead(II) halides (PbX2 where X = Cl, Br, and I) formed five types of adducts with monodentate (L) and bidentate (LL) ligands: PbX2•L, PbX2•2L, 2PbX2•L, PbX2•LL, and PbX2•2LL, but not all halides and ligands produced each type. Monodentate ligands were dimethylsulphoxide, N,N-dimethylacetamide, N,N-dimethylthioacetamide, thioacetamide, 2,6-dimethyl-γ-pyrone, N-methyl-2-pyridone, N-methyl-2-pyrollidinone, thiourea, pyridine, piperidine, and aniline, while bidentate ligands were ethylenediamine, tetramethylethylenediamine, 1,10-phenanthroline, and 2,2′-bipyridine. Infrared and Raman spectra are reported together with ligand vibrational frequencies shifted by coordination. Under similar experimental conditions qualitative trends in acceptor and donor abilities appeared to be PbI2 > PbBr2 > PbCl2 and S-donors > O-donors, respectively.

scholarly journals Vibrational Spectra and Force Constants of Tetrasulfurtetranitride, S4N4 [1]

1981 ◽  
Vol 36 (8) ◽  
pp. 850-858 ◽  
Author(s):  
Ralf Steudel
Keyword(s):  
Force Field ◽  
Raman Spectra ◽  
Vibrational Spectra ◽  
Point Group ◽  
Force Constants ◽  
Infrared And Raman Spectra ◽  
Valence Force ◽  
Group D ◽  
Single Bonds ◽  
Good Agreement

Abstract Infrared and Raman spectra of solid and dissolved S414N4 and of solid S415N4 have been recorded and assigned in accordance with the molecular point group D2d. 22 of the 28 fundamental vibrations of both molecules have been identified and used to calculate force constants applying a modified Urey-Bradley force field with 9 independent constants. Good agreement between observed and calculated wavenumbers was obtained, and both Urey-Bradley and valence force constants are given. The results indicate that-S4N4 basically contains eight SN single bonds and two extremely weak SS bonds.

Vibrational Spectra of 1,1-Dichlorocyclopropane

1971 ◽  
Vol 49 (15) ◽  
pp. 2533-2538 ◽  
Author(s):  
J. M. Freeman ◽  
P. J. Robinson
Keyword(s):  
Raman Spectra ◽  
Normal Mode ◽  
Vibrational Spectra ◽  
Force Constants ◽  
Infrared And Raman Spectra ◽  
Correct Assignment ◽  
Computer Procedure

Infrared and Raman spectra of 1,1-dichlorocyclopropane are reported. Force constants were determined by an iterative computer procedure for two possible sets of assignments of the normal mode frequencies. It is suggested that in the correct assignment the methylene rocking modes are at higher frequency than the twisting modes.

Schwingungsspektren von Ag3PS4 und Cu3PS4 / Vibrational Spectra of Ag3PS4 and Cu3PS4

1983 ◽  
Vol 38 (1) ◽  
pp. 27-30 ◽  
Keyword(s):  
Crystal Field ◽  
Raman Spectra ◽  
Vibrational Spectra ◽  
Far Infrared ◽  
Infrared Region ◽  
Vibrational Frequencies ◽  
Infrared And Raman Spectra

Abstract The infrared and Raman spectra of silver thiophosphate Ag3PS4 have been recorded. The observed frequencies are assigned on the basis of tetrahedral units by considering a splitting of the F2 modes by the crystal field. The vibrational frequencies of copper thiophosphate Cu3PS4 are completed for the far infrared region. For both title compounds DTA-data have been determined and interpreted.

The vibrational spectra of ClF2SbF6, BrF2SbF6, and ClO2SbF6

1970 ◽  
Vol 48 (21) ◽  
pp. 3456-3459 ◽  
Author(s):  
H. A. Carter ◽  
F. Aubke
Keyword(s):  
Strong Coupling ◽  
Raman Spectra ◽  
Vibrational Spectra ◽  
Vibrational Frequencies ◽  
Vibrational Modes ◽  
Infrared And Raman Spectra

Infrared and Raman spectra of ClF2SbF6, BrF2SbF6, and ClO2SbF6 are reported. Vibrational frequencies for the BrF2+ cation are assigned. In all compounds various degrees of anion–cation interaction are found. The symmetry of the anion is reduced but no internal similarity between the three spectra is recognizable. In addition, strong coupling of vibrational modes for BrF2SbF6 is observed.

scholarly journals Analytic calculations of anharmonic infrared and Raman vibrational spectra

2016 ◽  
Vol 18 (5) ◽  
pp. 4201-4215 ◽  
Author(s):  
Yann Cornaton ◽  
Magnus Ringholm ◽  
Orian Louant ◽  
Kenneth Ruud
Keyword(s):  
Raman Spectra ◽  
Vibrational Spectra ◽  
Vibrational Frequencies ◽  
High Order ◽  
Molecular Properties ◽  
Infrared And Raman Spectra ◽  
Recursive Scheme ◽  
Raman Intensities ◽  
Derivatives Of ◽  
Ir And Raman

Using a recent recursive scheme for the calculation of high-order geometric derivatives of molecular properties, we present the first analytic calculations of infrared and Raman spectra including anharmonicity both in the vibrational frequencies and in the IR and Raman intensities.

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