Vibrational spectra and potential energy distributions for 1-benzyl-1 H -imidazole by normal coordinate analysis

2008 ◽  
Vol 40 (5) ◽  
pp. 537-545 ◽  
Author(s):  
C. James ◽  
C. Ravikumar ◽  
V. S. Jayakumar ◽  
I. Hubert Joe
Keyword(s):  
Potential Energy ◽  
Vibrational Spectra ◽  
Normal Coordinate Analysis ◽  
Normal Coordinate ◽  
Energy Distributions

A spectroscopic investigation of trimethyl- and triphenyl-arsine adducts of boron trihalides

1981 ◽  
Vol 59 (15) ◽  
pp. 2417-2428 ◽  
Author(s):  
John E. Drake ◽  
Layla N. Khasrou ◽  
Abdul Majid
Keyword(s):  
Nmr Spectroscopy ◽  
Potential Energy ◽  
Spectroscopic Investigation ◽  
Normal Coordinate Analysis ◽  
Normal Coordinate ◽  
Energy Distributions ◽  
Vibrational Assignments ◽  
Potential Parameters ◽  
C Nmr

Trimethyl- and triphenyl-arsine adducts of the type (CH3)3AsBX3 and (C6H5)3AsBX3, X = Cl, Br, I, have been prepared and characterised by infrared, Raman, 1H and 13C nmr spectroscopy. The vibrational assignments based on normal coordinate analysis are presented for the series (CH3)3AsBX3. Potential energy distributions and modified Urey–Bradley potential parameters are reported.

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.

The infrared, Raman, and resonance Raman spectra and normal coordinate analysis of methyl and ethyl dithioacetate

1982 ◽  
Vol 60 (2) ◽  
pp. 174-189 ◽  
Author(s):  
J. J. C. Teixeira-Dias ◽  
V. M. Jardim-Barreto ◽  
Y. Ozaki ◽  
A. C. Storer ◽  
P. R. Carey
Keyword(s):  
Raman Spectra ◽  
Vibrational Spectra ◽  
Resonance Raman ◽  
Normal Coordinate Analysis ◽  
Raman Intensity ◽  
Normal Coordinate ◽  
Intensity Enhancement ◽  
Strong Intensity ◽  
Resonance Raman Spectra ◽  
Absorbance Peak

Infrared, Raman, and resonance Raman data are reported for ethyl and methyl dithioacetate together with data for their isotopically substituted analogs: CD3C(=S)SCH3, CH3C(=S)SCD3, 13CH3C(=S)SCH3, CH313C(=S)SCH3, CD3C(=S)SCH2CH3, CH3C(=S)SCD2CH3, and CH313C(=S)SCH2CH3. Based on these data and a normal coordinate analysis of methyl dithioacetate, assignments are proposed for the majority of bands appearing in the vibrational spectra. Using excitation wavelengths in the 324–356 nm region strong intensity enhancement is observed for Raman bands near 1195, 1100, 730, and 580 cm−1 which are assigned to stretching motions of the CCSSC skeleton. Raman excitation profiles are reported for the 1197 and 581 cm−1 bands of ethyl dithioacetate and the electronic absorbance peak near 305 nm is identified as the source of resonance Raman intensity enhancement.

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