Resonance Raman spectra and normal-coordinate analysis of reduced porphyrins. 2. Copper(II) tetraphenylchlorin and copper(II) tetraphenylbacteriochlorin

1989 ◽  
Vol 93 (6) ◽  
pp. 2244-2252 ◽  
Author(s):  
Robert J. Donohoe ◽  
Michael Atamian ◽  
David F. Bocian
Keyword(s):  
Raman Spectra ◽  
Resonance Raman ◽  
Normal Coordinate Analysis ◽  
Normal Coordinate ◽  
Resonance Raman Spectra

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.

Resonance Raman spectra and normal-coordinate analysis of reduced porphyrins. 1. Zinc(II) tetraphenylporphyrin anion

1989 ◽  
Vol 93 (6) ◽  
pp. 2236-2243 ◽  
Author(s):  
Michael Atamian ◽  
Robert J. Donohoe ◽  
Jonathan S. Lindsey ◽  
David F. Bocian
Keyword(s):  
Raman Spectra ◽  
Resonance Raman ◽  
Normal Coordinate Analysis ◽  
Normal Coordinate ◽  
Resonance Raman Spectra

Resonance Raman spectra

1979 ◽  
Vol 293 (1402) ◽  
pp. 287-302 ◽  
Keyword(s):  
Raman Spectra ◽  
Resonance Raman ◽  
Point Group ◽  
Group Symmetry ◽  
Normal Coordinate ◽  
Bond Lengths ◽  
Bending Force ◽  
Resonance Raman Spectra ◽  
Haem Proteins ◽  
Coordinate Treatment

Selection rules for resonance Raman spectra are given for several porphins of D 4h point group symmetry. A normal coordinate treatment is presented, based on a potential function for which stretching and bending force constants are related to bond lengths, and to the product of the bond lengths of the bonds defining the bending angle, respectively. The results can be correlated with the persistent frequencies observed in the resonance Raman spectra of haem proteins where the haem is an iron octasubstituted porphin.

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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