D. N. Sathyanarayana

Normal vibrations of N,N-dimethylacetamide

Infrared and Raman spectra of N,N-dimethylacetamide (DMA) are recorded and the normal vibrational analysis of the DMA skeleton as well as the entire molecule carried out employing the Urey-Bradley and modified Urey-Bradley force fields. Vibrational frequencies are assigned on the basis of the normal coordinate calculations and are compared with those of related molecules. Infrared spectra of metal complexes are examined to substantiate the band assignments.

Infrared spectral assignments of methyl and ethyl xanthato complexes of nickel(II)

Assignments of the infrared frequencies of methyl and ethyl xanthato complexes of nickel(II) have been made with the aid of normal coordinate analyses. The assignments are discussed in relation to those in related molecules.

Vibrational assignments for thiosemicarbazide and selenosemicarbazide and their deutero analogues

Abstract The normal coordinate analyses of the 16 in-plane vibrations of thiosemicarbazide and selenosemicarbazide and their deutero analogues have been made using Wilsons GF matrix method and the Urey—Bradley force field. A revision of the vibrational assignments has been made for thiosemicarbazide based on force constant calculations. A discussion of the CS stretching bands in the free ligand and their metal complexes is given.

Infrared and Raman spectra of 2,4-dithiobiuret and its normal vibrations

The infrared spectra of 2,4-dithiobiuret(DTB), N-deuterated dithiobiuret(DTB-d5) and the laser Raman spectrum of DTB are reported. Normal coordinate treatments of DTB and DTB-d5 have been carried out to aid the assignment of the vibrational frequencies. A trans—cis conformation is favoured for DTB molecule in the solid state.

Vibrational analysis and solid state conformation of monothiobiuret hydrate

Abstract The i.r. assignments for monothiobiuret(Mtb)-hydrate and its deuterated compound have been made from normal coordinate analyses carried out for Mtb and Mtb- d 5 using a chosen molecular model containing a trans-cis —CONHCS— group for Mtb (H 2 NCONHCSNH 2 ). The i.r. spectra of anhydrous Mtb in solid and in solution and of Mtb · H 2 O at liquid nitrogen temperature have also been studied.

Infrared spectral assignments for transition metal thioxanthates

The i.r. frequencies of ethylthioxanthate complexes of some transition metals have been interpreted on the basis of normal coordinate treatments of the 1:1 molecular models. The band assignments are disscussed in comparison with those in closely related xanthate molecules.