V B Kartha
Articles written in Proceedings – Section A
Volume 58 Issue 4 October 1963 pp 216-228
Hydrogen bonding between alkyl sulphonyl compounds and
Volume 65 Issue 1 January 1967 pp 1-18
The infra-red spectra of two polyhalogenated ethanes, 1, 1-difluoro-2, 2-dichloro ethane and 1, 2-dibromo-1, 1, 2, 2-tetrachloro ethane were obtained in the region of 2·5–38 microns. The spectra of CHF2-CHCl2 were obtained in gas, liquid and solid states and also in solvents of widely varying dielectric constants.
These spectral studies showed that the molecule exists in the form of two rotational isomers. The fundamental modes of the two isomers were identified on the basis of intensity changes from gas to liquid to solid and in solvents of different dielectric constants. The observed infra-red absorption bands have been assigned in terms of the fundamental absorption bands.
Spectra of CBrCl2-CBrCl2 were obtained in the solid and vapour phase and in various solvents. These spectra showed that CBrCl2-CBrCl2 exists only in the trans form. The infra-red spectra, combined with Raman data available from literature was used for complete assignment of the observed absorption bands.
Volume 66 Issue 4 October 1967 pp 196-200
Interactions of 1, 1, 1 trifluoroacetone with proton donor solvents of the type RH [where R=HO, CH3S, CH3CH2CH2CH2S, CH3O, (CH3)2N, (C2H5)2N] have been investigated using NMR and infra-red techniques. Evidence of the formation of addition products of the type CF3.C(OH)R.CH3 where OH group is hydrogen-bonded with the fluorine of the CF3 group has been obtained.
Volume 66 Issue 6 December 1967 pp 319-324
The alkali metal chelates of salicylaldehyde have been prepared and their infrared spectra obtained. The spectra indicate strong bonding between the metal and hydroxy oxygen and only weak co-ordination of the metal to the carbonyl oxygen. For the lithium complexes two M-O stretching frequencies have been observed at about 590 cm.−1 and 490 cm.−1 The infrared spectra of the complexes have also given indirect evidence towards assignment of the C-OH and aldehydic C-H stretching frequencies.