• Pratibha Naik

      Articles written in Pramana – Journal of Physics

    • Infrared intensity analysis of some MXY2 type molecules

      Pratibha Naik N Rajeswara Rao

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      Infrared intensity analysis of MXY2 type molecules has been attempted. The dipole momentμ of C=O is obtained to be different for different moleculesviz. for CH2O, 1.9052; for COCl2, 1.1517; for COF2, 0.6340; and for COBr2, 0.7687. Similarly in the case of CSF2 and CSCl2μC=S it was found to be 0.2473 and 0.2983 respectively. This shows that the effect of the electro-negative halogen atoms is very important.

    • Infrared intensity analysis of CH2Cl2 and CD2Cl2 in vapour and liquid states

      Pratibha Naik N Rajeswara Rao

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      In the infrared spectra of molecules with more than one C-H bond the symmetric and antisymmetric stretching bonds often overlap, causing uncertainty in the intensity analysis. For CH2Cl2 and CD2Cl2 in the vapour state, the two bands overlap to such an extent that Straley who takes it as one band attributes it to antisymmetric stretching while Saekiet al assign it to the symmetric stretching. Following the method of analysis initiated in this laboratory, we have solved this problem by ultimately obtaining intensities separately forA1 andB2 species. The band is mostly due to the symmetric stretching, 0.06 out of the total of 0.31 contributing toB2. Thus, this gives a method of separating the intensities of bands which are highly overlapping.

    • Raman and infrared intensity analysis of CHCl3 and CDCl3

      Pratibha Naik V A Padma N Rajeshwara Rao

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      Raman and infrared intensity analysis of CHCl3 is attempted to determine the bond polarisability derivatives and bond dipole moments and their derivatives respectively, on lines expained in our earlier papers.

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