• Raman effect and chemical constitution - Influence of constitutive and other factors on the double bonds in organic compounds. Part I—Coumarin

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    • Keywords


      Raman Spectrum; Coumarin; Carbon Tetrachloride; Polar Solvent; Raman Line

    • Abstract


      The Raman spectrum of coumarin in the solid state and when dissolved in various solvents has been examined with reference to (1) the C=C and (2) the C=O frequencies. Of the three frequencies belonging to (1) which are fairly constant throughout, the two lower ones represent the aromatic double bonds of the benzene ring and the third represents the ethylene double bond of the pyrone ring. The C=O frequency is considerably low in the solid state as well as in the solutions with certain polar solvents. This is attributed to the weakening of the C=O bond by the formation of hydrogen bonds through co-ordination.

    • Author Affiliations


      G V L N Murti1 T R Seshadri1

      1. Depariment of Chemistry, Andhra University, Waltair
    • Dates


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