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    • Keywords


      Infrared and Raman spectra; normal modes; spectral changes; hydrogen bonding; phase transition

    • Abstract


      The infrared spectra of 2,4 dimethylaniline have been recorded in the region 3600-100 cm−1. The Raman spectra with polarization measurements have been recorded and investigated for the first time in the region 3500-100 cm−1. New frequency assignments have been proposed assuming the molecule to possess an approximateC2 symmetry. Fifty normal modes of the molecule, out of a possible fifty four modes, have actually been observed and assigned including twenty seven hitherto unreported frequencies. The observed spectral changes give evidence of the presence of an intermolecular hydrogen bonding of an N−H...N type, and suggest a solid-solid phase transition between 223 and 123 K in the molecule.

    • Author Affiliations


      A R Shukla1 2 C M Pathak1 N G Dongre1 B P Asthana1 Jacob Shamir1 3

      1. Department of Physics, Banaras Hindu University, Varanasi - 221 005, India
      2. Department of Non-Conventional Energy Sources, Block No. 14, CGO Complex, New Delhi - 110 003, India
      3. Department of Inorganic and Analytical Chemistry, The Hebrew University of Jerusalem, Jerusalem, Israel
    • Dates

  • Journal of Chemical Sciences | News

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