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      https://www.ias.ac.in/article/fulltext/pram/035/02/0127-0136

    • Keywords

       

      Force constants; intensity analysis; methyl chlorides

    • Abstract

       

      The secular equation (GF - Eλ)L = 0 contains more force constants than can be calculated from the equations formulated using the frequencies. For a 3 × 3 matrix, there are 6 force constants but only 3 frequencies. Attempts were made by others to estimate all the 6 constants to satisfy the frequencies and Coriolis constants and rotation distortion constants. However, many attempts are not made in these estimations to satisfy the intensities. A full complement of equations is derived to evaluate all the force constants combining the intensity equationsI =L’A withLL’ =G and evaluated the force constants ofA1 species of CH3Cl and CD3Cl. A simple analysis of a 2 × 2 matrix shows thatF12/F22=G12−1/G22−1 as reported earlier.

    • Author Affiliations

       

      V Dayanand1 K Ravindranath1 N Rajeswara Rao1 2

      1. Department of Physics, Osmania University, Hyderabad - 500 029, India
      2. 3-6-416/2, Himayatnagar, Hyderabad, India
    • Dates

       
  • Pramana – Journal of Physics | News

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