• Dipole moments of arylcis- andtrans-styryl sulphides and sulphones

    • Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/jcsc/103/05/0631-0636

    • Keywords

       

      Dipole moments; arylcis- andtrans-styryl sulphides and sulphones; styryl-sulphur conjugation; styryl-sulphonyl conjugation; steric enhancement of conjugation

    • Abstract

       

      The dipole moments of thirteen aryl styryl sulphides and eleven aryl styryl sulphones have been determined. Among them are eightcis-trans isomeric pairs, four sulphides and four sulphones. The styryl group is found to conjugate with the sulphide function as an electron-withdrawing group. The angles which the styrylthio and styrylsulphonyl groups make with their axes of rotation are calculated. The observed dipole moments of the sulphides and sulphones are compared with the moments calculated by the vector addition of group moments. The dipole moments ofcis aryl styryl sulphides and sulphones are found to be generally lower than those of theirtrans isomers. An explanation is offered attributing the cause to sterically enhanced styryl-sulphur conjugation in thecis isomers.

    • Author Affiliations

       

      V Baliah1 2 T K Rathinasamy1 3

      1. Department of Chemistry, Annamalai University, Annamalai Nagar - 608 002, India
      2. 79, 3rd Cross Road, Venkatanagar, Pondicherry - 605 011, India
      3. 290, Theppam South, Virudhunagar - 626 001, India
    • Dates

       
  • Journal of Chemical Sciences | News

© 2021-2022 Indian Academy of Sciences, Bengaluru.