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      https://www.ias.ac.in/article/fulltext/jcsc/119/05/0467-0473

    • Keywords

       

      Singlet chlorocarbenes insertion; C-H of alkanes; MP2 and DFT; NBO analysis.

    • Abstract

       

      Transition states for the insertion reactions of singlet mono and dichlorocarbenes (1CHCl and 1CCl2) into C-H bonds of alkanes (methane, ethane, propane and 𝑛-butane) have been investigated at MP2 and DFT levels with 6-31g (𝑑 , 𝑝) basis set. The $p_\pi$ of 1CHCl and 1CCl2 may interact with alkane’s filled fragment orbital of either 𝜎 or 𝜋 symmetry. So chlorocarbenes insertion reactions have been investigated for both (𝜎/𝜋) approaches. The 𝜎 approach has been adjudicated to be the minimum energy path over the 𝜋 approach both at the MP2 and DFT levels. Mulliken, NPA and ESP derived charge analyses have been carried out along the minimal energy reaction path using the IRC method for 1CHCl and 1CCl2 insertions into the primary and secondary C-H bonds of propane. The occurrence of TSs either in the electrophilic or nucleophilic phase has been identified through NBO charge analyses in addition to the net charge flow from alkane to the carbene moiety.

    • Author Affiliations

       

      M Ramalingam1 K Ramasami2 P Venuvanalingam3

      1. Department of Chemistry, Rajah Serfoji Government College, Thanjavur 613 005
      2. Department of Chemistry, Nehru Memorial College, Puthanampatti 621 007
      3. School of Chemistry, Bharathidasan University, Tiruchirapalli 620 024
    • Dates

       
  • Journal of Chemical Sciences | News

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