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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jcsc/116/06/0311-0317

    • Keywords

       

      Phosphonate salts; pyrophosphate esters; X-ray crystal structure

    • Abstract

       

      The compounds S(6-t-Bu-4-Me-C6H2O)2P(O)Cl (1), CH2(6-t-Bu-4-Me-C6H2O)2P(O)Cl (2) and (2,2′-C20H12O2)P(O)Cl (3) react with diazabicycloundecene (DBU) to give rise to, predominantly, the phosphonate compounds [S(6-t-Bu-4-Me-C6H6O)2P(O)(DBU)]+[Cl]− (4), [CH2(6-t-Bu-4-Me-C6H2O)2P(O) (DBU)]+[Cl]− (5) and [(2,2′-C20Hi2O2)P(0)(DBU)]+[Cl]- (6). The first two compounds could be isolated in the pure state. In analogous reactions of 1 and 2 with diazabicyclononene (DBN) or N-methyl imidazole, only the pyrophosphates [S(6-t-Bu-4-Me-C6H2O)2P(O)]2O (7) and [CH2(6-t-Bu-4-Me-C6H2O)2P(O)]2O (8) could be isolated, although the reaction mixture showed several other compounds in the phosphorus NMR. A possible pathway for the formation of phosphonate salts is proposed. The X-ray crystal structures of4,7 and8 are also discussed.

    • Author Affiliations

       

      K V P Pa Van Kumar1 K Praveen Kumar1 M Vijjulatha1 K C Kumara Swamy1

      1. School of Chemistry, University of Hyderabad, Hyderabad - 500 046, India

    • Dates

       
      Published
      November 2004
      Manuscript received
      27 July 2004
      Manuscript revised
      25 October 2004

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