The formation of unsymmetric diarsines from the reaction of aminoarsines and secondary organoarsines

Academic Article


  • The reaction of Me2AsNMe2 with Ph2AsH yields Ph2AsAsMe2, Me2AsAsMe2, Ph2AsAsPh2 and Me2NH. The course of the reaction was studied over a range of temperatures and concentrations in toluene-d8 solution 1H and 13C NMR spectroscopy. The NMR data indicate the initial formation of Me2NH and Ph2AsAsMe2. The diarsine subsequently undergoes symmetrization to give a mixture of the unsymmetric diarsine and the two symmetric diarsines. All attempts to isolate Ph2AsAsMe2 were unsuccessful. Exchange processes involving the .AsN< >NH and >AsAs< >AsAs< systems are very influential in determining the overall rate of reaction. Equilibrium constants were determined for the Me2AsAsMe2 Ph2AsAsPh2 and Et2AsAsEt2/Ph2AsAsPh2 systems. The results are compared with those of the analogous Me2AsH Me2AsAsMe2 system. © 1988.
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    Digital Object Identifier (doi)

    Author List

  • Gupta VK; Krannich LK; Watkins CL
  • Start Page

  • 51
  • End Page

  • 55
  • Volume

  • 150
  • Issue

  • 1