NMR Studies of the Reactions of Me2AsH with Me2AsNMe2 and Me2AsNMe2•BH3: Synthetic Routes to Me2AsAsMe2

Academic Article

Abstract

  • Me2AsH reacts irreversibly with Me2AsNMe2 and Me2AsNMe2•BH3 to give good yields of Me2AsAsMe2. The nitrogen-containing product is Me2NH or Me2NH•BH3, respectively. These reactions have been followed by using multinuclear (1H, 11B, and 13C) NMR spectroscopy to elucidate the respective reaction mechanisms. Although the Me2AsH/Me2AsNMe2 reaction proceeds faster initially, the overall rate of reaction is slower than that for the Me2AsH/Me2AsNMe2•BH3 reaction. This is a consequence of the presence of inhibiting exchange reactions in the Me2AsH/Me2AsNMe2 system that are absent when Me2AsNMe2 and Me2NH are bound to BH3 in the Me2AsH/Me2AsNMe2•BH3 reaction. A detailed NMR study of the exchange reactions involving the >AsNNH, >AsAsAsH, and >AsNAsAs< systems is also discussed with respect to the relative impact of those systems on the rate of formation of Me2AsAsMe2. © 1986, American Chemical Society. All rights reserved.
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    Digital Object Identifier (doi)

    Author List

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

  • 2553
  • End Page

  • 2556
  • Volume

  • 25
  • Issue

  • 15