Kinetics of azide attack on organonitriles coordinated to pentaamminecobalt(III) Article

Hall, JH, de la Vega, RL, Purcell, WL. (1985). Kinetics of azide attack on organonitriles coordinated to pentaamminecobalt(III) . INORGANICA CHIMICA ACTA, 102(2), 157-162. 10.1016/S0020-1693(00)86753-5

cited authors

  • Hall, JH; de la Vega, RL; Purcell, WL

authors

abstract

  • Four new 5-substituted tetrazole complexes of pentaamminecobalt(III) have been synthesized. The N-1 bonded complexes of 5-(p-methylphenyl)tetrazole, 5-(p-chlorophenyl)tetrazole, 5-(p-nitrophenyl)tetrazole and the N-2 bonded complex of 5-(m-formylphenyl)tetrazole. Kinetic studies of the complex formation reaction, wherein azide ion attacks coordinated organonitrile ligands, have been shown to follow a second order rate law, first order in nitrile complex and azide. Rate constants and activation parameters have been determined for five organonitrile complexes and a Hammett type correlation has been established for the formation reaction described by the equation log k = 2.42σ - 2.44 at 25 °C and ionic strength 1.0 M. Two mechanisms are proposed for complex formation which are consistent with our observations. © 1985.

publication date

  • August 15, 1985

published in

Digital Object Identifier (DOI)

start page

  • 157

end page

  • 162

volume

  • 102

issue

  • 2