Complexation and proton transfer by hydroxamic acids in model inhibited metallohydrolases: Formation of metal hydroxamate trimers

  • Brown D
  • Clarkson G
  • Fitzpatrick N
 et al. 
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Abstract

Reaction between the dimeric metal complexes, [M2(μ-OAcF)2(OAcF)2(μ-H2O)(tmen)2], M=Co(II), Ni(II), and aceto- and benzohydroxamic acids (AHA, BHA) gives the novel trimeric complexes, [M3(μ-OAcF)4(μ-RA)2(tmen)2], M=Co(II), Ni(II); RA=AA, BA, in which each hydroxamate bridges two metal centres via its deprotonated hydroxyl and the carbonyl oxygen bonds one metal centre only together with the doubly protonated salt [(tmen)·2H][OAcF]2. In contrast, self-assembly from M(OAcF)2·4H2O, tmen and RHA gives the dibridged hydroxamate dimers [M2(μ-OAcF)(μ-RA)2(tmen)2] [OAcF]. © 2004 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • Crystal structures
  • Model inhibited complexes
  • Nickel hydroxamates
  • OAc, CH3COO-
  • OAcF, CF3COO-
  • Trinuclear cobalt
  • tmen, N,N,N′,N′-tetramethylethylenediamine

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Authors

  • D. A. Brown

  • G. J. Clarkson

  • N. J. Fitzpatrick

  • W. K. Glass

  • A. J. Hussein

  • T. J. Kemp

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