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.
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