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Transamination of [Co{N(SiMe3)2}2]2 with C6H4(NHSi iPr3)2 gave the centrosymmetric trinuclear [{CoterN(SiMe3)2(μ-η-[ o-C6H4( κNSi iPr3)2])}2Coint] ( 1) (Coter, Coint=terminal, internal Co, respectively), with 3-coordinate Coter, and Coint 'sandwiched' between the o-phenylenes of the two ligands; experimental and computational data support CoII centres and ditopic o-amido-imino-cyclohexen-allyl ligands; magnetic studies reveal intermetallic ferromagnetic interactions and single-molecule magnet (SMM) character. One-electron reduction of 1 yielded the salt [K(18-crown-6)(THF)2][{CoterN(SiMe3)2(μ-η-[ o-C6H4( κNSi iPr3)2])}2Coint] ( 4) with the anion isostructural to 1. The centrosymmetric Fe complex [{FeterN(SiMe3)2(μ-η-[ o-C6H4( κNSi iPr3)2])}2Feint] ( 5), analogous to 1, was also obtained. [ABSTRACT FROM AUTHOR]