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Linear, Trinuclear Cobalt Complexes with o-Phenylene-bis-Silylamido Ligands
Kirill Yu Monakhov1, Jan van Leusen1, Paul Kögerler1,2
1Institut für Anorganische Chemie, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany.
Abstract:
Transamination of [Co{N(SiMe3 )2 }2 ]2 with C6 H4 (NHSiiPr3 )2 gave the centrosymmetric trinuclear [{Coter N(SiMe3 )2 (μ-η-[o-C6 H4 (κNSiiPr3 )2 ])}2 Coint ] (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 ][{Coter N(SiMe3 )2 (μ-η-[o-C6 H4 (κNSiiPr3 )2 ])}2 Coint ] (4) with the anion isostructural to 1. The centrosymmetric Fe complex [{Feter N(SiMe3 )2 (μ-η-[o-C6 H4 (κNSiiPr3 )2 ])}2 Feint ] (5), analogous to 1, was also obtained.
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