Synthesis of a Hexameric Magnesium 4-pyridyl Complex with Cyclohexane-like Ring Structure via Reductive C-N Activation |
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| Authors: | Samuel R Lawrence Matthew de Vere-Tucker Alexandra M Z Slawin Andreas Stasch |
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| Institution: | EaStCHEM School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, UK; (S.R.L.); (M.d.V.-T.); (A.M.Z.S.) |
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| Abstract: | The reaction of {(Arnacnac)Mg}2] (Arnacnac = HC{MeC(NAr)}2, Ar = 2,6-diisopropylphenyl, Dip, or 2,6-diethylphenyl, Dep) with 4-dimethylaminopyridine (DMAP) at elevated temperatures afforded the hexameric magnesium 4-pyridyl complex {(Arnacnac)Mg(4-C5H4N)}6] via reductive cleavage of the DMAP C-N bond. The title compound contains a large s-block organometallic cyclohexane-like ring structure comprising tetrahedral (Arnacnac)Mg nodes and linked by linear 4-pyridyl bridging ligands, and the structure is compared with other ring systems. (Dipnacnac)Mg(DMAP)(NMe2)] was structurally characterised as a by-product. |
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| Keywords: | bond activation low oxidation state complexes magnesium metallacycles ring system X-ray crystallography |
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