Journal
MOLECULES
Volume 26, Issue 23, Pages -Publisher
MDPI
DOI: 10.3390/molecules26237214
Keywords
bond activation; low oxidation state complexes; magnesium; metallacycles; ring system; X-ray crystallography
Funding
- EPSRC [EP/N509759/1]
- Centre for Doctoral Training in Critical Resource Catalysis (CRITICAT) [EP/ L016419/1]
- University of St Andrews
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By reacting with 4-dimethylaminopyridine (DMAP) under elevated temperatures, the hexameric magnesium 4-pyridyl complex can be obtained, forming a cyclic structure. Additionally, a by-product was identified during the reaction.
The reaction of [{((Ar)nacnac)Mg}(2)] ((Ar)nacnac = 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 [{((Ar)nacnac)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 ((Ar)nacnac)Mg nodes and linked by linear 4-pyridyl bridging ligands, and the structure is compared with other ring systems. [((Dip)nacnac)Mg(DMAP)(NMe2)] was structurally characterised as a by-product.
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