Synthesis and structural characterization of bis(salicylaldiminato) magnesium complexes of varying aggregation and coordination state
European Journal of Inorganic Chemistry
A series of salicylaldiminato ligands [C6H5N=CHC 6H4OH (1L), 2,6-iPrC6H 3N=CHC6H4OH (2L), and 2,6-iPrC 6H3N=CH-3,5-tBu2C6H2OH (3L)] were treated with Bu2Mg in the presence of the appropriate solvent system to yield the crystalline compounds [( 1L6Mg3)·thf] (1), [(2L 2Mg·thf)] (2), and [3L2Mg] (3). The products were characterized by 1H and 13C NMR spectroscopy and single-crystal X-ray diffraction. X-ray crystallographic analysis revealed that 1 adopts a unique trimeric aggregation state consisting of six-coordinate magnesium centers. Substitution of the ligand backbone resulted in the formation of the monomeric species 2 and 3. X-ray crystallographic analyses revealed 2 as a five-coordinate, distorted square-pyramidal magnesium complex and 3 as a four-coordinate, distorted tetrahedral species. Inspection of the metrical parameters in 1-3 indicates a decrease in the Mg-O and Mg-N bond lengths and an increase in the N-Mg-O bite angle with a decreasing coordination number at magnesium. A series of bis(salicylaldiminato)magnesium complexes have been synthesized and characterized in the solid state. Substitution of the ligand backbone was found to influence both the aggregation and the magnesium coordination state in these complexes. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Quinque, Geoffrey T.; Oliver, Allen G.; and Rood, Jeffrey A., "Synthesis and structural characterization of bis(salicylaldiminato) magnesium complexes of varying aggregation and coordination state" (2011). Faculty Publications. 1275.