Bis-ligated zinc complexes with tetrahedral or octahedral coordination geometries are often observed with multidentate ligands.  Our group recently developed a series of  tridentate ketoimines bearing pendant quinolyl donors where the substituents on the ketoimine backbone were varied from electron donating to electron withdrawing groups.  Bis-ligated zinc complexes were prepared through sequential reaction of a  ketoimine with diethyl zinc and then 2,6-di-tert-butyl phenol under an inert  atmosphere glovebox and isolated with precipitation.  Complexes with CF3 substituents were stable to air and protonated solvents in contrast to their  counterparts with electron donating groups on the ketoimine backbone.  The  bis-ligated zinc complexes were characterized with 1H, 13C, and 19F NMR, single crystal x-ray crystallography, and mass spectrometry.  Crystallographic studies  showed that the complexes adopted a distorted octahedral coordination geometry  around zinc.

Synthesis and characterization of <i>bis</i>-ligated zinc complexes with tridendate ketoiminate ligands

243rd National Meeting (2012)

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Synthesis and characterization of bis-ligated zinc complexes with tridendate ketoiminate ligands