Synthesis and crystal structures of magnesium complexes with NNO Schiff base ligands bearing quinolyl pendant donors

A series of ketoimines bearing quinolyl pendants was prepared through Schiff base condensation of 1,3-diketones (2,4-pentanedione, benzoylmethane, and 1-benzoylacetone) and 8-aminoquinoline or 8-amino-2-methylquinoline. The ketoimines were isolated in 46–90% yield and characterized spectroscopically and crystallographically. Reaction of the ketoimines with magnesium 4-methylbenzylalkoxide yielded octahedral magnesium complexes in 67–90% yield. The spectroscopic and crystallographic properties of the magnesium complexes were explored. Structures of 1, 4, 8, 10, and 11 are reported.

A series of ketoimines bearing quinolyl pendants was prepared through Schiff base condensation of 1,3-diketones with 8-aminoquinolines. Reaction of the ketoimines with magnesium 4-methylbenzylalkoxide yielded magnesium complexes possessing a distorted octahedral geometry. The spectroscopic and crystallographic properties of the ketoimines and the magnesium complexes are reported.Figure optionsDownload as PowerPoint slide