Synthesis, spectroscopic and structural characterization of the reaction products of quaternary cationic 2,2′-bipyridylium ligand bromide salts with metal halides

Quaternary salts containing 2,2-bipyridine, 1,10-phenanthroline, 4,7-dimethyl-1,10-phenanthroline and 3,4,7,8-tetramethyl-1,10-phenanthroline are able to interact with palladium, copper and dimethyltin(IV)halide acceptors. The reaction of N-R,2,2′-bipyridylium bromide (R = 4-Cl-C6H4 · CO · CH2) (L) with palladium(II) chloride in acetonitrile solution yields a crystalline product, shown by a single crystal X-ray study to be LPdX3, where X is a Cl/Br (1:1) composite.