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

The synthesis and spectroscopic characterization of quaternary salts containing 2,2,-bipyridine, 1,10-phenanthroline, 4,7-dimethyl1,10-phenanthroline and 3,4,7,8-tetramethyl-1,10-phenanthroline is reported. The coordinating behaviour of the bipyridylium salts toward palladium, copper and dimethyltin(IV)halides is investigated. The reaction of N-R,2,2-bipyridylium (= L-1) bromide (R = 4-Cl-C6H4 center dot CO center dot CH2) with palladium(11) chloride in acetonitrile solution yields a crystalline product, shown by a single crystal X-ray study to be L1PdX(3), where X is a Cl/Br (1:1) composite. (c) 2007 Elsevier B.V. All rights reserved.