Synthesis, characterization and X-ray structure of N-2-pyridylmethylidene-1-phenylethylamine-PdCl2 complexes

The PdCl2 complexes with imines derived from reactions of 2-pyridinealdehyd e with (R)-, (S)- and racemic 1-phenylethylamine have been synthesized and characterized by various physico-chemical methods. The (R)-1 and (S)-1 pall adium complexes obtained from the (R)- and (S)- ligands were optical antipo des and differed only by the optical rotation sign and opposite circular di chromism spectra. Two crystals I and II resulted from these complexes were studied by the X-ray analysis. The first structure turned out to be racemic (it had the centrosymmetric space group P2(1)/c) while the second one (spa ce group P2(1)) contained the molecules of a single enantiomer. The cis che late coordination of the organic ligand and almost square-planar coordinati on geometry was found for both crystals. (C) 2000 Elsevier Science S.A. All rights reserved.