Palladium(II) complexes with R2edda derived ligands, Part I: Reaction of diisopropyl (S,S)-2,2'-(1,2-ethanediyldiimino)- dipropanoate with K2[PdCl4]

The reaction of K2(PdCl4) with (S,S)-(i-Pr)2eddip diester (diisopropyl (S,S)-2,2'-(1,2-ethanediyldiimino)dipropanoate) resulted in {PdCl2((S,S)-(i- -Pr)2eddip-κ 2 N,N')} (1) and {PdCl((S,S)-(i-Pr)eddip-κ 2 N,N',κO)} (2) with one hydrolyzed ester group. The compounds were characterized by spectroscopic me- thods and it was proved that the reaction is diastereoselective ( 1 H- and 13 C-NMR) in the case of 2 (one diastereoisomer of four possible). The structure of 2 was determined by X-ray diffraction analysis, indicating that the product is the (R,R)-N,N' configured isomer. In contrast, the reaction yielding 1 produced two of three possible diastereoisomers. DFT calculations support the formation of two diastereoisomers of 1 and of one diastereoisomer of 2.