The reaction of K 2 [PdCl 4 ] with [(S,S)-H 2 (Et(2) complex with one hydrolyzed ester group. The compound was characterized by spectroscopic methods and it was found that the reaction is diastereoselective ( 1 H and 13 C NMR; one diastereoisomer of four possible). In addition, the structure of 2 was confirmed by X-ray diffraction analysis, indicating that the product is the (R,R)-N,N 0 -configured isomer. DFT calculations support the formation of one diastereoisomer of 2.