The synthesis of Pd(C4R4)(bipy) has been previously reported [5]. We obtained it by mixing stoichiometric amounts of Pd(C4R4) and bipy in CH2Cl2 and standing of the solution for 2 h. The desired compound was obtained as reddish brown substance by evaporation of the solvent. (PdC22H20N2O8, F.W. = 548). EI-MS: (complex + H+) 551 (110Pd), 549 (108Pd), 547 (106Pd), 546 (105Pd), and 545 (104Pd).