Synthesis and Structure of Cyclometallated Palladium Binuclear Complexes with Bridging Carboxylate Ligands

New bimetallic pivalate Pd(II) complex [PdNi((OOCBu)-Bu-t)(4)((HOOCBu)-Bu-t)] (I) has been synthesized from [PdNi(OOCMe)(4)] and used as a starting reagent in a further complexation reaction. Cyclometallated binuclear carboxylate palladium complexes [(OOCMe)Pd(2-phpy)](2) (II) and [((OOCBu)-Bu-t)Pd(2-phpy)](2) (III) have been obtained by the reaction between heterometallic compounds [Pd(OOCR)(4)Ni] (R = Me, Bu-t) and 2-phenylpyridine (2-phpy). The reaction proceeds at room temperature under mild conditions. All the compounds obtained have been isolated in crystalline form from a medium of nonpolar solvents, characterized by single-crystal X-ray diffraction analysis, and deposited at the Cambridge Crystallographic Data Center (CCDC nos. 2256606 for I, 2247942 for II, and 2247943 for III).