Synthesis, Reactivity and Crystal Structures of the Palladium(II) Complexes with the Pyrimidine Containing Ligand: Crystal Structures of [Pd(PPh₃)(η¹‐C₄H₃N₂)(η²‐S₂CNC₄H₈)] and [Pd(PPh₃)(η¹‐C₄H₃N₂)(η²‐Tp)]

Abstract

Keywords: 5-Bromo-pyrimidine; Pyrrolidinyl dithiocarbamate; Tris(pyrazoyl-1-yl)borate; Palladium; X-ray diffraction. INTRODUCTIONCatalytic C-C coupling reactions at nickel by C-F activation of a pyrimidine was reported by Braun. 1a SuzukiMiyaura cross-coupling reactions by catalytic activity of dipalladium, 1b Suzuki cross-coupling reactions of a variety organoboronic acids and aryl bromides by the pyridylbridged palladium complex 2 as an effective precatalyst, coupling of aryl boronic acids and aryl halides by the palladacycle 3 complex, Heck reaction by the imidazolium palladium complex 4 and intramolecular reductive elimination by a Pd-N binuclear complex 5 those are the most important reactions in organic synthesis 6a of palladium complexes catalyzed forming C-C bond.Recently we reported syntheses, reactivities, interand intramolecular dissociation, and crystal structures of Pd complexes containing thiocarbarmoyl, 7 oxythiocarbonyl, 8 thiazolinyl, 9 and methylpyridine 10a moieties. These ligands induced forming binuclear complexes in which those were assisted by nitrogen or sulfur atom.In order to obtain a better understanding of how these ligands interact with the metal center and the following study for applying in organic synthesis, herein, we report the synthesis and crystal structures of palladium complexes