468731-26-2Relevant academic research and scientific papers
Cyclopalladated compounds with a bidentate [C, N]/terdentate [C, N, S]benzylidenethiophene imine ligand
Fernández, Alberto,Vázquez-García, Digna,Fernández, Jesús J,López-Torres, Margarita,Suárez, Antonio,Mosteiro, Roberto,Vila, José M
, p. 162 - 169 (2002)
Reaction of the Schiff base ligand 2,3-(MeO)2C6H3C(H)=NCH2 (C4H3S) (1), with palladium(II) acetate in toluene gave the dinuclear cyclometallated complex [Pd{2,3-(MeO)2C6H2C(H)=NCH2 (C4H3S)}(μ-OAc)]2 (2), with the ligand bonded to the palladium atom through the imine nitrogen and the C6 carbon atom. The X-ray crystal structure of complex 2 is described. The reaction of 2 with aqueous sodium chloride gave the chloro-bridged complex [Pd{2,3-(MeO)2C6H2C(H)=NCH2 (C4H3S)} (μ-Cl)]2 (3), after a metathesis reaction. Reaction of 3 with PPh3 in acetone gave the mononuclear cyclometallated complex [Pd{2,3-(MeO)2C6H2C(H)=NCH2 (C4H3S)}(Cl)(PPh3)] (4), in a bridge-splitting reaction. Treatment of 4 with silver triflate gave the cyclometallated complex [Pd{2,3-(MeO)2C6H2C(H)=NCH2 (C4H3S)}(PPh3)][CF3SO3] (7), with the palladium atom bonded to four different atoms C, N, S and P. Reaction of 3 with the diphosphines dppp and dppb in a 1:1 molar ratio gave the dinuclear cyclometallated complexes [{Pd[2,3-(MeO)2C6H2C(H)=NCH2 (C4H3S)](Cl)}2(μ-Ph2 P(CH2)nPPh2)] (5: n = 3; 6: n = 4), with the diphosphine bridging the two palladium atoms. The X-ray crystal structures of complexes 4 and 6 are reported.
