Trinuclear palladium complexes containing terminal nitrosyl ligands: Behavior in solid state and in solution. X-ray structures of Pd3(NO)2(μ-OCOCX3)4(η2-ArH)2 (X = F, Cl; ArH = toluene or benzene)

Two trinuclear Pd(II) nitrosyl carboxylate complexes Pd3(NO)2(μ-OCOCX3)4(η2-ArH)2 (X = F, ArH = toluene, 3a; X = Cl, ArH = benzene, 3b) have been prepared and structurally characterized. These display a linear Pd3 array capped by terminal bent NO ligands and η2-coordinated molecules of aromatic molecules. Solution IR and NMR measurements indicate that the solid state structure of 3a is partially maintained in solution, while 3b loses benzene when dissolved in dichloromethane.