Trinuclear palladium complexes containing terminal nitrosyl ligands: Behavior in solid state and in solution. X-ray structures of Pd 3(NO)2(μ-OCOCX3)4(η ²-ArH)2 (X = F, Cl; ArH = toluene or benzene)

Two trinuclear Pd(II) nitrosyl carboxylate complexes Pd 3 (NO) 2 (μ-OCOCX 3 ) 4 (η 2 -ArH) 2 (X = F, ArH = toluene, 3a ; X = Cl, ArH = benzene, 3b ) have been prepared and structurally characterized, and their solution behavior has been studied by IR and NMR spectroscopy. Two trinuclear Pd(II) nitrosyl carboxylate complexes Pd 3 (NO) 2 (μ-OCOCX 3 ) 4 (η 2 -ArH) 2 (X = F, ArH = toluene, 3a ; X = Cl, ArH = benzene, 3b ) have been prepared and structurally characterized. These display a linear Pd 3 array capped by terminal bent NO ligands and η 2 -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.