New Acetonyl Palladium(II) Complexes

[Pd{CH2C(O)Me}Cl]n (1), reacts with P- and N-donor ligands to afford cis-[Pd{CH2C(O)Me}Cl(dppf)] (dppf = bis(diphenylphosphino)ferrocene (2)) and [Pd{CH2C(O)Me}ClL2] (L = pyridine = py (3), 4-Me-pyridine = Mepy (4), 4-tBu-pyridine = tBupy (5)). Reaction of 3 or 3−5 with 1 equiv of [Tl(acac)] or TlTfO and L affords, respectively, [Pd{CH2C(O)Me}(O,O-acac)(py)] (6) or [Pd{CH2C(O)Me}L3]TfO (L = py (7), Mepy (8), tBupy (9)). The reaction of 9 with 1 equiv of {Ph2P(CH2)2}2PhP (triphos) gave [Pd{CH2C(O)Me}(triphos)]TfO (10). Complex 1 reacts with norbornene (nbn) followed by addition of L2 (1:2:1), with 1,5-cyclooctadiene (cod) (1:1) or with 1,1-dimethyl allene (dma) to give [Pd{(nbn)CH2C(O)Me}ClL2] (L2 = 2,2′-bipyridine (bpy) (11), 4,4′-di-tert-butyl 2,2′-bipyridine (dbbpy) (12)), [Pd{CH2C(O)Me}Cl(cod)] (13), or [Pd{η3-CH2C{CH2C(O)Me}Cl]2 (14), respectively. The structures of complexes 3, 8, 11, and 13 have been solved by X-ray diffraction studies.