849364-73-4Relevant articles and documents
Di- and tri-nuclear molybdenum-palladium complexes bearing strong π-acceptor P-N-P ligands, MeN{P(OR)2}2 (R = CH2CF3 or Ph)
Ganesan, Mani,Krishnamurthy, Setharampattu S.,Nethaji, Munirathinam
, p. 1080 - 1091 (2005)
The dipalladium complexes, [PdCl(μ-MeN{P(OR)2} 2)]2 (R = CH2CF3, 1a; Ph, 1b) react with [Mo2(η5-C5H5) 2(CO)6] in boiling benzene to afford the molybdenum-palladium heterometallic complexes, [(η5-C 5H5)(CO)Mo(μ-MeN{P(OR)2}2) 2PdCl] (R = CH2CF3, 3a; Ph, 3b), [(η5-C5H5)Mo(μ3-CO) 2(μ-MeN{P(OR)2}2)2Pd 2Cl], (R = CH2CF3, 5a; Ph, 5b), [(η5-C5H5)(Cl)Mo(μ2-CO) (μ2-Cl)(μ-MeN{P(OR)2}2)PdCl], (R = CH2CF3, 6a; Ph, 6b) and also the mononuclear complex [Mo(CO)Cl(η5-C5H5)(κ2- MeN{P(OR)2}2)], (R = Ph, 4b). These complexes have been separated by column chromatography and are characterised by elemental analysis, IR, 1H, 31P{1H} NMR data. The structures of 1a, 3a, 4b, 5b and 6a have been confirmed by single crystal X-ray diffraction. The CO ligands in 5b and 6a adopt a semi-bridging mode of bonding; the Mo-CO distances (1.95-1.97 A?) are shorter than the Pd-CO distances (2.40-2.48 A?). The Pd-Mo distances fall in the range, 2.63-2.86 A?. The reaction of [Mo2(η5-C5H5) 2(CO)6] with MeN{P(OPh)2}2 in toluene gives [Mo2(CO)4(η5-C 5H5)2(κ1-MeN{P(OPh) 2}2)2] (2) in which the diphosphazane acts as a monodentate ligand.
