Diastereomerism in palladium(II) allyl complexes of P,P-, P,S- and S,S-donor ligands, Ph2P(E)N(R)P(E′)Ph2 [R=CHMe2 or (S)-*CHMePh; E=E′=lone pair or S]: solution behaviour, X-ray crystal structure and catalytic allylic alkylation reactions
作者:Swadhin K. Mandal、G.A. Nagana Gowda、Setharampattu S. Krishnamurthy、Chong Zheng、Shoujian Li、Narayan S. Hosmane
DOI:10.1016/s0022-328x(03)00227-4
日期:2003.6
syn/anti-) in solution. Analogous allylpalladiumcomplexes derived from the chiral homodonor diphosphazane ligand, Ph2PN((S)-*CHMePh)PPh2 (3) exist as a single species when the allyl moiety is symmetrical (R′=R″=H or Ph) but a 1:1 mixture of two different face-coordinated diastereomers if the allyl moiety is unsymmetrically substituted (R′≠R″). The 1,3-dimethyl–allyl complex, [Pd(η3-1,3-Me2C3H3)Ph2PN
Chalcogen-capped ruthenium carbonyl clusters derived from diphosphazane mono- and dichalcogenides of the type X2P(E)N(R)PX2 and X2P(E)N(R)P(E)X2 (E=S or Se)
作者:Thengarai S. Venkatakrishnan、Setharampattu S. Krishnamurthy、Munirathinam Nethaji
DOI:10.1016/j.jorganchem.2005.05.041
日期:2005.9
Reactions of Ru3(CO)12 with diphosphazane monoselenides Ph2PN(R)P(Se)Ph2 [R = (S)-∗CHMePh (L4), R = CHMe2 (L5)] yield mainly the selenium bicapped tetraruthenium clusters [Ru4(μ4-Se)2(μ-CO)(CO)8μ-P,P-Ph2PN(R)PPh2}] (1, 3). The selenium monocapped triruthenium cluster [Ru3(μ3-Se)(μsb-CO)(CO)7κ2-P,P-Ph2PN((S)-∗CHMePh)PPh2}] (2) is obtained only in the case of L4. An analogous reaction of the diphosphazane