New Insights into Structures, Stability, and Bonding of μ-Allyl Ligands Coordinated with Pd−Pd and Pd−Pt Fragments
New Insights into Structures, Stability, and Bonding of μ-Allyl Ligands Coordinated with Pd−Pd and Pd−Pt Fragments
复制标题
DOI：
10.1021/om950843c
复制
发表时间：
1996-04
期刊：
影响因子：
2.8
通讯作者：
H. Kurosawa;K. Hirako;Satoko Natsume;S. Ogoshi;N. Kanehisa;Y. Kai;S. Sakaki;Kaori Takeuchi
中科院分区：
文献类型：
--
作者：
H. Kurosawa;K. Hirako;Satoko Natsume;S. Ogoshi;N. Kanehisa;Y. Kai;S. Sakaki;Kaori Takeuchi
A series of complexes of μ-allyl ligands coordinated with the Pd−Pd fragment Pd2(μ-allyl)(μ-Cl)(PPh3)2 were prepared from reactions of the corresponding allylpalladium(II) chlorides with Pd(C2H4)(PPh3)2. The μ-allyl ligands employed contained both electron-withdrawing (Cl, CN, COOMe, SO2Ph) and electron-donating (Me, Ph) substituents at either the terminal or central carbon of the allyl framework. The relative ability of a substituted allyl ligand to coordinate to the Pd(I)−Pd(I) fragment vs the mononuclear Pd(II) fragment was determined by means of an allyl ligand exchange equilibrium between the dinuclear and the mononuclear fragments. The allyl ligand bearing the more withdrawing substituent coordinated to the Pd−Pd fragment more strongly than that bearing the less withdrawing substituent. The 1-methyl, 1-phenyl, and 1-chloroallyl ligands on the Pd−Pd bond exist in an anti configuration almost exclusively. X-ray structure determinations of some of the μ-allyl Pd−Pd and Pd−Pt complexes, PdM(μ-allyl)(μ-X...
