New Insights into Structures, Stability, and Bonding of μ-Allyl Ligands Coordinated with Pd−Pd and Pd−Pt Fragments
作者:Hideo Kurosawa、Kazuyoshi Hirako、Satoko Natsume、Sensuke Ogoshi、Nobuko Kanehisa、Yasushi Kai、Shigeyoshi Sakaki、Kaori Takeuchi
DOI:10.1021/om950843c
日期:1996.4.16
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)(PPh3)2 (11, M = Pt, allyl = CH2C(COOMe)CH2, X = Br; 12, M = Pd, allyl = CH2C(COOMe)CH2, X = Br; 13, M = Pd, allyl = CH2CHCH(COOMe), X = SPh) were carried out. The crystal of 11 was isomorphous with
由相应的烯丙基钯(II)氯化物与Pd(C 2)反应制备了一系列与Pd-Pd片段Pd 2(μ-烯丙基)(μ-Cl)(PPh 3)2配位的μ-烯丙基配体配合物。H 4)(PPh 3)2。所使用的μ-烯丙基配体在烯丙基骨架的末端或中心碳上都包含吸电子(Cl,CN,COOMe,SO 2 Ph)和给电子(Me,Ph)取代基。的取代的烯丙基配的相对能力来协调到PD(I)-Pd(I)片段VS单核Pd(II)片段是通过双核片段和单核片段之间的烯丙基配体交换平衡来确定的。带有较多吸取取代基的烯丙基配体比带有较少吸取取代基的烯丙基配体更强地与Pd-Pd片段配位。Pd-Pd键上的1-甲基,1-苯基和1-氯烯丙基配体几乎全部以反构型存在。某些μ-烯丙基Pd-Pd和Pd-Pt配合物PdM(μ-烯丙基)(μ-X)(PPh 3)2(11,M = Pt,烯丙基= CH 2 C( COOMe)CH 2,X = Br;12,M