Phosphinosulphoxide rhodium complexes. Synthesis, crystal structure, and catalytic chemistry of [(2,3,5,6-η)-bicyclo[2.2.1]-hepta-2,5-diene][P,O-diphenyl(phenylsulphinylmethyl)-phosphine]rhodium(I) trifluoromethanesulphonate and asymmetric analogues
作者:Nathaniel W. Alcock、John M. Brown、Phillip L. Evans
DOI:10.1016/0022-328x(88)83094-8
日期:1988.11
4, Dc = 1.47 g cm−3, R = 0.041, Rω 0.046 for 4809 unique observed reflections (I > 3 σ(I)). An optically active analogue was prepared from (R)-p-tolyl methyl sulphoxide, and the rhodium complexes were evaluated for catalytic effectiveness in homogeneous hydrogenation. It was demonstrated that ligand/rhodium complexes are present under turnover conditions.
通过α-硫代烷基亚砜与Ph 2 PCl的反应可轻松获得α-硫代亚砜,并且在纯净时对内部氧转移稳定。如此制备的化合物Ph 2 PCH 2 S(O)Ph显示形成阳离子铑双环[2,2,1]庚-2,5-二烯配合物,其中膦和亚砜形成螯合实体。通过X射线衍射研究证实了该结构。膦亚砜配合物(第三加合物)的晶体C 27 H 25 F 3 O 4 S 2 PRh。C 4 H 8 O是单斜晶系,P 2 1 / c,一个= 10.462,b = 16.500,Ç = 18.690埃,β= 104.50°,Ž = 4,d Ç =1.47克厘米-3,- [R = 0.041,[R ω 0.046对于4809米独特观察到的反射(我> 3σ(我))。由(R)-对甲苯基甲基亚砜制备旋光类似物,并评价铑配合物在均相氢化中的催化效果。已证明在周转条件下存在配体/铑配合物。