Platinum Complexes of Rigid Bidentate Phosphine Ligands in the Hydroformylation of 1-Octene
作者:Jarl Ivar van der Vlugt、Ruben van Duren、Guido D. Batema、René den Heeten、Auke Meetsma、Jan Fraanje、Kees Goubitz、Paul C. J. Kamer、Piet W. N. M. van Leeuwen、Dieter Vogt
DOI:10.1021/om050575a
日期:2005.10.1
has been studied by NMR spectroscopy, and the X-ray crystal structures of the resulting complexes 4 and 5 were determined. The 31P NMR spectra of the mononuclear products demonstrate solely cis coordination for both bidentate ligands, with corresponding coupling constants JPt-P of 3810 Hz (cis-[PtCl2(1)], complex 4) and 3712 Hz (cis-[PtCl2(2)], 5). The bite angles P1−Pt−P2 were 98.74 and 105.89°, respectively
两种新型二膦化合物1,2-双(3-(二苯基膦基)-4-甲氧基苯基)苯(1 ; Terphos)和1,2-双(2-二苯基膦基)苯(2)的合成描述了三联苯骨架结构。已经采用简单的合成路线从廉价的起始原料中以高收率获得这些配体。已经通过NMR光谱研究了配体1和2与PtCl 2(cod)的配位,并且确定了所得配合物4和5的X射线晶体结构。在31单核产物的P NMR谱仅显示两个齿配体的顺式配位,相应的偶联常数J Pt - P为3810 Hz(顺式-[PtCl 2(1)],络合物4)和3712 Hz(顺式-[PtCl 2(2)],5)。在变形的方平面复合体中,咬合角P 1 -Pt-P 2分别为98.74°和105.89°。新的二膦化合物已应用于1-辛烯的铂/锡催化加氢甲酰化反应中,并且两个配体均可提供活性和选择性的铂催化剂。