Syntheses of mono- and dinuclear silylplatinum complexes bearing a diphosphino ligand via stepwise bond activation of unsymmetric disilanes
作者:Hidekazu Arii、Makiko Takahashi、Masato Nanjo、Kunio Mochida
DOI:10.1039/c000545b
日期:——
solution of 3b at 100 °C resulted in a similar dimerization to 4b. In addition, a trinuclear platinum complex [Pt3(dppe)3(μ3-SiPh)2] (5) with a trigonal bipyramidal Pt3Si2 core arose from the reaction of 4c with 1 at 60 °C in toluene. Unsymmetric disilanes therefore accomplished the syntheses of various monomeric and dimeric platinum complexes via 1,2-hydrogen and silyl migration to the platinum center
零价 铂络合物[铂(DPPE)(η 2 -C 2 H ^ 4)](1,dppe = 1,2-双(二苯基膦基)乙烷)经乙硅烷HR 1 R 2 SiSiMe 3(a,R 1 = R 2 = Me; b,R 1 = R 2 = Ph; c,R 1 =H,R 2 = Ph)通过将Si-H键氧化加至铂中心得到相应的二硅烷基氢化铂[Pt(dppe)(H)(SiR 1 R 2 SiMe 3)](2a–c)。这1,2-甲硅烷基2a,b的迁移导致形成双(硅烷基)铂络合物[Pt(dppe)(SiHR 1 R 2)(SiMe 3)](3a,b)在25°C下2a和3.86(的一阶速率常数为7.2(2)×10 -4 s -1 4)×10 -4 s -1在40°C下2b,而2c且R 1 =H然后瞬间生成3c的三聚体迅速生成二(μ-亚甲硅基)二铂络合物[Pt(dppe)(μ-SiHPh)] 2(4c)为顺式/反式异构体