作者:Heindirk tom Dieck、Ingo Kleinwächter、Erhard T.K. Haupt
DOI:10.1016/0022-328x(87)85043-x
日期:1987.3
Displacement of piperidine from Ru(COD)(piperidine)-trans-(H)Cl (I) by 1,4-diaza-1,3-dienes (DAD: RNCR′CR′NR) gives the complexes cis-Ru(COD)(DAD)-(H)Cl (III). With relatively bulky DAD ligands the complexesIII are unstable and are converted into compounds IV, which are also formed fromIII on heating. ComplexesIII are not accessible from Ru(COD)(DAD)Cl2(V). If the analogous starting material involving
1,4-二氮杂-1,3-二烯(DAD:RNCR'CR'NR)从Ru(COD)(哌啶)-反式(H)Cl(I)取代哌啶得到配合物顺式- Ru(COD)(DAD)-(H)Cl(III)。在具有相对大体积的DAD配体的情况下,配合物III不稳定并转化为化合物IV,其在加热时也由III形成。从Ru(COD)(DAD)Cl 2(V)无法获得络合物III 。如果使用涉及环庚三烯Ib代替COD配体的类似起始原料,则保留哌啶阴离子作为配体而不是氢化物。在室温下1刚性不对称III的1 H NMR光谱可以分别看到COD配体的所有12个氢原子。已通过使用2D-H / H相关光谱进行了完整分配。最高的场共振(1.2 ppm)归属于被DAD螯合物屏蔽的烯烃H原子。配合物III催化末端烯烃异构化为顺式/反式混合物()的内部烯烃。在1-烯烃的催化氢化硅烷化过程中,这种异构化是竞争性副反应。III的热分解得到游离的1,3-COD;
Application of polyethyleneglycol (PEG) functionalized ionic liquids for the rhodium-catalyzed hydrosilylation reaction of alkenes
used as a catalytic system for the hydrosilylation reaction of alkenes. The influence of the anion of the ionic liquid has been investigated. It was found that the anion has an impact on the catalytic activity and selectivity. [PEG400DIL][PF6]-[Rh(PPh3)3Cl] shows an improved catalytic performance towards the hydrosilylation reaction of alkenes. The scope of alkenes and recycling of the catalytic system
Hydrosilylation of olefins catalysed by trans-di-µ-hydrido-bis(tricyclohexylphosphine)bis(silyl)diplatinum complexes
作者:Michael Green、John L. Spencer、F. Gordon A. Stone、Constantinos A. Tsipis
DOI:10.1039/dt9770001519
日期:——
The diplatinumcomplexes [Pt(SiR3)(µ-H)[(C6H11)3P]}2] catalyse the addition of silanes R3SiH (R = Me, Et, PhCH2, Ph, OEt, or Cl) to pent-1-ene, hex-1-ene, styrene, allyl chloride, and 2-methylpropene. Reactivity of the silanes is qualitatively in the order: Me2EtSiH ≃ Me2PhSiH ≃ Me2(PhCH2) SiH ClMe2SiH > Me3SiH > Cl3SiH Et3SiH (EtO)3SiH, except for allyl chloride for which it is Cl3SiH > Cl2MeSiH