Reactions of Germylenes and Stannylenes with Halo(hydrocarbyl)- and Chloro(amino)phosphines: Oxidative Addition versus Ligand Transfer
作者:Joseph K. West、Lothar Stahl
DOI:10.1021/acs.inorgchem.7b01275
日期:2017.11.6
faster than germylenes, and these reactions are first-order in both reactants and slowed by stericbulk. Kinetic data and the structures of intermediates and products had suggested an adduct/insertion mechanism for these reactions. To gain further insight into these transformations, the work presented herein was extended to chloro(hydrocarbyl)phosphines with varying organic substituents. These studies
氧化加成(OA)是化学中一个重要的基本步骤,但主要在过渡金属催化的反应环境中进行了研究,并且主要在碳X底物(X =卤素,H)中进行了研究。相比之下,主要的金属化合物经历OA的报道很少,而涉及磷-卤素底物的报道仍然很少。无环和环状的二氮杂亚甲基和-亚锡烷基在氧化加成产物的中间与氯(烃基)膦反应。亚苯乙烯的反应速度比亚甲基苯还快,并且这些反应在两种反应物中都是一阶反应,并且由于空间体积而减慢。动力学数据以及中间体和产物的结构表明了这些反应的加合物/插入机理。为了进一步了解这些转变,本文提出的工作扩展到具有不同有机取代基的氯(烃基)膦。这些研究证实了有关立体空间速率降低作用的先前结论,并且速率对离去基团的依赖性似乎也暗示加合物/插入或S N 2机制。重要的是,这些新数据现在也指向关联的分解途径。在研究过程中,发现脂肪族氯(氨基)膦与卡宾类似物的反应不同,从而为亚二甲苯生成了氧化加成产物,但为亚苯乙烯生成了易位反应。
HYDROSILYLATION PROCESS USING A GERMYLENE-BASED ORGANIC CATALYST
申请人:Elkem Silicones France SAS
公开号:US20190177343A1
公开(公告)日:2019-06-13
The invention relates to a method for hydrosilylating an unsaturated compound comprising at least one ketone function, one aldehyde function, one alkene function and/or one alkyne function, with a compound comprising at least one hydrogenosilyl function, using an organic germanium catalyst.
METHOD OF HYDROSILYLATION IMPLEMENTING AN ORGANIC CATALYST DERIVED FROM GERMYLENE
申请人:BLUESTAR SILICONES FRANCE SAS
公开号:US20170313729A1
公开(公告)日:2017-11-02
The present invention concerns a method for the hydrosilylation of an unsaturated compound comprising at least one ketone function, one aldehyde function, one alkene function and/or one alkyne function, with a compound comprising at least one hydrogen-silyl function implementing an organic catalyst of tri-coordinated germanium.
A subject matter of the present invention is the use as catalyst, in particular in hydrosilylation, of a metal complex including at least one metal atom chosen from the metals of Groups 8, 9 and 10 of the Periodic Table of the Elements and one or more ligands, characterized in that at least one ligand includes a silene structure.
A metal complex including at least one metal atom chosen from the metals of Groups 8, 9 and 10 of the Periodic Table of the Elements and one or more ligands, wherein at least one ligand includes a cyclic silylene structure and a Lewis base which donates an electron pair to the silicon atom of the cyclic silylene structure.