Bench-Stable, Substrate-Activated Cobalt Carboxylate Pre-Catalysts for Alkene Hydrosilylation with Tertiary Silanes
作者:Christopher H. Schuster、Tianning Diao、Iraklis Pappas、Paul J. Chirik
DOI:10.1021/acscatal.6b00304
日期:2016.4.1
High-spin pyridine diimine cobalt(II) bis(carboxylate) complexes have been synthesized and exhibit high activity for the hydrosilylation of a range of commercially relevant alkenes and tertiary silanes. Previously observed dehydrogenative silylation is suppressed with the use of sterically unencumbered ligands, affording exclusive hydrosilylation with up to 4000 TON. The cobalt precatalysts were readily
[EN] DEHYDROGENATIVE SILYLATION, HYDROSILYLATION AND CROSSLINKING USING PYRIDINEDIIMINE COBALT CARBOXYLATE CATALYSTS<br/>[FR] SILYLATION DÉSHYDROGÉNANTE, HYDROSILYLATION ET RÉTICULATION À L'AIDE DE CATALYSEURS À BASE DE PYRIDINEDIIMINE-CARBOXYLATE DE COBALT
申请人:MOMENTIVE PERFORMANCE MAT INC
公开号:WO2017019473A1
公开(公告)日:2017-02-02
A process for producing a silylated product comprises reacting a mixture comprising (a) an unsaturated compound containing at least one unsaturated functional group, (b) a silyl hydride containing at least one silylhydride functional group, and (c) a catalyst, optionally in the presence of a solvent, to produce a dehydrogenative silylated product, a hydrosilylated product, or a combination of a dehydrogenative silylated product and a hydrosilylated product, wherein the catalyst is chosen from a pyridine diimine cobalt dicarboxylate complex or a cobalt carboxylate compound, and the process is conducted without pre-activating the catalyst via a reducing agent and/or without an initiator or promoter compound. The present catalysts have been found to be active in the presence of the silyl hydride employed in the silylation reaction.
Tridentate metal catalyst for olefin polymerization
申请人:Razavi Abbas
公开号:US20070117713A1
公开(公告)日:2007-05-24
A process for the preparation of a tridentate transition metal catalyst components incorporating pyridinyl bis-amino or monoamino ligand structures which do not require π bonding of the transition metal through the use of cyclopentadienyl rings. The ligand structure incorporates a heteroatom group that involves nitrogen in one organogroup and either oxygen or nitrogen in another organogroup. The process of preparing the catalyst component involves the reaction of a bis-amino or oxyamino pyridenyl ligand compound with an organo transition metal compound involving a tetrabenzyl ligand or other functional group ligands linked to a transition metal such as titanium zirconium or hafnium.