[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.
Diels-Alder (HDA) and enereactions. Methods: Acylnitroso intermediates were readily obtained by hydrogen peroxide oxidation of hydroxamic acids catalyzed by Cu(I)-, Ir(I)- or Ru(II)-complexes and easily reacted with symmetric and asymmetric conjugated dienes beside their reaction with different alkenes which converted to biological active products. Results: The resulted acylnitroso intermediates were efficiently
Improved redox couple for electrochemical and optoelectronic devices
申请人:Ecole Polytechnique Fédérale de Lausanne (EPFL)
公开号:EP2492277A1
公开(公告)日:2012-08-29
The present invention provides an improved redox couple for electrochemical and optoelectronic devices. The redox couple is based on a complex of a first row transition metal, said complex containing at least one mono-, bi-, or tridentate ligand comprising a substituted or unsubstituted ring or ring system comprising a five-membered N-containing heteroring and/or a six-membered ring comprising at least two heteroatoms, at least one of which being a nitrogen atom, said five- or six-membered heteroring, respectively, comprising at least one double bond. The invention also relates to electrolytes and to the devices containing the complex, and to the use of the complex as a redox couple.
A chiral ruthenium(II)–bis(2-oxazolin-2-yl)pyridine catalyst prepared in situ from optically active bis(2-oxazolin-2-yl)pyridine (Pybox-ip) (2) and [RuCl2(p-cymene)]2 (1) exhibited efficient activity for the asymmetriccyclopropanation (ACP) of styrene and several diazoacetates to give the corresponding trans- and cis-2-phenylcyclopropane-1-carboxylates (3 and 4) in good yields (66—87%). A mixture
Para-Derivatized Pybox Ligands As Sensitizers in Highly Luminescent Ln(III) Complexes
作者:Ana de Bettencourt-Dias、Patrick S. Barber、Subha Viswanathan、Daniel T. de Lill、Alexandra Rollett、George Ling、Sultan Altun
DOI:10.1021/ic101034y
日期:2010.10.4
1% and 0.44 ± 0.01 ms for Tb(III) and for PyboxBr they were 35.8 ± 1.6% and 1.46 ± 0.03 ms for Eu(III) and 23.3 ± 1.3% and a double lifetime of 0.79 ± 0.05/0.07 ± 0.01 ms for Tb(III). A linearrelationship between the triplet level energies and the Hammett σ constants was found. Lifetime measurements in methanol as well as the NMR data in both methanol and acetonitrile indicate that all complexes are