A hydrosilylation reaction catalyst prepared from: a catalyst precursor comprising a transition metal compound, excluding platinum, belonging to group 8-10 of the periodic table, e.g., iron acetate, cobalt acetate, nickel acetate, etc.; and a ligand comprising a carbine compound such as 1,3-dimesitylimidazol-2-ylidene, etc.. The hydrosilylation reaction catalyst has excellent handling and storage properties. As a result of using this catalyst, a hydrosilylation reaction can be promoted under gentle conditions.

Reaction mixtures for silvlating arene substrates and methods of using such reaction mixtures to silyiate the arene substrates are provided. Exemplary reaction mixtures include the arene substrate, a liganded metal catalyst, a hydrogen acceptor and an organic solvent. The reaction conditions allow for diverse substituents on the arene substrate.

A free-radically polymerizable monomer represented by formula (I). Each R.sup.1 independently represents H or a methyl group. Each R.sup.2 independently represents an alkyl group having from 1 to 6 carbon atoms or phenyl. Each Z independently represents a divalent alkylene group having from 3 to 12 carbon atoms. Q represents a divalent alkylene group having from 1 to 36 carbon atoms. A free-radically polymerizable composition comprises the free-radically polymerizable monomer and a free-radical polymerization initiator. A method of using the free-radically polymerizable composition. an at least partially polymerized composition, and an electronic article are also disclosed.

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The present invention relates to a process for hydrosilylating an unsaturated compound with a compound comprising at least one hydrogenosilyl function catalysed by organic cobalt compounds in the presence of a compound (E) having the formula (3): ROH (3), wherein R represents the hydrogen atom or R is chosen from the group consisting of alkyl groups having 1 to 8 carbon atoms, cycloalkyl groups having 6 to 12 carbon atoms, aryl groups having 6 to 12 carbon atoms, aryl-alkyl groups, and silyl groups.

A ligand component is formed according to formula (1):R.sup.1.sub.2PXNC(R.sup.2)Y, wherein R.sup.1 is Ph or Cyc or a C.sub.1-C.sub.20 substituted or unsubstituted ailkyl group; each Ph is a substituted or unsubstituted phenyl group; each Cyc is a substituted or unsubstituted cycloalkyl group; X is an unsubstituted arylene or a C.sub.2-C.sub.3 substituted or unsubstituted alkylene; R.sup.2 is H, methyl or Ph; and Y N is pyridyl, 6-phenylpyridyl or 6-methylpyridyl; with the proviso that when X is a C.sub.2 substituted or unsubstituted alkylene and Y is pyridyl, R.sup.2 is methyl or Ph. A reaction product including the ligand component and a metal precursor is prepared by combining the ligand component with the metal precursor. An activated reaction product is formed by activating the reaction product as a hydrosilylation catalyst.

A neutral or cationic mononuclear ruthenium divalent complex represented by formula (1) can actualize exceptional catalytic activity in at least one reaction among a hydrosilylation reaction, hydrogenation reaction, and carbonyl compound reduction reaction. ##STR00001##
(In the formula, R.sup.1-R.sup.6 each independently represent a hydrogen atom or an alkyl group, aryl group, aralkyl group, organooxy group, monoorganoamino group, diorganoamino group, monoorganophosphino group, diorganophosphino group, monoorganosilyl group, diorganosilyl group, triorganosilyl group, or organothio group optionally substituted by X; at least one pair comprising any of R.sup.1-R.sup.3 and any of R.sup.4-R.sup.6 together represents a crosslinkable substituent; X represents a halogen atom, organooxy group, monoorganoamino group, diorganoamino group, or organothio group; L each independently represent a two-electron ligand other than CO and thiourea ligands; two L may bond to each other; and m represents an integer of 3 or 4.)

Provided is a method of preparing a silylative-reduced N-heterocyclic compound by reducing an N-heteraromatic compound including a sp.sup.2 hybridized nitrogen atom while simultaneously introducing a silyl group into a beta-position with respect to a nitrogen atom of the N-heteroaromatic compound, using a silane compound, in the presence of an organoboron catalyst.

Disclosed herein are dialkyl cobalt complexes containing pyridine di-imine ligands and their use as catalysts for hydrosilylation, dehydrogenative silylation, and/or crosslinking processes.

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.

Hydrosilylation of aliphatically unsaturated compounds (B) with compounds (A) bearing silicon-bonded hydrogen using a metal-containing hydrosilylation catalyst proceeds with higher yields and reduced quantities of byproducts when conducted in the presence of organic salts containing an inorganic or organic anion [Y] and a heteroatom-containing cation [A]+ in amounts of 0.01 mole % to 10 mole % based on the limiting amount of (A) or (B) in moles present in the reaction.