Provided is a means capable of introducing a sufficient amount of a cationic group onto the surface of silica particles even in a case where a silica raw material having a high silica concentration is used while occurrence of gelation is suppressed at the time of or after addition of a silane coupling agent in production of a cationically modified silica dispersion including modifying raw silica using a silane coupling agent. Adding a silane coupling agent having a cationic group to a silica raw material in which a zeta potential shows a negative value, and causing the silica raw material to react with the silane coupling agent to obtain a cationically modified silica.

A method is useful for preparing alkylalkoxysilanes, such as alkylalkoxysilanes, particularly dimethyldimethoxysilane. The method includes heating at a temperature of 150° C. to 400° C., ingredients including an alkyl ether and carbon dioxide, and a source of silicon and catalyst. The carbon dioxide eliminates the need to add halogenated compounds during the method.

A process for synthesis of an organosilicon compound is provided herein. Also, novel organosilicon compounds prepared by the present process is provided herein. The process comprises the reaction of a halosilane with an organofunctional alkyl halide in the presence of a metal catalyst, a promoter, and an optional co-catalyst. The process provides an efficient synthetic route to produce organosilicon compounds. The process also allows synthesis of organosilicon compounds with a plurality of different functional groups.

What is provided is a compound, a pattern forming substrate, a coupling agent, and a pattern formation method. The compound is represented by Formula (1). ##STR00001## [in the formula, X.sup.01 represents a group exhibiting semiconductor characteristics and Y represents a divalent linking group]

The invention provides a method for producing a triorganosilane compound which includes (1) a step of reacting a diorganosilane compound represented by the formula (I):

##STR00001##

with a triflating reagent to obtain a monotriflate compound represented by the formula (III):

##STR00002##

and (2) a step of reacting the monotriflate compound obtained in the step (1) with a metal reagent represented by R.sup.3Li or R.sup.3MgX to obtain a triorganosilane compound represented by the formula (II):

##STR00003##

wherein R.sup.1, R.sup.2 and R.sup.3 are as defined herein.

A branched organosilicon compound is provided having the general formula: (R.sup.1).sub.3—X—[SiR.sub.20].sub.n—SiR.sub.2R.sup.3. In the formula: each R is independently a substituted or unsubstituted hydrocarbyl group; each R.sup.1 is selected from R and —OSi(R.sup.4).sub.3, with the proviso that at least one R.sup.1 is —OSi(R.sup.4).sub.3; each R.sup.4 is selected from R, —OSi(R.sup.5).sub.3, and —[OSiR.sub.2].sub.mOSiR.sub.3; each R5 is selected from R, —OSi(R.sup.6).sub.3, and —[OSiR.sub.2].sub.mOSiR.sub.3; each R.sup.6 is selected from R and —[OSiR.sub.2].sub.mOSiR.sub.3; with the proviso that at least one of R.sup.4, R.sup.5 and R.sup.6 is —[OSiR.sub.2].sub.mOSiR.sub.3; 0≤m≤100; X is a divalent linking group; 1≤n≤10; and R.sup.3 has the general -D-O.sub.p—(C.sub.qH.sub.2qO).sub.r—R.sup.8. In R.sup.3, D is a divalent hydrocarbon linking group, subscript p is 0 or 1, subscript q is independently selected from 2 to 4 in each moiety indicated by subscript r, subscript r is from 1 to 500, and R.sup.8 is selected from substituted or unsubstituted hydrocarbyl groups and H.

Disclosed is an electrolyte for a rechargeable lithium battery including a non-aqueous organic solvent, a lithium salt, and an additive, wherein the additive is a compound represented by Chemical Formula 1. In Chemical Formula 1, each substituent is the same as in the detailed description. A rechargeable lithium battery includes: a positive electrode; a negative electrode; and the electrolyte. ##STR00001##

A phenalene-1-one compound, a photosensitizer composition including the phenalene-1-one compound, an article including the phenalene-1-one compound and/or photosensitizer composition and the use thereof.

A nanoparticle that includes a metal oxide core having the formula M.sub.2O.sub.5 wherein M is either tantalum (V) or niobium (V) and alkylsiloxane ligands surrounding the metal oxide core.

The adhesive composition includes: a cyclic organosilazane compound of the following general formula (1):

##STR00001##

wherein R.sup.1s each independently represent a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms, and p represents an integer of 3 to 8; and a hydrolyzable group-containing organosilicon compound containing an alkoxysilane

compound of the following general formula (2) and/or a partial hydrolytic condensate thereof:

R.sup.2.sub.x—Si(OR.sup.3).sub.4-x   (2)

wherein R.sup.2 represents an unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms and optionally having an oxygen atom, R.sup.3 represents an unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms, and x represents an integer of 0 to 2.