The present invention relates to a compound of formula (I) below:

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in which:

R.sub.1 represents, in particular, an alkylene group comprising from 1 to 6 carbon atoms;

R.sub.2 and R.sub.3 are, in particular, H;

n is 0, 1, 2 or 3; and R.sub.4 is chosen from the group consisting of: NO.sub.2, OR.sub.a, SR.sub.a and NR.sub.aR.sub.b, wherein R.sub.a and R.sub.b are as defined above;

R.sub.5 and R.sub.6, identical or different, represent an alkyl or alkoxy group comprising from 1 to 6 carbon atoms; and

R.sub.7, R.sub.8 and R.sub.9, identical or different, represent an alkyl group comprising from 2 to 6 carbon atoms.

A process produces a C.sub.3- to C.sub.20-alkyltrialkoxysilane by hydrosilylation, wherein alkoxy represents methoxy, ethoxy or propoxy. Initially, a mixture is charged of at least one hydroalkoxysilane from the group of hydrotrialkoxysilane, hydroalkyldialkoxysilane, and hydrodialkylalkoxysilane, and a Pt catalyst. The mixture is then heated to a temperature of 30 C. to 60 C. Subsequently, with mixing, an omega-unsaturated or mono-unsaturated C.sub.3- to C.sub.20-hydrocarbon, at least one carboxylic acid and at least one alcohol as cocatalysts are added to the mixture. The mixture is then reacted and subsequently worked up to obtain the product.

The present invention relates to a perfluoropolyether group-containing silane compound represented by formula (1): RfX.sup.1X.sup.2NQ.sub.kT.sub.2-k, (1), and a method for preparing the same. The present invention also relates to a perfluoropolyether group-containing silane compound represented by formula (2),

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and a method for preparing the same. The present invention also relates to a perfluoropolyether group-containing silane compound represented by formula (3),

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and a method for preparing the same. The perfluoropolyether group-containing silane compound of the present invention can be used for a surface treatment agent so that the substrates such as glass etc processed by the surface treatment agent are excellent in anti-fouling, anti-fingerprint, scrape resistant and abrasion resistant performances. Moreover, the preparation method of each of the compounds of the present invention is simple in process, easy to operate and implement.

A fluoro(poly)ether group-containing silane compound represented by any of the formulae (A1), (A2), (B1), (B2), (C1), or (C2). In the formulae, PFPE is each independently at each occurrence a group represented by the formula: (OC.sub.3F.sub.6).sub.d, wherein the repeating unit OC.sub.3F.sub.6 of the formula includes a branched structure, and d is an integer of 2 or more and 200 or less. The symbols are as defined in the description.

Nanoparticles that can be used as hydrosilylation and dehydrogenative silylation catalysts. The nanoparticles have at least one transition metal with an oxidation state of 0, chosen from the metals of columns 8, 9 and 10 of the periodic table, and at least one carbonyl ligand, preferably a silicide.

There is provided herein a method for the manufacture of alkoxysilyl-containing thiocarboxylic acid ester which comprises reacting a thioester with a mercapto-functional alkoxysilane and/or an alkali metal salt, an alkaline earth metal salt, a trisubstituted ammonium salt of an alkoxysilyl-functional thiolate which uses economical and readily available reagents, avoids the use of phosgene or thionyl chloride reagents and produces byproducts that may be recycled.

Novel epoxy-functional alkoxysilanes have, for example, formulae II, III, IV, V, and VI.

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Provided is an organic silicon compound represented by formula (1), which when added to a rubber composition, can improve the wet traction performance of a cured product of the rubber composition, and significantly reduce a hysteresis loss of the cured product, and provides a rubber composition that can be used to implement a desired tire having high fuel efficiency.

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(In the formula, each R.sup.1 independently represents an alkyl group having 1-10 carbon atoms or an aryl group having 6-10 carbon atoms, each R.sup.2 independently represents an alkyl group having 1-10 carbon atoms or an aryl group having 6-10 carbon atoms, f represents a number equal to or larger than 0, e, g, and h each independently represent a number equal to or larger than 0, and m represents an integer of 1-3. Note that the repeating units can be present in any order.)

By using this organosilane compound represented by formula (1), a surface treatment agent that contains said (hydrolyzable) organosilane compound and/or a partial (hydrolysis) condensate thereof can form a cured film which exhibits excellent lipophilic properties and has a refractive index similar to the refractive index of sebum.

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(A is any one of C(O)OR.sup.1, C(O)NR.sup.1.sub.2, C(O)SR.sup.1 and P(O)(OR.sup.1).sub.2; R.sup.1 is a hydrogen atom, an alkyl group, an aryl group or an aralkyl group; Y is a divalent organic group; R is an alkyl group or a phenyl group; Xis a hydroxyl group or a hydrolyzable group; and n is 1-3.)

To provide an organic silicon compound having an average structural formula (1).

##STR00001##

(Z represents a 2 to 20-valent group containing an organosiloxane structure, each R.sup.1 independently represents an alkyl group or an aryl group, each R.sup.2 independently represents an alkyl group or an aryl group, each R.sup.3 independently represents a hydrogen atom, an alkyl group, an alkoxy group, or an O. (oxy radical), each R.sup.4 independently represents a hydrogen atom or an alkyl group, each A.sup.1 independently represents a single bond or an alkylene group free of a hetero atom, each A.sup.2 independently represents a single bond or a divalent linking group containing a hetero atom, m is a number of 1 to 3, p is a number of 1 to 10, q is a number of 1 to 10, and p+q represents a number satisfying from 2 to 20 corresponding to the valency number of Z.)