Described are compounds of the structure R.sub.4-aSi-(Sp-Y).sub.aZ.sub.b, wherein a is an integer from 1 to 4; b is an integer from 0 to (3a); Z, which is absent when b=0, is R or

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wherein each R is halogen, C.sub.1-6 linear or branched alkyl, alkenyl, or alkynyl or C.sub.1-6 linear or branched halo-alkyl, halo-alkenyl, or halo-alkynyl; each Sp C.sub.1-15 linear or branched alkylenyl or C.sub.1-15 linear or branched halo-alkylenyl; and each Y an organic polar group. Also described are electrolyte compositions containing one or more of these compounds.

Described are compounds of the structure R4-.sub.aSi-(Sp-Y).sub.aZ.sub.b, wherein a is integer from 1 to 4; b is an integer from 0 to (3a); Z, which is absent when b R or formula (II), wherein each R is halogen, C.sub.1-6 linear or branched alkyl, alkenyl, or alkynyl or C.sub.1-6 linear or branched halo-alkyl, halo-alkenyl, or halo-alkynyl; each Sp C.sub.1-15 linear or branched alkylenyl or CMS linear or branched halo-alkylenyl; and each Y an organic polar group. Also described are electrolyte compositions containing one or more of these compounds.

(Meth)acrylate-functionalized silicon compounds are easily prepared by the reaction of a (meth)acryloyl-functionalized chlorosilane with an organosilicon compound having silicon-bonded hydroxy groups. The carbon atom adjacent to the resulting OSi linkage is bonded to at least one further carbon, rendering the product stable to hydrolysis despite the COSi linkage.

The instant invention provides a process for the preparation of bis(chloromethyl)dichlorosilane (BCMCS) or bis(chloromethyl) (aryl)chlorosilane (BCMACS) comprising reacting bis(chloromethyl) diphenylsilane and one or more chloride compounds in the presence of a Lewis acid in an inert solvent and under an inert atmosphere. ##STR00001##

A method for making a halosilane compound comprises the steps of: (a) providing a first halosilane compound, (b) providing a reaction vessel containing a halide source disposed inside, (c) feeding the halosilane compound into the reaction vessel, and (d) collecting a product stream from the reaction vessel, where the product stream contains a second halosilane.

Methods of synthesizing fluorosilanes containing cyano-substituted alkyl groups are provided. For example, 3-cyanopropyldimethylfluorosilane may be produced by reacting tetramethyldisiloxane and boron trifluoride to obtain fluorodimethylsilane and then reacting the fluorodimethylsilane with allyl cyanide, in the presence of a hydrosilylation catalyst.

Cyanoalkylfluorosilanes are prepared in exceptionally high yield by the reaction of the corresponding cyanoalkylchlorosilanes with specific metal fluorides. The products are useful in lithium ion battery electrolyte composition.

Cyanoalkylfluorosilanes are prepared in exceptionally high yield by the reaction of the corresponding cyanoalkylchlorosilanes with specific metal fluorides. The products are useful in lithium ion battery electrolyte composition.

(Meth)acrylate-functionalized silicon compounds are easily prepared by the reaction of a (meth)acryloyl-functionalized chlorosilane with an organosilicon compound having silicon-bonded hydroxy groups. The carbon atom adjacent to the resulting OSi linkage is bonded to at least one further carbon, rendering the product stable to hydrolysis despite the COSi linkage.

Provided are complexes useful in the conversion of chloro- and bromo-silanes to highly desired iodosilanes such as H.sub.2SiI.sub.2 and HSiI.sub.3, via a halide exchange reaction. The species which mediates this reaction is an iodide reactant comprising aluminum.