Abstract: A process for preparing siloxanes wherein (a) at least one hydridosilicon compound selected from (a1) compounds of general formula (I), and/or from (a2) compounds of general formula (I?), and (b) at least one carbonyl compound selected from (b1) compounds of the general formula (II), and/or (b2) compounds of general formula (II?), and (c) at least one cationic compound of general formula (III) are brought into contact and reacted with one another.

Abstract: Polymeric alkyl silicates along with processes for preparing the same.

Abstract: A process for preparing siloxanes, wherein at least one alkoxy-organosilicon compound selected from compounds of the general formula (I) and/or from compounds of the general formula (II) is/are reacted in the presence of a cationic silicon and/or germanium compound at a temperature of ?40 to 250° C.

Abstract: Alkyl-silicates and alkyl-silicate-containing organosilicon compounds. The alkyl-silicate-containing organosilicon compound includes at least 90% by weight, preferably at least 95% by weight, of alkyl silicates of average formula (I) Where the radicals Rx are each independently selected from radicals that meet at least one of the following conditions: (a) where Rx is a substituted or unsubstituted, C4-C20 hydrocarbon radical that is branched at the ?-carbon atom, (b) where Rx is a substituted or unsubstituted, C5-C20 hydrocarbon radical that is doubly branched at the ?-carbon atom, and/or (c) where Rx is an unsubstituted or alkyl-substituted cyclopentyl, cyclohexyl or cycloheptyl radical having a total of not more than 9 carbon atoms. Where the radicals R3 are each independently selected from (i) hydrogen, (ii) methyl radical, and (iii) ethyl radical.

Abstract: The invention relates to halogenated tetrasilylboranates of the general formula Mz+[B(SiRmXn)4?]z??(I), where the radicals and indices have the meanings indicated in claim 1, with the proviso that m+n=3, processes for the production thereof and also the use.

Abstract: Active substances for which controlled release is desired, are released by a process in which a shaped body (S) containing a composition (C) comprises a silicone-containing polymer (P) containing at least one Si—C bonded amino acid group and active substance (A) is contacted with water, resulting in the release of active substance (A) from the composition (C).

Abstract: A mixture M includes at least one compound A selected from (a1) a compound of the general formula (I): R1R2R3Si—H, and/or (a2) a compound of the general formula (I?): (SiO4/2)a(RxSiO3/2)b(HSiO3/2)b?(Rx2SiO2/2)c(RxHSiO2/2)c?(H2SiO2/2)c?(Rx3SiO1/2)d(HRx2SiO1/2)d?(H2RxSiO1/2)d?(H3SiO1/2)d??, and at least one compound B selected from (b1) a compound of the general formula (II): R4R5R6Si—O—R7, and/or (b2) a compound of the general formula (II?): Rx3Si—O[—SiRx2—O]m—[Si(OR73)Rx—O]n—SiRx3, and at least one compound C selected from the cationic germanium(II) compound of the general formula (III): ([Ge(II)Cp]+)aXa?.

Abstract: Aminopropylalkoxysilanes of the formula H2N—CR2R3—CHR1—CH2—SiR4R5(OR6)??I, are synthesized by hydrosilylating silazanes of the formulae and mixtures thereof, in the presence of a catalyst containing rhodium and/or iridium compounds, and then reacted with alcohol to form an aminopropylalkoxysilane.

Abstract: A mixture M includes at least one compound A, selected from (a1) a compound of the general formula (I) and/or (a2) a compound of the general formula (I?), at least one compound B, selected from (b1) a compound of the general formula (II) and/or (b2) a compound of the general formula (II?) and/or (b3) a compound of the general formula (II?), and at least one compound C, selected from cationic germanium(II) compounds of the general formula (III).

Abstract: Siloxanes are prepared by reacting: a compound A with a compound B or a compound A with a compound C or a compound B with a compound C or a compound C alone, in the presence of a compound D at ?40° C., wherein compound A is a silane or a siloxane having at least one silicon-bonded hydrogen atom, compound B is a silane or a siloxane having at least one silicon-bonded alkoxy moiety, compound C is a silane or a siloxane having at least one silicon-bonded hydrogen atom and at least one silicon-bonded alkoxy moiety, and compound D is a cationic Si(II) compound.

Abstract: Aminopropylalkoxysilanes of the formula H2N—CR2R3—CHR1—CH2—SiR4R5(OR6) ??I, are synthesized by hydrosilylating silazanes of the formulae and mixtures thereof, in the presence of a catalyst containing rhodium and/or iridium compounds, and then reacted with alcohol to form an aminopropylalkoxysilane.

Abstract: Bicyclic guanidines are prepared by reacting dialkylenetriamines with dialkylcarbonates in the presence of a silane of the formula Si(ORx)oRY(4?o) ??(IV) and/or their partial hydrolysates, with the proviso that contain minimally one unit IV which is a monovalent optionally substituted hydrocarbon radial with 3 to 10 carbon atoms.

Abstract: Cationic silicon (ii) compounds are easily formed by reaction of ?-bonded cyclopentadienyl silicon (II) compound with a carbo-cation. The compounds have catalytic uses, particularly as a hydrosilylation catalyst.

Abstract: Siloxanes are prepared by reacting: a compound A with a compound B or a compound A with a compound C or a compound B with a compound C or a compound C alone, in the presence of a compound D at ?40° C., wherein compound A is a silane or a siloxane having at least one silicon-bonded hydrogen atom, compound B is a silane or a siloxane having at least one silicon-bonded alkoxy moiety, compound C is a silane or a siloxane having at least one silicon-bonded hydrogen atom and at least one silicon-bonded alkoxy moiety, and compound D is a cationic Si(II) compound.

Abstract: The invention relates to a hydrosilylatable mixture M containing: (A) a compound with at least one hydrogen atom directly bonded to Si, (B) a compound containing at least one carbon-carbon multiple bond, and (C) a compound containing at least one cationic Si(II) group. The invention also relates to a method for hydrosilylating the mixture M.

Abstract: Cationic silicon (II) compounds catalyze reaction of organosiloxanes bearing lateral Si—H functions to crosslink the polymers. Hydridosilanes may also be prepared by this reaction. The cationic silicon (II) compounds contain a silicon (II) moiety where silicon is ?-bonded to a cyclopentadienyl anion.

Abstract: The invention provides a mixture M containing compound A which contains at least one hydrogen atom bound directly to Si, compound B which contains at least one carbon-carbon multiple bond, compound C which contains at least one cationic Si(II) group and compound D which contains at least one alkoxy group bound directly to silicon, and also a method for hydrosilylating the mixture M, wherein the mixture M is heated.

Abstract: The invention relates to a method for absorbing liquids (P) containing compounds (V) selected from water and alkanols, the oxygen content of which in weight percentage is at least 27%, said content being present in the loan of hydroxy groups or hydroxy and ether groups, into a solid silicone-containing polymer (P) which contains at least one siloxane unit of the general formula I (R1b(X)cSiO[4?(b+c)]/2) and no units or at least one unit of the general formula II (R2aSiO4?a)/2), in which R1, R2, x, a, b, and c have the meanings described in claim 1, wherein the liquids (P) are brought into contact with the solid silicone-containing polymer (P).

Abstract: Subject-matter of the invention is a hydrosilylatable mixture M comprising compound (C), which contains at least one carbocationic structure, and compound (A), which has at least one directly Si-bonded hydrogen atom and compound (B), which contains at least one carbon-carbon multiple bond, or compound (AB), where between the Si—H group and the nearest adjacent carbon atom of the carbon-carbon multiple bond there are at least 6 atoms, or compound (A) and compound (AB) or compound (B) and compound (AB), where the compounds (A), (B) and (AB) are defined in claim 1.

Abstract: The invention relates to a method for producing hydridosilanes, in which siloxanes containing Si—H groups are reacted in the presence of a cationic Si(II) compound as a catalyst.