Abstract: The present invention is a process for the preparation of hydrolyzable .beta.-cyanoalkylsilanes. More particularly, this invention relates to the catalytic addition of trichlorosilane to .alpha.,.beta.-unsaturated olefinic nitriles to form .beta.-cyanoalkylsilanes. The present process employs a catalyst comprising a ruthenium compound. The preferred catalyst for the present process is a ruthenium compound having at least one tertiary phosphine ligand. The process is conducted at a temperature within a range of about 50.degree. C. to 300.degree. C.

Abstract: The present invention is a process for the preparation of .beta.-cyanoalkylsilanes by contacting a mixture comprising trichlorosilane and an olefinic nitrile with novel phosphinoaliphaticsilane catalysts. The phosphinoaliphaticsilane catalysts are effective in the process as homogeneous catalysts or as supported heterogeneous catalysts. A preferred catalyst for the present process is a phosphinoaliphaticsilane on a solid support. The supported phosphinoaliphaticsilane catalysts have greater activity then the analogous homogeneous catalyst at lower temperatures.

Abstract: The present invention is a process for the preparation of hydrolyzable beta-cyanoalkylsilanes. More particularly, this invention relates to the catalytic addition of silicon hydrides to alpha,beta-unsaturated olefinic nitriles to form beta-cyanoalkylsilanes. The present invention employs a novel catalyst comprising an aminoorganosilane.

Abstract: Novel dimethylpolysiloxane compounds having antibacterial activity are disclosed. Biguanidyl group or cyanoguanidyl group are introduced into dimetylpolysiloxane compounds.

Abstract: The present invention relates to substituted cyclopentanone and cyclohexanone derivatives and substituted cyclopentenone and cyclohexenone derivatives, which are useful as intermediates for pharmaceutical products and agricultural chemicals and especially useful for the synthesis of prostaglandins, and also to a process for producing the same.

Abstract: Cyclic organosiloxanes which contain at least one Si-bonded organic radical and have at least one donor/acceptor .pi.-electron system.

Abstract: The present invention relates to cyclic siloxanes which have at least one group of formula (1) bonded to a silicon atom--(CH.sub.2).sub.x --R"--[--L--A--].sub.y --(L).sub.z --T (1),in which x is an integer having a value of at least 2, preferably having a value of from 2 to 10, R" is a chemical bond or a divalent radical of the formula --COO--, --OOC--, --CH.sub.2 --CH.sub.2 --, --CH.dbd.CH--, --C.tbd.C--, --N.dbd.N--, --N.dbd.N(O)--, --CH.dbd.N--, --N.dbd.CH--, --N.dbd.N--, --N.dbd.N(O)--, --N.dbd.CH--, --CH.dbd.N--, or --Si(R).sub.

Abstract: Benzocyclobutene-1,2-dichlorides, -bromides and -iodides which are substituted in the benzene ring are accessible in good yields and short reaction times by reacting substituted 1,2-(dichloromethyl or dibromomethyl)-benzenes with NaI in acetonitrile as the solvent. They can be used together with dienophils, for example 1,4-quinones, in Diels-Alder reactions.

Abstract: Novel organosilicon compounds having a second order hyperpolarizability coefficient .beta. greater than zero, well suited for use in the field of nonlinear optics, e.g., in telecommunication devices, have the general formula: ##STR1## which n is an integer ranging from 1 to 20; R.sub.1 is an electron donating group; R.sub.2 is an electron accepting group; R.sub.3 is an alkyl radical having from 1 to 8 carbon atoms, a hydrogen atom, an aryl radical, or an R.sub.1 or R.sub.2 radical; and R.sub.4 is an alkyl radical having from 1 to 8 carbon atoms, a hydrogen atom, an aryl radical, or an R.sub.1 radical when R.sub.3 is not an R.sub.2 radical or an R.sub.2 radical when R.sub.3 is not an R.sub.1 radical.

Abstract: The present invention relates to compounds of the formula ##STR1## in which Y represents an organosilicon radical;R" represents a divalent radical which connects the radical Y to the benzene ring via a chain of at least three atoms;X represents a radical of the formula --COOH, --CN, --CHO, --NH.sub.2 or --OH, in which it is possible to block the hydroxyl group with a protecting group;Z represents the same or different substituents in the 2-, 3-, 5- or 6-position to the radical X, preferably hydrogen or halogen atoms; andp represents a value of 0 to 4;and the use of these and related compounds in the preparation of compounds having liquid-crystalline properties.

Abstract: A mesomorphic compound represented by the following formula (I): ##STR1## wherein R.sub.1 denotes a linear or branched alkyl group having 2-16 carbon atoms capable of including one or two non-neighboring methylene groups which can be replaced with ##STR2## and capable of including fluorine substituted for hydrogen; A denotes --A.sub.1 -- or --A.sub.1 --A.sub.2 -- and B denotes --B.sub.1 -- or --B.sub.1 --B.sub.2 -- wherein A.sub.1, A.sub.2, B.sub.1 and B.sub.2 respectively denote ##STR3## wherein Y.sub.1 and Y.sub.2 respectively denote H, F, Cl, Br, --CH.sub.3, --CN or --CF.sub.3 ; Z.sub.1 and Z.sub.2 respectively denote ##STR4## Z.sub.3 denotes ##STR5## R.sub.2, R.sub.3 and R.sub.4 respectively denote a linear or branched alkyl group having 1-16 carbon atoms including a methylene group which can be replaced with ##STR6## with proviso that it is not adjacent to the silicon atom; p and q are respectively 0 or 1 with proviso that p+q is 0 or 1; and n is an integer of 1-12.

Abstract: The invention relates to silane derivatives of the formula I ##STR1## their preparation by hydrosilylation of corresponding (meth)acrylamides and their use as silylating agents.

Abstract: An organosilicon compound having a Si--C--C--Si bond, a C.dbd.C--Si bond and/or a CH--CH--Si bond is prepared by reacting an olefin or a substituted olefin with a disilane in the presence of a platinum-containing catalyst. The resulting compound can be further treated with an alkyl lithium, an aryl lithium or a Grignard reagent.

Abstract: Novel propargyl esters are prepared by a base catalyzed condensation reaction of propargyl esters of carboxylic acids containing a labile hydrogen atom at the alpha position relative to the carboxy group, and a terminal aromatic hydrocarbon radical that is linked to the carboxy group through a sequence of carbon atoms containing at least one carbon-to-carbon double bond. If more than one of these double bonds are present they form a conjugated sequence. Novel organosilicon compounds are prepared by reacting these propargyl esters with an organohydrogensilane or an organohydrogensiloxane. The organosilicon compounds undergo a reversible crosslinking reaction in the presence of ultraviolet light.

Abstract: A method is provided for preparing preceramic polymers and silicious ceramic materials which derive therefrom. The preceramic polymers are polysiloxanes which are synthesized by catalytically activating Si-H bonds in a hydridosiloxane starting material and replacing the activated hydrogen atoms with non-hydrogen substituents. These preceramic polysiloxanes are pyrolyzed in a selected atmosphere to give the desired ceramic product. Ceramic products which may be prepared by this technique include silica, silicon oxynitride, silicon carbide, and metal silicates.

Abstract: The present invention is a process for the preparation of hydrolyzable .beta.-cyanoalkylsilanes. More particularly, this invention relates to the catalytic addition of hydrolyzable silicon hydrides to .alpha.,.beta.-unsaturated olefinic nitriles to form .beta.-cyanoalkylsilanes. The instant process employs novel catalysts comprising a diamine and non-activated copper, selected inorganic copper compounds, or di-coordinate organic copper compounds.

Abstract: The present invention is a process for the preparation of hydrolyzable .beta.-cyanoalkylsilanes. More particularly, this invention relates to the catalytic addition of hydrolyzable silicon hydrides to .alpha.,.beta.-unsaturated olefinic nitriles to form .beta.-cyanoalkylsilanes. The instant process employs a catalyst comprising a diamine and supported copper or a supported copper compound.

Abstract: Novel monocyclic terpene derivative of the formula: ##STR1## wherein R is hydrogen atom, trimethylsilyl group or 1-ethoxyethyl group, and novel intermediate therefor. The terpene derivative (I) is a useful intermediate for preparing Sarcophytol A having an anti-carcinogenesis promoter activity and an antitumor activity.

Abstract: A naphthalocyanine derivative having as substituents at least one group of a formula: SR.sup.1 wherein R.sup.1 is --(CR.sup.2 R.sup.3).sub.x SiR.sup.4 R.sup.5 R.sup.6, in which R.sup.2 to R.sup.6 are H, alkyl groups, etc. is excellent in solubility in saturated hydrocarbon solvents and in absorption of semiconductor laser lights and thus, is suitable for producing optical recording media.

Abstract: The present invention is a process for the preparation of hydrolyzable .beta.-cyanoalkylsilanes. More particularly, this invention relates to the catalytic addition of silicon hydrides to .alpha.,.beta.-unsaturated olefinic nitriles to form .beta.-cyanoalkylsilanes. The instant process employs a catalyst comprising a diamine and copper or a copper compound. The copper or copper compond may be retained on a solid support. The proces rate and yield of .beta.-cyanoalkylsilanes is increased by running the process in essentially an oxygen free environment.

Abstract: A process for preparing a perfluoroalkyl-substituted compound is disclosed. The process comprises reacting a halopolyfluoroalkane having 1 to 20 carbon atoms with a compound selected from the group consisting of (1) a substituted or unsubstituted ethylene, (2) a substituted or unsubstituted acetylene and (3) a substituted or unsubstituted allylsilane, in the presence of a metal-carbonyl complex of the metal of the Group VIII of the Periodic Table. Alternatively, the reaction between the halopolyfluoroalkane and the substituted or unsubstituted allylsilane is effected under radical generating condition.

Abstract: Organosiloxanes (1) of the general formulaR.sup.1.sub.4-n Si(OSiR.sub.3).sub.n,in which R is the same or different and represents a hydrogen atom or a monovalent hydrocarbon radical having from 1 to 18 carbon atom(s) per radical or a substituted monovalent hydrocarbon radical having from 1 to 18 carbon atom(s) per radical, R.sup.1 represents R or a chlorine atom, and n is 3 or 4, are prepared by reacting organodisiloxanes (2) of the general formula(R.sub.3 Si).sub.2 O,with chlorosilanes (3) of the general formulaR.sub.4-n SiCl.sub.n,in which R and n are the same as above, in the presence of phosphonitrile chlorides (4) and cocatalysts (5), in which the cocatalysts (5) are used concomitantly with the phosphonitrile chlorides (4) and are selected from the group consisting of amides of the general formulaX--C(O)--R.sup.2,in which R.sup.

Abstract: A compound of formula I ##STR1## wherein R.sub.1 is C.sub.1 -C.sub.4 alkyl, phenyl or benzyl,R.sub.2 is C.sub.1 -C.sub.4 alkyl, phenyl or benzyl,a is 0, 1 or 2,R.sub.3 is linear or branched unsubstituted or OH-substituted C.sub.1 -C.sub.12 alkylene or is phenylene,R.sub.5 is the divalent radical, diminished by the --CO--O group, of a lactone having a total of 4 to 7 ring members and containing at least one chiral carbon atom and corresponding predominantly to an optically active enantiomeric form,R.sub.4 is a direct bond, C.sub.1 -C.sub.4 alkyl--CH or CF.sub.3 --CH, andY is phenyl, naphthyl, fluorenyl or anthryl, each unsubstituted or substituted by C.sub.1 -C.sub.12 alkyl, C.sub.1 -C.sub.12 alkoxy, halogen, --CN or --NO.sub.2.These compounds are suitable for the preparation of stationary phases for the chromatographic separation of chiral compounds.

Abstract: Process for preparing a silyl ketene acetal adduct, the process comprising contacting and reacting a silyl ketene acetal and an .alpha.,.beta.-unsaturated compound in the presence of a mercury- or Lewis acid-containing catalyst, for example, HgI.sub.2.

Abstract: A method is provided for silylating aromatic acylhalide by effecting reaction between an aromatic acylhalide and halogenated polysilane in the presence of an effective amount of a supported transition metal catalyst, such as a transition metal catalyst supported by an organic or inorganic substrate.

Abstract: A process for the neutralization, clarification and decolorization of organosilanes or organosilicones derived from the reaction of an organosilane or a hydropolysiloxane with an aliphatically unsaturated compound in the presence of an acidic platinum catalyst, a process for the conversion of a soluble platinum catalyst into an insoluble form and a process for the recovery of a platinum catalyst from an insoluble anion exchange resin which comprises:(a) contacting a reaction mixture of the organosilane or organosilicone with a basic anionic exchange resin having a free amino or quaternized ammonium salt functionality in an insoluble polymeric matrix under conditions suitable to bind the soluble platinum catalyst to said resin;(b) separating said resin containing bound platinum catalyst from the organosilane or organosilicone reaction mixture and, optionally,(c) treating the separated resin with an inorganic base to convert the bound platinum catalyst to a recoverable salt or(d) subjecting the resin containing

Abstract: Transition metal-bis-phosphite catalyzed carbonylation processes, especially hydroformylation, as well as transition metal-bis-phosphite compositions, bis-phosphite ligands and transition metal-bis-phosphite catalysts.

Abstract: In a method of preparing cyanoalkyl-akoxysilanes, which is suitable for the production of these silanes on a large technical scale, the reaction of a chloroalkyl-alkoxysilane with an alkali metal cyanide in the presence of a solvent takes place in a stirring reactor which is provided with means for loading these starting materials and with an outlet opening for the alkali metal chloride by-product, and which is connected through a bypass valve to a column with a superimposed condenser. After the reaction in the reactor has ended, first the solvent is distilled out through the column and then the main part of the cyanosilane, and then the rest of the cyanosilane is distilled out while bypassing the column. The alkali metal chloride is then removed from the reactor through a lock.

Abstract: A method of producing a 4-halo-2-(substituted or unsubstituted)hydroxyimino-3-oxobutyric acid ester or amide, which is a synthetic intermediate of value for the production of cephalosporins containing an aminothiazole group, characterized by reacting a 2-(substituted or unsubstituted)-hydroxyimino-3-oxobutyric acid or an ester or amide thereof with a silylating agent and reacting the resulting novel 2-(substituted)hydroxyimino-3-silyloxy-3-butenoic acid ester or amide with a halogenating agent.

Abstract: Novel Isoprene Derivatives which have mucosa-protective and gastric acid secretion-inhibiting properties and are useful for combatting ulcers both by treating and as a prophylaxis against gastric and/or duodenal ulcers.

Abstract: Novel substituted organosilicon carboxylates characterized by the following formula: ##STR1## wherein M is a monovalent cation: Z represents a moiety hydrolyzable to silanol; R.sup.

Abstract: Bisbenzocyclobutene monomers bridged by a polyorganosiloxane group. The monomers are liquid at room temperature.

Abstract: A method is provided for silylating organic substrates, utilizing a halogenated polysilane, such as 1,1,2,2-tetrachloro dimethyldisilane and an aromatic acyl halide, for example, trimellitic anhydride acid chloride in the presence of a transition metal catalyst.

Abstract: A silicone/silicate-containing antifreeze characterized by dilute aqueous stability includes substituted organosilicon carboxylates characterized by the following formula: ##STR1## wherein M is a monovalent cation such as, for example, sodium; Z represents a moiety hydrolyzable to silanol; R.sup.1 represents hydrogen, a monovalent hydrocarbon radical such as methyl, ethyl, phenyl, and the like or a substituted monovalent hydrocarbon radical; a has a value from 0 to 20, b has a value of 1 or 2, c has a value of 0 or 1, n has a value of 2, 3, or 4, and m has a value of from 3 to 15 when a is other than 0 and from about 7 to about 15 when a is 0.

Abstract: A composition having the general formula ##STR1## wherein each R is independently selected from hydrogen, substituted and unsubstituted organic radicals, and radicals of the formula --R.sup.1 NR.sub.2 where R is as previously defined; R.sup.1 is a divalent organic radical; each R.sup.2 is independently selected from substituted and unsubstituted alkyl radicals having at least 12 carbon atoms; each R.sup.3 is an independently selected organic radical having from 1 to 13 carbon atoms; and a, b, and c are, independently, 0 or a positive integer.

Abstract: A method for purifying alkoxysilane with the general formula, R.sub.m Si(OR.sup.1).sub.4-m. The method significantly lowers the level of non-hydrolyzable chlorine-based impurities, as well as the level of hydrolyzable chlorine-based impurities. The method comprises: (i) heating the alkoxysilane in the presence of a treating agent selected from a group which consists of acid clays and metal halides; (ii) contacting the alkoxysilane with a neutralization agent; and (iii) separating the alkoxysilane from the unused neutralization agent and by-products of neutralization.

Abstract: The reaction of dimethylformamide, R.sup.1 R.sup.2 R.sup.3 SiX and RY in the presence of zinc or the reaction of dimethylformamide, R.sup.1 R.sup.2 R.sup.3 SiX and a zinc compound RZnY.yL affords hemiaminals of formula I ##STR1## R is e.g. polyhalogenated alkyl containing at least one fluorine atom; R.sup.1, R.sup.2 and R.sup.3 are e.g. alkyl; L is a ligand; X is chlorine or bromine; Y is chlorine, bromine or iodine and y is 1 or 2.

Abstract: A colloidal hydrosilylation catalyst is provided by effecting reaction between a silicon hydride or a siloxane hydride and a Pt(O) or Pt(II) catalyst. The colloidal catalyst forms stable mixtures with olefinically unsaturated organopolysiloxanes.

Abstract: Monosilylated aminophenylethylamine derivative of the formula ##STR1## in which X and Y each independently is hydrogen or halogen,R.sub.1 is the radical ##STR2## R.sub.2 is hydrogen or an aliphatic hydrocarbon radical having up to 10 C atoms,R.sub.3 is hydrogen, an aliphatic hydrocarbon radical which can optionally be substituted by halogen, a phenyl radical which can optionally be substituted by halogen, hydroxyl, alkyl, aryl, alkoxy, alkylthio, optionally substituted phenoxy, optionally substituted phenylthio, cyano or trifluoromethyl, or a heterocyclic radical, or, together with R.sub.2 is a nitrogen-containing saturated heterocyclic radical, andR.sub.4, R.sub.5 and R.sub.6 each independently is an alkyl radical,or physiologically tolerated salts thereof, promote the growth of animals.

Abstract: A class of novel organosilane compounds are disclosed as represented by the general formulaRSi(OCH.sub.2 CF.sub.3).sub.3,in which R is an atom or group selected from the class consisting of a hydrogen atom, unsaturated monovalent aliphatic hydrocarbon groups having from 2 to 20 carbon atoms, monovalent aryl groups and monovalent organic groups having from 3 to 20 carbon atoms and containing at least one hetero atom, i.e. an atom other than carbon and hydrogen atoms, such as oxygen, halogens, sulfur and nitrogen, the said hetero atom-containing organic group being bonded to the silicon atom through a carbon-to-silicon linkage. Several particular compounds belonging to the class were synthesized and identified.

Abstract: Novel and known functionally substituted phenoxyalkyl-, thiophenoxyalkyl- and pyridyloxyalkylsilanes are prepared by reacting substantially equimolar amounts of an alkali- or alkaline earth metal phenoxide, thiophenoxide or pyridyloxide with a haloalkylsilane under anhydrous conditions using a dipolar, aprotic solvent in combination with a liquid hydrocarbon.

Abstract: Nonhygroscopic, anionic pentacoordinate silicate, for example, ##STR1## soluble in commonly used organic solvents, and useful as a source of fluoride, cyanide or azide anion and as a catalyst or cocatalyst in polymerization systems, for example, the polymerization of methyl methacrylate.

Abstract: A composition having the general formula ##STR1## wherein each R is independently selected from hydrogen, substituted and unsubstituted organic radicals, and radicals of the formula --R.sup.1 NR.sub.2 where R is as previously defined; R.sup.1 is a divalent organic radical; each R.sup.2 is independently selected from substituted and unsubstituted alkyl radicals having at least 12 carbon atoms; each R.sup.3 is an independently selected organic radical having from 1 to 13 carbon atoms; and a, b, and c are, independently, 0 or a positive integer.

Abstract: Compounds of the formula ##STR1## a pharmaceutically or agriculturally acceptable acid addition salt thereof wherein R is 5-chloro-2-pyridyl, phenyl or phenyl substituted by from 1 to 3 substituents, each independently selected from F, Cl, Br, I, CF.sub.3, (C.sub.1 -C.sub.4)alkyl and (C.sub.1 -C.sub.4)alkoxy; and R.sup.1 is H, Cl, phenyl, phenyl substituted by from 1 to 3 substituents each independently selected from F, Cl, Br, I and CF.sub.3 or a heterocyclic group linked to the adjacent CF.sub.2 group by a ring carbon atom; method for their use in combatting fungal infections in plants, seeds and animals, including humans, and pharmaceutical and agricultural compositions containing them.

Abstract: In the process of preparing compounds containing silicon-carbon bonds by the hydrosilation reaction of a hydrosilyl reactant with an olefinic reactant in the presence of a soluble platinum catalyst, the improvement which comprises operating the process at a temperature below 150.degree. C. and employing, as a reaction promoter, a hydrosilyl compound whereby said hydrosilyl reactant has a composition different from the composition of said promoter and whereby said promoter provides (i) a 20% increase in the amount of silicon-carbon compounds, or (ii) a 20% increase in reaction rate relative to an unpromoted reaction.

Abstract: A process for preparing dimethylsilyl dicyanide comprising reacting trimethylsilyl cyanide with dimethylsilyl dichloride. Advantageously the trimethylsilyl chloride formed as a by-product in the course of the reaction is continuously removed from the reaction, the trimethylsilyl cyanide starting material is produced by reacting trimethylsilyl chloride with an alkali metal cyanide, and the by-product trimethylsilyl chloride of the principal reaction is recycled to the preparation of trimethylsilyl cyanide.

Abstract: Stabilizers for inorganic silicate corrosion inhibitor additives in antifreeze/coolant formulations are described. The stabilizers have the structure ##STR1## where n is an integer from 1 to 20 and R is a solubilizing agent. The solubilizing group may be a cyano-terminated group, a diol ether group, an acid group, an amide group, a group which will yield a diol on hydrolysis, among others. These stabilizers help prevent the inorganic silicate additives from precipitating out and thus extend the shelf life of antifreeze formulations into which they are incorporated.

Abstract: Nonhygroscopic, anionic pentacoordinate silicate, for example, ##STR1## soluble in commonly used organic solvents, and useful as a source of fluoride, cyanide or azide anion and as a catalyst or cocatalyst in polymerization systems, for example, the polymerization of methyl methacrylate.

Abstract: Trimethylsilyl cyanide, (CH.sub.3).sub.3 Si-CN, is obtained by reacting trimethylsilyl chloride with an approximately equimolar amount of an alkali metal cyanide in the absence of water and in the presence of catalytic, sub-stoichiometric amounts of both an alkali metal iodide and N-methylpyrrolidone, at a temperature of from 15.degree.-25.degree. C.

Abstract: Organopolysiloxane lubricant compositions comprising a polysiloxane chain containing silicon-bonded hydrocarbon radicals and silicon-bonded ester radicals. The ester functional organopolysiloxanes are obtained by reacting an allyl ester, by Si-olefin addition, with an organohydrogenpolysiloxane in the presence of a platinum catalyst.