The present invention provides processes for the synthesis of organic azides, intermediates for the production thereof, and compositions related thereto.

A new class of compounds known as chalcogenosilacyclopentanes is described. These compounds are five-membered ring structures containing a silicon-selenium or silicon-tellurium bond, as shown in Formulas (I) and (II). In these compounds, the substituents on the silicon and on the ring carbons may be hydrogen, alkyl, alkoxy, aromatic, or ether groups. The chalcogenosilacyclopentane compounds undergo ring-opening reactions with hydroxyl and other protic functionalities and may be used to prepare substrates that are amenable to thin film deposition techniques such as ALD and CVD. ##STR00001##

A new class of compounds known as chalcogenosilacyclopentanes is described. These compounds are five-membered ring structures containing a silicon-selenium or silicon-tellurium bond, as shown in Formulas (I) and (II). In these compounds, the substituents on the silicon and on the ring carbons may be hydrogen, alkyl, alkoxy, aromatic, or ether groups. The chalcogenosilacyclopentane compounds undergo ring-opening reactions with hydroxyl and other protic functionalities and may be used to prepare substrates that are amenable to thin film deposition techniques such as ALD and CVD.

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Disclosed herein are electrolyte compositions comprising a fluorinated solvent, at least one silyl oxalate represented by the formulas RR′Si(C.sub.2O.sub.4), wherein R and R′ are each the same or different from each other and independently selected from C.sub.1-C.sub.8 alkyl, C.sub.2-C.sub.8 alkenyl, C.sub.2-C.sub.8 alkynyl, or C.sub.6-C.sub.10 aryl radical, optionally comprising at least one substituent selected from halogen, hydroxyl, alkoxy, carbonyl, and carboxyl groups; and LiPF6. Also disclosed herein are electrolyte compositions comprising a fluorinated solvent and a lithium oxalato phosphate salt represented by the formula LiPF.sub.(6-2q)(C.sub.2O.sub.4).sub.q, wherein q is 1, 2 or 3; wherein the oxalato phosphate salt comprises at least a portion that is derived from at least one silyl oxalate as defined herein. The electrolyte compositions are useful in electrochemical cells, such as lithium ion batteries.

Organosilicon quaternary ammonium compounds, their formulations, including powdered and solid formulations, and methods of use to treat infections in humans and animals.

Organosilicon quaternary ammonium compounds, their formulations, including powdered and solid formulations, and methods of use to treat infections in humans and animals.

A method for the preparation of isocyanates in which: (i) a first organosilicon compound having at least one silicon atom Si.sup.1 and a unit of formula G-I bound thereto

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is converted to a third organosilicon compound having a unit of formula G-II

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by silylation of the NH group of the unit of formula G-I with a second organosilicon compound having one silicon atom Si.sup.2; and (ii) the third organosilicon compound is reacted to an isocyanate by thermolysis, whereby the unit of formula G-II is converted to an isocyanate group.

Provided is a method for preparing L-glufosinate from an L-homoserine derivative compound, the method including a step (step a) of preparing a compound of Chemical Formula 2 from a compound of Chemical Formula 1, and a step (step b) of preparing a compound of Chemical Formula 3 from the compound of Chemical Formula 2.

The multifunctional compound is represented by formula X—C(R)RF—Y, in which X and Y are each independently —C(O)—O-M, —C(O)-HAL, —C(O)—NR.sup.1.sub.2, —C≡N, —C(O)NR.sup.1—SO.sub.2—R.sub.f.sup.1-W, or a fluorinated alkenyl group that is optionally interrupted by one or more —O— groups. HAL is —F, —Cl, or —Br. R.sub.f.sup.1 is a fluorinated alkylene group that is optionally interrupted by one or more —O— groups. W is —F, —SO.sub.2Z, —CF═CF.sub.2, —O—CF═CF.sub.2, or —O—CF.sub.2—CF═CF.sub.2. Z is —F, —Cl, —NR.sup.1.sub.2, or —OM. Each R.sup.1 is a hydrogen atom or alkyl having up to four carbon atoms. M is an alkyl group, a trimethylsilyl group, a hydrogen atom, a metallic cation, or a quaternary ammonium cation. R is a bromine, chloride, fluorine or hydrogen atom; and RF is a fluorinated alkenyl group that is unsubstituted or substituted by at least one chlorine atom, aryl group, or a combination thereof or RF is a fluorinated alkyl group or arylalkylenyl group that is substituted by bromine or iodine and uninterrupted or interrupted by at least one —O— group. A process for making the compound is also disclosed. A fluoropolymer made from the compound and a method of making the fluoropolymer are also disclosed.

Provided is a carbonate-containing silane compound having a characteristic structure that at least two silicon atoms are linked by a carbon chain. The silane compound is chemically stable. When used as an additive to a nonaqueous electrolyte solution, the silane compound does not jeopardize the safety of lithium ion secondary batteries.