Abstract: 3-alkoxy, thioalkyl and amino-4-amino-6-(substituted)picolinic acids having a halogen, alkyl or mono-, di-tri- and tetra-substituted aryl substituents in the 6-position, and their acid derivatives, are herbicides demonstrating a broad spectrum of weed control.

Abstract: An intermediate for an acenedichalcogenophene derivative is expressed by formula (1) or formula (2). In the formulae (1) and (2), Ar1 represents any one ring of a benzene ring, a naphthalene ring, or an anthracene ring having at least one of hydrogen thereof is substituted with a boronic acid group or a boronate ester group; Y represents an oxygen atom, a sulfur atom, or a selenium atom; and Z represents a substituent group. This intermediate for the acenedichalcogenophene derivative is capable of easily deprotecting the boronic acid group or the boronate ester group and allowing a substitution with a desired functional group, such that a desired synthesis of acenedichalcogenophene derivative, and further a desired synthesis of oligomers and polymers using this obtained acenedichalcogenophene derivative can be achieved.

Abstract: Provided is an organic electroluminescent device (organic EL device) with improved luminous efficiency, sufficiently ensured driving stability, and a simple construction. The organic electroluminescent device includes an anode, an organic layer, and a cathode laminated on a substrate, in which at least one organic layer selected from the group consisting of a light-emitting layer, a hole-transporting layer, an electron-transporting layer, an electron-blocking layer, and a hole-blocking layer contains a carborane compound that has at least one carborane ring with a silyl group on the carbon thereof.

Abstract: Disclosed herein are novel metal bis(malonato)borate monomers and polymers formed by polymerizing the monomers. The monomers and the polymers have conductive properties, making them particularly useful in applications requiring materials with conductive properties. When the metal is lithium, the polymers are particularly well suited for use in lithium ion batteries.

Abstract: A polymer containing an optionally substituted repeat unit of formula (I) wherein each R is the same or different and represents H or an electron withdrawing group, and each R1 is the same or different and represents a substituent.

Abstract: Composite polymerization initators are disclosed suitable to prepare polymer brush composites. The composite initators comprise groups of formula (1): -(L)n-CR2—B(RB1)2 ??(1) covalently anchored to the surface of a solid substrate. Disclosed are also a process for the preparation of the composite polymerization initiator as well as the polymerizaton process providing a polymer brush composite from said composite initiator.

Abstract: The synthesis, functionalization and characterization of borepin-based extended pi-electron molecules is disclosed. Bulky substituents shielded the vacant boron p-orbitals thus allowing synthetic manipulation and purification under ambient lab conditions. The presently disclosed borepin-containing compounds displayed reversible cathodic electrochemistry and can be viewed as n-type analogues to bent acene hydrocarbons.

Abstract: 3-alkoxy, thioalkyl and amino-4-amino-6-(substituted)picolinic acids having a halogen, alkyl or mono-, di- tri- and tetra-substituted aryl substituents in the 6-position, and their acid derivatives, are herbicides demonstrating a broad spectrum of weed control.

Abstract: Disclosed herein are the compounds shown below. Each R is an organic group, Cb is a carborane group, and —C6H4— is phenylene. The value of each m is a nonnegative integer, q is 0 or 1, with the proviso that if q is 0 then m is 0 or 1, p is a positive integer, r is a positive integer, and n is an integer greater than or equal to 10. Also disclosed are methods of making and crosslinking the compounds —{SiR2—([O]q—SiR2)m-[Cb-SiR2—([O]q—SiR2)m]p—C?C—C6H4—C?C}— —{SiR2—(O—SiR2)m—C?C—C6H4—C?C}n—; —{SiR2—([O]q—SiR2)m—[C?C—C6H4—SiR2—([O]q—SiR2)m]p-Cb-[SiR2—([O]q—SiR2)m-Cb]r}-.

Abstract: Disclosed herein are the compounds shown below. Each R is an organic group, Cb is a carborane group, and —C6H4— is phenylene. The value of each m is a nonnegative integer, q is 0 or 1, with the proviso that if q is 0 then m is 0 or 1, p is a positive integer, r is a positive integer, and n is an integer greater than or equal to 10. Also disclosed are methods of making and crosslinking the compounds.

Abstract: Disclosed herein are the compounds shown below. Each R is an organic group, Cb is a carborane group, and —C6H4— is phenylene. The value of each m is a nonnegative integer, q is 0 or 1, with the proviso that if q is 0 then m is 0 or 1, p is a positive integer, r is a positive integer, and n is an integer greater than or equal to 10. Also disclosed are methods of making and crosslinking the compounds.

Abstract: Interlayer insulating films 5,7 (insulating films) provided in a memory capacitor cell 8 are formed between a gate electrode 3 and a counter electrode 8C formed on a silicon wafer 1. The interlayer insulating films 5,7 comprise a borazine-based resin, having a specific dielectric constant of no greater than 2.6, a Young's modulus of 5 GPa or greater and a leak current of no greater than 1×10?8 A/cm2.

Abstract: Disclosed herein are the compounds shown below. Each R is an organic group, Cb is a carborane group, and —C6H4— is phenylene. The value of each m is a nonnegative integer, q is 0 or 1, with the proviso that if q is 0 then m is 0 or 1, p is a positive integer, r is a positive integer, and n is an integer greater than or equal to 10. Also disclosed are methods of making and crosslinking the compounds.

Abstract: Semiconductor material, compositions containing the semiconductor material, semiconductor devices containing the semiconductor material, and methods of making semiconductor devices containing the semiconductor material are described. More specifically, the semiconductor material is a small molecule semiconductor that is an anthracene-based compound (i.e., anthracene derivative) that is substituted with two silylethynyl groups as well as two electron donating groups.

Abstract: Aromatic heterocycles incorporating boron and nitrogen atoms, in particular, 1,2-azaborine compounds having the formula and their use as synthetic intermediates.

Abstract: Cyclic organosilicon compounds that may be employed as an electron donor for polymerization catalyst systems, polymerization catalyst systems employing the cyclic organosilicon compounds as an electron donor, methods of making the polymerization catalyst systems, and polymerization processes to produce polyolefin are disclosed. The organosilicon compounds, which are useful as electron donors in polymerization catalyst systems for the production of polyolefins, are represented by the formula: where Q1, Q2, Q3, and Q4 may be identical or different and are each hetero-atoms selected from the group consisting of N, O, S, Si, B, and P. R1, R2, R3, and R4 may be identical or different and are each hydrocarbon-based substituents to Q1, Q2, Q3, and Q4, respectively. The subscripts i, j, m, and n are independently 0 to 3 R5 and R6 may be identical or different and are each a bridging group with a backbone chain length between the two hetero-atoms Q1 and Q3, and Q2 and Q4, respectively, 1-8 atoms.

Abstract: B-tris(silylvinyl)borazine is pyrolysed as a borazine precursor for the production of a B/N/C/Si ceramic. A high-temperature ceramic is obtained by means of a further pyrolysis at higher temperatures after a pre-pyrolysis, which is of high purity and essentially free of pores. The ceramic furthermore contains essentially no oxygen and is particularly suitable as a coating material and for the production of heating elements.

Abstract: Method is provided for controlling the stereo chemistry of functionalities or X groups to exo or endo positions on a polyhedral oligomeric silsesquioxane (POSS) compound by adding certain reagents to said X groups to change one or more positions thereof to endo or exo. Also provided are the POSS species formed by the above inventive method. Method is also provided for inserting a ring substituent into a POSS compound. Also provided are the POSS species formed by such inventive method.

Abstract: Compounds of the formula (I) 1

Abstract: This invention is directed to a group of novel homologous eight membered ring compounds having a metal, such as copper, reversibly bound in the ring and containing carbon, nitrogen, silicon and/or other metals.

Abstract: Novel chemical compounds have an ionic structure and in combination with an organometallic transition metal compound form a catalyst system which is advantageously used for the polymerization of olefins.

Abstract: Ortho-substituted arylmetal compounds are prepared by deprotonation of aromatics which have a hydrogen atom in the ortho position relative to at least one halogen atom, one trifluoromethoxy group, one dialkylamino group, one nitrile group, one alkoxy group or one dialkylamido group. The arylmetal compounds can then be reacted with electrophilic reagents. Deprotonation of the aromatics is carried out using alkyl- or arylmetal compounds or metal hydrides in the presence of a catalytic amount of a secondary metal amide.

Abstract: The present invention is related to diimino compounds of formulae (I) R2—N═C(R1)(R3)nC(R1)═N—R2 and (II) (R1)2C═N—(CR24)m—N═C(R1)2 functionalized with at least one siloxy group. Said diimino compounds are useful for obtaining a solid catalyst component for polymerizing olefins wherein the diimino compound of formulae (I) or (II) is bonded to a porous inorganic support and to a transition metal selected from groups 8, 9 and 10 of the periodic table. This invention also relates to a process for preparing said diimino compounds of formulae (I) or (II), to a process for obtaining said solid catalyst component comprising the combination of the diimino compound and a porous inorganic support. Further, the invention also relates to the use of said solid catalyst in combination with a cocatalyst to polirnenrze olefins.

Abstract: Novel C/N-- and B/C/N polymers which can be obtained by reaction of (a) a carbodiimide having the formula R.sub.3 E--NCN--ER.sub.3, in which R includes a group selected from the group consisting of alkyl groups and aryl groups, and E comprises a component selected from the group consisting of Si, Ge, and Sn, and (b) a halogenotriazine. Methods for making and using said polymers.

Abstract: A precursor composition includes (1) at least one crosslinking compound resented by the formula: ##STR1## wherein: u and x are independently selected positive integers, v and w are independently selected integers greater than or equal to zero, R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 are independently selected from the group consisting of alkyl, aryl, alkylaryl, haloalkyl, haloaryl and mixtures thereof, A and E are independently selected from the group consisting of O, an aliphatic bridge, an aryl bridge and mixtures thereof; and R.sup.9 and R.sup.10 are unsubstituted or substituted vinyl or ethynyl groups, (2) at least one organosilicon compound containing at least two silicon hydride moieties per molecule, and (3) a hydrosilation catalyst. A cross-linked polymer is formed by reacting the crosslinking compound of formula I with the organosilicon compound via a hydrosilation reaction. A thermoset polymer is formed by thermally curing the crosslinked polymer.

Abstract: Carborane-silane/siloxane compounds having unsaturated organic end groups e represented by the formula: ##STR1## wherein: u and x are independently selected positive integers, v and w are independently selected integers greater than or equal to zero, R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 are independently selected from the group consisting of alkyl, aryl, alkylaryl, haloalkyl, haloaryl and mixtures thereof; A and E are independently selected from the group consisting of O, an aliphatic bridge, an aryl bridge and mixtures thereof; and R.sup.9 and R.sup.10 are unsubstituted or substituted vinyl or ethynyl groups.

Abstract: The present invention is a compound having the formula:R.sup.1 --Ac.sup.1 --Ar.sup.1 --M--Ar.sup.2 --Ac.sup.2 --R.sup.2where R.sup.1 and R.sup.2 are independently selected from the group consing of hydrogen, unsubstituted alkyl groups, substituted alkyl groups, unsubstituted aryl groups, and substituted aryl groups, where Ac.sup.1 and Ac.sup.2 are independently selected alkynyl groups having at least 1 carbon-carbon triple bond, where Ar.sup.1 and Ar.sup.2 are independently selected substituted or unsubstituted aromatic diradicals, and where M has the structure ##STR1## where m is a positive integer, wherein x, p, y, r, n, and z are independently selected integers, where z.noteq.0 when n.noteq.0, and where R.sup.3 through R.sup.14 are independently selected from the group consisting of hydrogen, unsubstituted alkyl groups, substituted alkyl groups, unsubstituted aryl groups, and substituted aryl groups.

Abstract: Neutral single-source molecular organic precursors containing tetradentate tripodal chelating ligands are provided that are useful for the preparation of films using chemical vapor deposition. These complexes can be generally represented by the formula ##STR1## wherein "M" is selected from the group consisting of a lanthanide, an actinide, a Group IIIA metal, a Group IIIA metalloid, a Group IVA metal, a Group IVA metalloid, a Group VA metal, a Group VA metalloid, a Group IIIB metal, a Group IVB metal, a Group VB metal, a Group VIB metal, a Group VIIB metal, and a Group VIIIB metal. The ligand "Z" can be present or absent, i.e., k=0-1, and is selected from the group consisting of hydrogen, halide, and a group bonded to "M" through N, O, P, S, As, Si, or C. In the tetradentate tripodal chelating ligand "E.sub.c " is N, P, or As, and m=0-1. When "E.sub.t " is N, P, or As, m=1, and when "E.sub.t " is O, S, or Se, m=0. Each "R.sup.1 " is independently selected from the group consisting of hydrogen, (C.sub.1 -C.

Abstract: Preceramic compositions which have particular utility in providing protective ceramic coatings on normally oxidizable materials, such as carbon/silicon carbide and other carbon-containing composites and other materials, are obtained by dispersing solid particles comprising aluminum nitride particles in an organic solvent solution of an organoborosilazane polymer obtainable by reacting about 0.25-20 parts by weight of a trialkoxy-, triaryloxy-, or tri(arylalkoxy)boroxine with one part by weight of a polysilazane in an organic solvent. Ceramic coatings derived from the dispersions may be overcoated with ceramics derived from other preceramic polysilazane compositions to provide even greater protection to the substrates.

Abstract: Preceramic compositions which have particular utility in providing protective ceramic coatings on carbon/carbon composites, graphite, carbon fibers, and other normally oxidizable materials are prepared by dispersing about 0.4-1 part by weight of a metal boride in an organic solvent solution containing one part by weight of an organoborosilazane polymer prepared by mixing about 0.25-20 parts by weight of a trialkoxy-, triaryloxy-, or tri(arylalkoxy)boroxine with a solution of one part by weight of a polysilazane in an organic solvent.

Abstract: Boron/nitrogen/silicon preceramic polymers are prepared by copolymerizing at least one trihaloborane with at least one disilazane and at least one B-trichloroborazine; the resulting polymers, advantageously in fibrous form, are then facilely crosslinked and pyrolyzed into boron nitride ceramic materials.

Abstract: Crosslinked random boron/nitrogen preceramic polymers are prepared by reacting (a) admixture of a trihalogenoborane A and a cyclic boron/nitrogen compound B containing recurring structural units of the following general formula (1): ##STR1## in which A is a halogen atom and R is a hydrogen atom, or a hydrocarbyl, organosilyl or hydrogenoorganosilyl radical, with (b) an amino compound C containing at least one --NH.sub.2 group; the resulting polymers are facilely pyrolyzed into boron nitride ceramic materials.

Abstract: The novel organoboron reagent of the present invention is useful in the preparation of unsubstituted propargylic alcohols. This compound reacts with aldehydes and ketones cleanly to afford propargylic alcohols in excellent yields. Unsubstituted propargylic alcohols are important synthetic intermediates in the synthesis of a number of natural products. In addition, the novel organoboron reagent of the present invention also demonstrates diastereomeric selectivity when reacted with enatiomerically pure aldehydes.

Abstract: Preceramic polymers which have particular utility in providing protective ceramic coatings on carbon/carbon composites, graphite, carbon fibers, and other normally oxidizable materials are prepared by reacting about 0.25-20 parts by weight of a trialkyl- or trialkoxyboroxine in which the alkyl or alkoxy groups contain 1-6 carbons with one part by weight of a poly-silazane to form an organoborosilazane polymer.

Abstract: Disclosed is a polyborosilazane having a B/Si atomic ratio of 0.01 to 3 and a number-average molecular weight of about 200 to about 500,000 which can be pyrolyzed to give ceramics. The polyborosilazane is produced by reacting a polysilazane having a number-average molecular weight of about 100 to about 50,000 with a boron compound.

Abstract: Borazine derivatives used as low-loss binders and precursors for making ceramic boron nitride structures. The derivative forms the same composition as the boron nitride starting material, thereby filling the voids with the same boron nitride material upon forming and hot pressing. The derivatives have a further advantage of being low in carbon thus resulting in less volatile byproduct that can result in bubble formation during pressing.

Abstract: The present invention relates to a process for the production of an organoborosilicon preceramic polymer of the structure: ##STR1## wherein R.sup.1 is selected from alkyl having from 1 to 10 carbon atoms or phenyl, and x is selected from 0, 1, 2 or 3;which is pyrolyzable to produce a refractory material comprising inorganic compounds of Si, C and B, which process comprises:contacting a silicon containing compound of the structure:(R.sup.1).sub.x --Si (CH.dbd.CH.sub.2).sub.4-x or (R.sup.1).sub.x Si(C.dbd.CH).sub.4-xwith a boron containing compound selected from H.sub.3 B:BH.sub.3, H.sub.3 B:NH.sub.3, BH.sub.3 :N(R.sup.2).sub.3 wherein R.sup.2 is selected from methyl, ethyl, propyl, butyl or phenyl in an inert atmosphere at a temperature of between about 90.degree. and 170.degree. C. for between about 0.1 and 20 hr and recovering the prepolymer. The prepolymer is pyrolyzed to produce a ceramic article useful in high temperature (e.g., aerospace) or extreme environmental applications.

Abstract: Preceramic polymers which have particular utility in providing protective ceramic coatings on carbon/carbon composites, graphite, carbon fibers, and other normally oxidizable materials are prepared by reacting about 0.25-20 parts by weight of a trialkoxy-, triaryloxy-, or tri(arylalkoxy)boroxine with one part by weight of a polysiloxazane in an organic solvent to form an organoborosiloxazane polymer.

Abstract: A preceramic substituted borazine polymer of the formula: ##STR1## wherein R is methyl, ethyl, propyl, or butyl, and x is a positive integer. Also disclosed are methods for making the polymer, methods for converting the polymer into coatings, shaped articles, articles including fibers and filaments formed from the polymer, blends of the foregoing polymer and preceramic triamino-N-tris (trialkylsilyl) borazines, and methods for thermally decomposing the foregoing polymers to form shaped articles of boron nitride.

Abstract: Trans-.beta.-lactams are prepared in a nearly quantitative yield by a condensation reaction of a new intermediate metal enolate and an appropriate imine. Certain new metal enolates are provided as intermediates.

Abstract: Preceramic compositions which have particular utility in providing protective ceramic coatings on carbon/carbon composites, graphite, carbon fibers, and other normally oxidizable materials are prepared by mixing about 0.25-20 parts by weight of a trialkoxy-, triaryloxy-, or tri(arylalkoxy)boroxine with one part by weight of a polycarbosilane in an organic solvent.

Abstract: Silyl containing cyclic borazines are prepared by reacting chloroborazine with disilazanes.

Abstract: Chiral borane reagents and their organosilicon derivatives are disclosed.

Abstract: B-triamino-N-tris(trialkylsilyl)borazines, their condensation products, and the transformation of these into preceramic polymers amenable to fiber drawing and ultimately boron nitride fiber formation.

Abstract: .alpha.-Aminoboronic acids and derivatives of formula ##STR1## are potent, reversible inhibitors of aminopeptidases.

Abstract: Chiral boron enolates are provided having the formulae: ##STR1## wherein R.sub.2 B is 9-borobicyclo[3.3.1]non-9-yl(BBN) or R is n-butyl, cyclopentyl, or another alkyl group.The boron enolates can be condensed with aldehydes to produce aldol stereospecific product which includes a .beta.-hydroxy-.alpha.-methyl carbonyl unit in the product structure.

Abstract: Hydraulic fluids containing novel compounds of the general formula ##STR1## wherein: (a) each R.sup.1 is a hydrocarbyl group, or a group of the formula: ##STR2## and each R.sup.1 may be the same as, or different from, any other group R.sup.1.(b) R.sup.2 is a group as defined for R.sup.1, or a group of the formula:--O(R.sup.5 O).sub.n Si(R.sup.1).sub.3 (iv)and each group R.sup.2 may be the same as, or different from, any other group R.sup.2.(c) each of R.sup.3 and R.sup.4 is independently a group of the formula: ##STR3## (d) R.sup.5 is an alkylene or an arylene group and each R.sup.5 may be the same as, or different from, any other group R.sup.5,(e) R.sup.6 is a hydrocarbyl group of hydrogens and each group R.sup.6 may be the same as, or different from, any other group R.sup.6,(f) n is zero or an integer and each n may be the same as, or different from, any other n.