Particulate compositions, especially particulate compositions which are designed to be processed or transferred, are provided. The particulate compositions contain parent particles and composite particles, the composite particles being composed of a binder and fine parent particles. The particulate compositions have a low proportion of free fine parent particles and provide advantages where processing or transferring of the particulate compositions is practiced.

A method for preparing a pyridine compound substituted with trifluoromethylthio, difluoromethylthio or trifluoromethyl in the meta position is provided, which includes S1. in a glove box filled with nitrogen, adding a catalyst, a solvent, pinacolborane, and pyridine to a reaction flask, stirring the mixture, and performing a reaction at 40-100 C. for 2-12 hours to obtain dihydropyridine; S2. adding a trifluoromethylthio reagent, a difluoromethylthio reagent, or a trifluoromethyl reagent to the reaction flask, stirring the mixture, and performing a reaction at room temperature to 80 C. for 2-12 hours to obtain trifluoromethylthio-, difluoromethylthio- or trifluoromethyl-substituted dihydropyridine; and S3. placing the reaction flask in the air or adding 2,3-dichloro-5,6-dicyanobenzoquinone, stirring same, and performing a reaction at room temperature for 4-12 hours, followed by distillation under reduced pressure to remove the solvent and column chromatography separation to obtain the meta-substituted pyridine compound.

The present invention relates to a chrome compound composed of non-coordinating anions and a trivalent chrome cation, a reactant of the chrome compound and a bidentate ligand, an ethylene oligomerization reaction catalyst system using the chrome compound and the reactant, and a method for preparing an ethylene oligomer using the catalyst system. Through the above conformation, the present invention can selectively produce 1-hexene and 1-octene with high activity while omitting the use of methylaluminoxane (MAO), and can provide an ethylene oligomerization process more suitable for mass production.

A method of making an organoaminosilane compound, comprising i) combining A) a compound comprising a primary or secondary amine, B) monosilane (SiH.sub.4), and C) a catalyst, where the catalyst comprises magnesium or boron, where A), B) and C) are combined under sufficient conditions to form the organoaminosilane compound and hydrogen. A method of making a silylamine, the method comprising: i) forming an organoaminosilane compound by i) combining A) a compound comprising a primary or secondary amine, B) monosilane (SiH.sub.4), and C) a catalyst, where the catalyst comprises magnesium or boron, and ii) combining ammonia and the organoaminosilane compound produced in i) under sufficient conditions to form a silylamine product and a byproduct, where the byproduct is a primary or secondary amine.

Provided are a fouling inhibitor and a method of oligomerizing an olefin using the same. More particularly, in the method of oligomerizing an olefin, it is possible to minimize a total amount of polymers produced during a reaction and basically inhibit fouling of the polymers produced during the reaction onto an inner wall of a reactor by injecting a predetermined fouling inhibitor.

Methods for producing cycloaddition products comprising: reacting a diene with a dienophile in the presence of one or more boron-based catalysts of Formula I or Formula II are provided. In particular, the methods can be used to prepare 4-methyl-3-cyclohexene-1-carboxylic acid and 3-methyl-3-cyclohexene-1-carboxylic acid, including bio-based versions thereof. The cycloaddition products can be advantageously used in the production of terephthalic acid and isophthalic acid, and ultimately, poly(ethylene terephthalate), and bio-based versions thereof. ##STR00001##
BOBL.sub.4Formula II

The present invention provides processes for preparing silanylamines, such as disilanylamines and polysilanylamines, and compositions comprising the silanylamines. In one embodiment, the present invention provides processes for preparing a silanylamine compound, the processes comprising reacting a starting compound of general formula RR.sup.1N(Si.sub.xH.sub.2x+1) with an amine compound of general formula R.sup.2R.sup.3NH to produce the silanylamine compound of general formula R.sup.2.sub.mR.sup.3.sub.nN(Si.sub.xH.sub.2+1).sub.3-m-n.

Precatalysts and catalytic processes for the functionalization of sp.sup.2-carbons using the precatalysts are described herein. The precatalysts comprise an intramolecular Frustrated Lewis Pair (FLP) that is generated in situ from the corresponding precatalyst fluoroborate salts. The precatalyst fluoroborate salts are deprotected in situ to generate catalysts including intramolecular FLPs for the dehydrogenative borylation of alkenes, arenes and heteroarenes. The catalytic process comprises contacting a precatalyst, a functionalization reagent; and a substrate comprising a sp.sup.2-H carbon, under conditions to provide a substrate comprising a functionalized sp.sup.2 carbon.

The present disclosure provides, inter alia, methods for preparing formaldehyde from carbon dioxide using bis(silyl)acetals, methods for incorporating carbon derived from carbon dioxide into a complex organic molecule derived from formaldehyde using bis(silyl)acetals, and methods for generating an isotopologue of a complex organic molecule derived from formaldehyde using bis(silyl)acetals.

A two-dimensional hydrogen boride-containing sheet of the present invention has a two-dimensional network that consists of (HB).sub.n (n4).