The present invention is a method for producing a fluorohydrocarbon represented by a structural formula (3) comprising bringing a secondary or tertiary ether compound represented by a structural formula (1) into contact with an acid fluoride represented by a structural formula (2) in a hydrocarbon-based solvent in the presence of a boron trifluoride complex. (In structural formulae (1) to (3), each of R.sup.1 and R.sup.2 represents an alkyl group having 1 to 3 carbon atoms, R.sup.3 represents a hydrogen atom, a methyl group, or an ethyl group, and each of R.sup.4 and R.sup.5 represents a methyl group or an ethyl group, provided that R.sup.1 and R.sup.2 are optionally bonded to each other to form a ring structure.) ##STR00001##

The present invention is a method for producing a fluorohydrocarbon represented by a structural formula (3) comprising bringing a secondary or tertiary ether compound represented by a structural formula (1) into contact with an acid fluoride represented by a structural formula (2) in a hydrocarbon-based solvent in the presence of a boron trifluoride complex. (In structural formulae (1) to (3), each of R.sup.1 and R.sup.2 represents an alkyl group having 1 to 3 carbon atoms, R.sup.3 represents a hydrogen atom, a methyl group, or an ethyl group, and each of R.sup.4 and R.sup.5 represents a methyl group or an ethyl group, provided that R.sup.1 and R.sup.2 are optionally bonded to each other to form a ring structure.)

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The present invention relates to a process for the functionalization of a rubber polymer comprising reacting the rubber polymer with at least one source of nitrene or carbene, in the presence of a catalyst of formula Tp.sup.xAg, wherein Tp.sup.x represents a hydrotris(pyrazolyl)borate ligand. This process leads to selective rubber functionalization without secondary reactions such as chain scission or cross linking and produces functionalized rubbers with improved compatibilization properties. The invention also refers to the polymer produced therefrom and to uses of said polymer.

The present invention relates to an organic borate-based catalyst including a compound represented by the following Formula 1 and a hydroxyl group-containing compound, a method for preparing an isobutene oligomer using the same and an isobutene oligomer prepared thereby: ##STR00001## wherein R.sub.0, R.sub.1 to R.sub.4, o, p, q and r are described therein.

This disclosure relates to a novel ligand compound that can oligomerize ethylene with high catalyst activity and selectivity, a catalyst system for olefin oligomerization including the same, and a method for olefin oligomerization using the same.

The present invention, among other things, provides highly syndiotactic poly(dicyclopentadiene) and/or hydrogenated poly(dicyclopentadiene), compositions thereof, and compounds and methods for preparing the same. In some embodiments, a provided compound is a compound of formula I, II or III. In some embodiments, a provided method comprises providing a compound of formula I, II or III.

A process of metathesizing a feedstock in the presence of a metathesis catalyst and at least one catalyst enhancer. The catalyst enhancer can be selected from a sacrificial catalyst or a non-catalyst enhancer. The process exhibits improved reaction times and/or the metathesis catalyst can be used at very low concentrations.

A composition contains a mixture of silyl hydride, an alpha-beta unsaturated ester, a Lewis acid catalyst and an amine having the following formula: R.sup.1R.sup.2R.sup.3N; where the nitrogen is not a member of an NCN linkage and where each of R.sup.1, R.sup.2, and R.sup.3 is independently selected from a group consisting of hydrogen, alkyl, substituted alkyl, and conjugated moieties; and wherein at least one of R.sup.1, R.sup.2 and R.sup.3 is a conjugated moiety connected to the nitrogen by a conjugated carbon.

In some embodiments, the present disclosure pertains to a compound, comprising a transition metal complex having the formula -[M (x,y)-L.sub.1 (w,v)-L.sub.2 (t,u)-L.sub.3].sup.p+An.sup..sub.mZ.sup..sub.p-m. In an embodiment of the present disclosure may be . In another embodiment may be . In some embodiments of the present disclosure, M is a transition metal. In a related embodiment, p is an integer corresponding to the oxidation state of M. In some embodiments of the present disclosure, each of x, y, w, v, t, and u independently comprise R. In other embodiments, each of x, y, w, v, t, and u independently comprise S. In an embodiment of the present disclosure, each of L.sub.1, L.sub.2, and L.sub.3 independently is a ligand comprising a substituted diamine. In some embodiments, An.sup. comprises a lipophilic anion, where m is from 1 to 3, and where Z.sup. comprises an optional second anion.

The present invention relates to a method for preparing a cocatalyst compound using an anhydrous hydrocarbon solvent, and a cocatalyst compound prepared thereby.