Disclosed herein are processes for dehydrogenation of an alkane to an alkene using an iridium pincer complex. In the dehydrogenation reactions, hydrogen that is co-formed during the process must be removed for the chemical reaction to proceed and to prevent the excess hydrogen from poisoning the catalyst. In one embodiment the process comprises providing an alkane feedstock comprising at least one alkane and contacting the alkane with an iridium pincer complex in the presence of a hydrogen acceptor selected from the group consisting of ethylene, propene, or mixtures to form an alkene product. The processes disclosed herein can accomplish facile, low-temperature transfer dehydrogenation of alkanes with unprecedented selectivities and TONs at a reasonable rate of conversion.

The present invention relates to specific transition metal catalysts and their use in chemical reactions.

The present disclosure provides a method that embodies a simple and effective route to remove homogeneous catalysts from solutions wherein NMR/MRI signal amplification by reversible exchange (SABRE) or parahydrogen-induced polarization (PHIP) is performed. A method for recovering a homogeneous SABRE/PHIP catalyst for reuse is also described.

Catalysts for the hydrogenolysis of butane are described. A supported catalyst for hydrogenolysis of butane to ethane can include a support and a catalytic crystalline bimetallic composition that can include a molybdenum-iridium (Mo—Ir) crystalline composition attached to the support. The supported catalyst has a BET specific surface area of at least 100 m.sup.2/g, preferably 100 m.sup.2/g to 500 m.sup.2/g. Method of use and methods of making the catalyst are also described.

Use of transition metal complexes of the formula (I) in organic light-emitting diodes ##STR00001## where: M.sup.1 is a metal atom; carbene is a carbene ligand; L is a monoanionic or dianionic ligand; K is an uncharged monodentate or bidentate ligand selected from the group consisting of phosphines; CO; pyridines; nitriles and conjugated dienes which form a π complex with M.sup.1; n is the number of carbene ligands and is at least 1; m is the number of ligands L, where m can be 0 or ≥1; o is the number of ligands K, where o can be 0 or ≥1; where the sum n+m+o is dependent on the oxidation state and coordination number of the metal atom and on the denticity of the ligands carbene, L and K and also on the charge on the ligands carbene and L, with the proviso that n is at least 1, and also
an OLED comprising these transition metal complexes, a light-emitting layer comprising these transition metal complexes, OLEDs comprising this light-emitting layer, devices comprising an OLED according to the present invention, and specific transition metal complexes comprising atb least two carbene ligands.

A hydroformylation catalyst having excellent catalytic activity and stability, a composition including the hydroformylation catalyst, and a method of preparing an aldehyde using the hydroformylation catalyst, wherein, when hydroformylation of an olefin compound is performed in the presence of the hydroformylation catalyst to prepare an aldehyde, the normal/iso (n/i) ratio of the prepared aldehyde is lowered, and synthesis gas yield is increased.

The present invention is drawn to artificial metalloenzymes for use in cyclopropanation reactions, amination and C—H insertion.

A halosilane compound: R.sup.1CH.sub.2CH.sub.2SiR.sup.5.sub.2X is prepared by hydrosilylation reaction of a vinyl compound: R.sup.1CH═CH.sub.2 with a halogenodiorganosilane compound having formula: HSiR.sup.5.sub.2X in the co-presence of an iridium catalyst, an internal olefin compound, and an allyl halide. The halosilane compound is prepared on an industrial scale with the advantages of low costs, high yields, and high selectivity, using a small amount of iridium catalyst.

An object of the present invention is to provide a novel method for producing a fluorine-containing methylene compound. The above object can be achieved by a method for producing a compound represented by formula (1): ##STR00001##
wherein R.sup.1 represents an organic group, R.sup.A represents hydrogen or fluorine, R.sup.4a represents hydrogen or an organic group, R.sup.4b represents hydrogen or an organic group, R.sup.5a represents hydrogen or an organic group, R.sup.5b represents hydrogen or an organic group, and
R.sup.2 represents hydrogen or an organic group; R.sup.2 is optionally connected to R.sup.4a to form a ring; the method comprising step A of reacting a compound represented by formula (2): ##STR00002##
wherein X.sup.1 represents a leaving group, and other symbols are as defined above, with a compound represented by formula (3): ##STR00003##
wherein X.sup.2 represents a leaving group, and other symbols are as defined above, in the presence of a reducing agent as desired, under light irradiation.

Provided is a method of generating hydrogen efficiently using a renewable resource as a raw material.

A method of producing hydrogen according to the present disclosure is a method in which hydrogen is generated from a saccharide in the presence of a solvent and the following catalyst: catalyst which contains at least one metal element selected from the metal elements in Groups 8, 9, and 10.

The catalyst is preferably a complex or salt of the metal element, and particularly preferably a complex including the at least one metal element selected from the metal elements in Groups 8, 9, and 10 and at least one ligand selected from pentamethylcyclopentadienyl, cyclopentadienyl, p-cymene, and 1,5-cyclooctadiene.

As the solvent, it is preferable to use at least one selected from an organic acid and an ionic liquid.

The saccharide may be a lignin-saccharide complex, and is preferably cellulose.