Mixture of bisphosphites having an open and a closed outer unit and the use thereof as a catalyst mixture in hydroformylation.

Diphosphites having an open and a closed 2,4-methylated outer unit and use thereof in hydroformylation.

In one aspect, phosphine compounds comprising three adamantyl moieties (PAd.sub.3) and associated synthetic routes are described herein. Each adamantyl moiety may be the same or different. For example, each adamantyl moiety (Ad) attached to the phosphorus atom can be independently selected from the group consisting of adamantane, diamantane, triamantane and derivatives thereof. Transition metal complexes comprising PAd.sub.3 ligands are also provided for catalytic synthesis including catalytic cross-coupling reactions.

A light-emitting device including an organometallic compound represented by Formula 1, an electronic apparatus including the light-emitting device, and the organometallic compound are provided

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Provided is a metal complex as represented by formula I. The metal complex may be used as a catalyst for asymmetric catalytic hydrogenation, is capable of efficiently catalyzing and synthesizing a series of chiral p-aryl amides having high optical purity, and is especially capable of asymmetrically catalyzing and hydrogenating a tetra-substituted enamide compound, chiral amides having high optical purity are synthesized, and the carrying amount of ligand may reach 100,000.

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Diphosphites having an open, 3-methylated outer unit and use thereof in hydroformylation.

New diphosphites based on cis-butene-1,4-diol.

There is provided a novel optically active bisphosphinomethane useful as a ligand for an asymmetric catalyst, excellent in oxidation resistance in air, and easy in handling. There is also provided a transition metal complex using the optically active bisphosphinoraethane having excellent asymmetric catalytic ability as a ligand. The optically active bisphosphinomethane is represented by the general formula (1), and the transition metal complex has the optically active bisphosphinomethane as a ligand. ##STR00001##
(In the formula, R.sup.1 represents an adamantyl group; R.sup.2 represents a branched alkyl group having 3 or more carbon atoms; and * represents an asymmetric center on a phosphorus atom.)

6,6′-([1,1′-Biphenyl]-2,3′,-diylbis)oxy))didibenzo[d,f][1,3,2]dioxaphosphepines and the use thereof in hydroformylation.

New diphosphites based on cis-butene-1,4-diol.