A new stable, catalytically active, tetradentate organophosphorus modified rhodium hydroformylation catalyst has been discovered that is capable of producing aldehyde products with a high linear/branched product ratio from linear olefins. The tetradentate organophosphorus modifier is a tetrasubstituted 2,2,2,5-tetramethyl-1,1:4-1-terphenyl, whereby, each methyl group has one hydrogen substituted by an R, R-diorganophosphine moiety. The R, R may comprise aromatic, alkyl, arylalkyl and alkylaryl groups. The precursor 2,2,2,5-tetramethyl-1,1:4,1-terphenyl hydrocarbon may be prepared from para-xylene and toluene derivatives.

The disclosure is directed to: (a) phosphacycle ligands; (b) catalyst compositions comprising phosphacycle ligands; and (c) methods of using such phosphacycle ligands and catalyst compositions in bond forming reactions.

Tridentate platinum, palladium, and gold complexes of Formulas A-I and A-II and tridentate iridium and rhodium compounds of Formulas B-I, B-II, and B-III suitable for delayed fluorescent and phosphorescent or phosphorescent emitters in display and lighting applications.

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The present invention relates to compounds of the formula (I), to the use of compounds of the formula (I) in electronic devices and electronic devices comprising one or more compounds of the formula (I). The invention furthermore relates to the preparation of the compounds of the formula (I) and to formulations comprising one or more compounds of the formula (I).

Novel dinuclear silver(I) pyrazolido complexes and methods of synthesizing them are provided. Advantageously, the novel silver(I) pyrazolido complexes have excellent antimicrobial activity and methods of using said complexes to treat bacterial, fungal, and viral infections are also provided.

An unsymmetric bisphosphite of the formula (1) ##STR00001##
a process for preparation thereof, a reaction thereof with metals to give mixtures containing complexes of the unsymmetric bisphosphite and the metal, and a use thereof as a catalytically active composition in hydroformylation reactions, where the hydroformylation-active composition contains, as well as the complex of metal and unsymmetric bisphosphite, unbound bisphosphite and at least one further component.

The present invention describes indenocarbazole derivatives having electron- and hole-transporting properties, in particular for use in the emission and/or charge-transport layer of electroluminescent devices or as matrix material. The invention furthermore relates to a process for the preparation of the compounds according to the invention and to electronic devices comprising same. ##STR00001##