The invention relates to a method for producing aqueous preparations of complexes of platinum group metals (PGM) Pt, Pd, Rh and Ir having the general formula [M.sup.A/M.sup.B/M.sup.C (L).sub.a (H.sub.2O).sub.b (O.sup.2−).sub.c(OH.sup.−).sub.d](OH—).sub.e(H.sup.+).sub.f, wherein M.sup.A=Pt.sup.II or Pd.sup.II, M.sup.B=Pt.sup.IV, M.sup.C=Rh or Ir, L is a neutral monodentate or bidentate donor ligand, and a is an integer between 1 and 4 (or 2) and/or between 1 and 6 (or 3), b is an integer between 0 and 3 (or 5), c is an integer between 0 and 3 (or 4), d is an integer between 0 and 3 (or 5), e is an integer between 0 and 2 (or 3 or 4) and f is an integer between 0 and 4 (or 5). In the method according to the invention, the hydroxo complexes H.sub.2P.sub.d(OH).sub.4 (in the case of M.sup.A=Pd.sup.II), H.sub.2Pt(OH).sub.6 (in the case of M.sup.A=Pt.sup.II and M.sup.B=Pt.sup.IV) or H.sub.3M.sup.C(OH).sub.6 (for M.sup.C=Rh.sup.III Ir.sup.III) are converted in the presence of the donor ligands, wherein at least one hydroxo group of the hydro complex is exchanged. Preferably, the reaction occurs at temperatures in the range of 40 to 110° C. with a reaction time of between 2 and 24 hours, wherein, where MA=PtII, the conversion additionally occurs in the presence of a reduction agent. The method optionally further comprises an exchange of OH anions bound outside of the complex sphere with other anions (e.g. hydrogen carbonate or carbonate anions). The aqueous preparations contain PGM complexes such as [Pt(en).sub.2](OH).sub.2, [Pt(EA).sub.4](OH).sub.2 or [Rh(NH.sub.3).sub.6](OH).sub.3 and are used to produce electroplating baths, heterogeneous catalysts or metal powders, for example.

The invention relates to noble metal-oxo clusters represented by the formula [M.sub.s(R.sub.2XO.sub.2).sub.z(OR′).sub.xO.sub.yX′.sub.q] or solvates thereof, corresponding supported noble metal-oxo clusters, and processes for their preparation, as well as corresponding metal cluster units, optionally in the form of a dispersion in a liquid carrier medium or immobilized on a solid support, and processes for their preparation, as well as their use in conversion of organic substrate.

This disclosure relates to solid-supported bridged Pd(II)—N-heterocyclic carbene catalysts, methods of preparing the catalysts, and methods of using the catalysts in carbonylative Sonogashira coupling reactions.

The present specification relates to a composition for forming an optical film comprising a compound represented by Chemical Formula 1 and a binder resin, an optical film, and a display device comprising the same.

The present specification relates to a compound represented by Chemical Formula 1, a composition for forming an optical film and an optical film comprising the same, and a display device comprising the optical film.

The present application discloses a 3,3,3′,3′-tetramethyl-1,1′-spirobiindane-based phosphine ligand, an intermediate, a preparation method and uses thereof. The compound of phosphine ligand is a compound having a structure represented by formula I or formula II, or an enantiomer, a raceme, or diastereomer thereof. The phosphine ligand can be prepared via a preparation scheme in which the cheap and easily available 6,6′-dihydroxyl-3,3,3′,3′-tetramethyl-1,1′-spirobiindane is used as a raw material and the compound represented by formula III serves as the key intermediate. The new phosphine ligand developed by the present application can be used in catalytic organic reaction, in particular as a chiral phosphine ligand that is widely used in many asymmetric catalytic reactions including asymmetric hydrogenation and asymmetric allyl alkylation, and thus it has economic practicability and industrial application prospect. ##STR00001##

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 compound of formula (I) wherein M is Pd(II) or Ni(II); X is a halide; R.sub.1 and R.sub.2 are independently organic groups having 1-20 carbon atoms, or R.sub.1 and R.sub.2 are linked to form a ring structure with the phosphorus atom; R.sub.3 is an organic group having 1-20 carbon atoms; provided that R.sub.1, R.sub.2, R.sub.3 are not each phenyl.

##STR00001##

Compounds are described and characterized that bind guanine quadruplexes of DNA or RNA. Binding data and inhibition of growth data of five cancer cell lines are presented.

Disclosed are a pincer-type ligand having a structurally rigid acridane structure and a metal complex consisting of the pincer-type ligand and a metal bound to each other, and exhibiting high reactivity and stability during a variety of bonding activation reactions. T-shaped complexes can be prepared from .sup.acriPNP(4,5-bis(diisopropylphosphino)-2,7,9,9-tetramethyl-9H-acridin-10-ide), which is a pincer-type PNP ligand having an acridane structure, and metal complexes, which can be structurally rigid and thus exhibit excellent reactivity and stability based on minimized structural change thereof, can be prepared by introducing an acridane structure into the backbone thereof. The PNP ligand is structurally stable and has novel chemical properties, as compared to conventional similar ligands, and thus can be utilized in a wide range of catalytic reactions and material chemistry.