The invention relates to compounds in accordance with the general formula [Ru(arene)(R.sup.a—N═CR.sup.1—CR.sup.3═N—R.sup.b)] or [Ru(arene)((R.sup.c,R.sup.d)N—N═CR.sup.H1—CR.sup.H3═N—N(R.sup.e,R.sup.f))]. In this case, arene is selected from the group consisting of mononuclear and polynuclear arenes and heteroarenes. R.sup.1, R.sup.3, RH.sup.1, R.sup.H3 and R.sup.a-R.sup.f are independently selected from the group consisting of H, an alkyl radical (C1-C10) and an aryl radical. It further relates to methods for the production of these compounds, compounds obtainable according to these methods, their use and a substrate having on a surface thereof a ruthenium layer or a layer containing ruthenium. In addition, the invention relates to a method for producing compounds [Ru(arene)X.sub.2]2, wherein arene is selected from the group consisting of mononuclear and polynuclear arenes and X=halogen, compounds of this type obtainable according to this method, and their use. The aforementioned ruthenium(O) compounds can be produced in a simple, cost-effective and reproducible manner with a high degree of purity and good yield. Due to their high degree of purity, they are suitable for use as ruthenium(O) precursors.

The disclosure relates to dicarbonyl complexes of ruthenium and osmium with bi- and tridentate nitrogen and phosphine ligands. The disclosure relates to methods for preparing these complexes and the use of these complexes, isolated or prepared in situ, as catalysts for reduction reactions of ketones and aldehydes both via transfer hydrogenation or hydrogenation with hydrogen.

A light-driven fuel cell includes a cathode, an anode, and a proton-permeable membrane between the anode and the cathode. The anode includes a photocatalyst for anaerobic methane oxidation reaction, and when the anode is supplied with methane and water and is irradiated with light, methanol, protons and electrons are generated by anaerobic methane oxidation reaction from the methane and the water supplied to the anode; the protons pass through the proton-permeable membrane and move to the cathode; and the electrons move to the cathode via an external circuit. The cathode includes a photocatalyst for aerobic methane oxidation reaction, and when the cathode is supplied with methane and oxygen and is irradiated with light, methanol and water are generated by aerobic methane oxidation reaction from the methane and the oxygen supplied to the cathode and the protons and the electrons moved from the anode.

The use of a metal complex containing a ruthenium ion or an osmium ion, and a tridentate aminodicarbene ligand, the tridentate aminodicarbene ligand having one secondary amino group and two specific heterocyclic carbene groups sandwiching the amino group, enables hydrogenation reduction of carbonyl compounds, such as ketones, carboxylic acid esters, lactones, carboxylic acid amides, and lactams, and imine compounds under relatively mild conditions to produce corresponding alcohols, amines, and the like in a high yield with high catalytic efficiency. The metal complex is obtained by a method comprising steps of reacting a specific metal compound with a specific aminodicarbene precursor and subsequently reacting a specific compound. Reduction of a carbonyl compound or an imine compound in the presence of this metal complex using a hydrogen donor makes it possible to reduce the carbonyl compound or imine compound by hydrogenation.

A dental appliance made of an olefin polymer is directly formed via rapid prototyping without the use of an intermediary physical mold. A polymer precursor solution includes one or more olefin-containing monomers and/or oligomers, an olefin polymerization catalyst, and a UV absorbing agent to limit penetration of the UV light through the polymer precursor solution. One or more reactions of the polymer precursor solution are modulated in response to UV light, and the polymer precursor solution may further include an inhibitor (quenching agent) configured to modulate those reactions. The polymer precursor solution can be deposited using UV-cured stereolithographic or 3D printing methods to form appliances exhibiting improved elongation at break characteristics and suitable stress resistance.

The present invention provides novel Ruthenium-based transition metal complex catalysts comprising specific ligands, their preparation and their use in hydrogenation processes. Such complex catalysts are inexpensive, thermally robust, and olefin selective.

This invention relates generally to olefin metathesis catalyst compounds, to the preparation of such compounds, compositions comprising such compounds, methods of using such compounds, articles of manufacture comprising such compounds, and the use of such compounds in the metathesis of olefins and olefin compounds. The invention has utility in the fields of catalysts, organic synthesis, polymer chemistry, and industrial and fine chemicals industry.

This invention describes the preparation and its application of a cyanide bridged metal organic compound with intramolecular magnetic transition. The general structural formula of the compound is [(L2)(L1)M1(NC)M2(L3).sub.m(CN)M1(L1)(L2)](PF.sub.6).sub.6, n=2, 3, or 4. Damagnetic cyanidometal-bridge polynuclear compound [(L2)(L1)M1(NC)M(L)m(CN)M1(L1)(L2)](PF.sub.6).sub.2 is synthesized by compound M(L1)(L2)X (X=Cl, Br or I) with redox activity is selected as the terminal group fragment, and M(L).sub.2(CN).sub.2 is selected as the central bridging ligand, using solution. Carry out electrochemical research on compound [(L2)(L1)M1(NC)M(L)m(CN)M1(L1)(L2)](PF.sub.6).sub.2, select the appropriate oxidant, and obtain the one-electron oxidation product [(L2)(L1)M1(NC) M(L).sub.m(CN)M1(L1)(L2)](PF.sub.6).sub.3 and two-electron oxidation product [(L2)(L1)M1(NC)M(L).sub.m(CN)M1(L1)(L2)](PF.sub.6).sub.4. The cyanide-bridged metal organic compound is a cyanide bridged polynuclear compound that bridges by two diamagnetic metal fragments through a cyano group on a paramagnetic ion. According to its electrochemical and magnetic properties, it can be used for molecular-based magnetic materials. The preparation method is simple and the process conditions are easy to control.

The invention provides a method for synthesizing musk macrocycles comprising contacting an easily accessible diene starting materials bearing a Z-olefin moiety and performing a ring closing metathesis reaction in the presence of a Group 8 olefin metathesis catalyst.

The present invention provides novel ruthenium or osmium based complex structures with a unique combination of ligands comprising a Schiff-base type ligand, a N-heterocyclic carbene ligand and a CO ligand which can be prepared according to two different routes involving easily accessible starting materials and which represent excellent catalysts for hydrogenating unsaturated compounds, oligomers and polymers, in particular at unforeseeably low temperatures. ##STR00001##