Ru carbonyl cluster

In summary, the selective surface-mediated syntheses of various Ru carbonyl clusters from RuCl3-nH20 or [Ru(CO)3Cl2]2 involves the formation of [Ru3(CO)i2] and is controlled by the basicity of the surface, the composition of the gaseous phase and the temperature [11]. 

Finally, it is worth noting that the water-soluble Ru carbonyl cluster [Ru3(CO)6L 3] where L = Ph2P (3-S03Na)CgH4 has been prepared and shown to be an active hydrogenation and hydroformylation catalyst. ... 

The Ru-carbonyl clusters react with e.g. bling H, through Ru,(CO), in n-octane at reflux for... 

Derivatives that contain the hard donor oxygen atom as part of a bridging ligand are rare in Ru carbonyl cluster chemistry. Data from structures that have been determined in the 1995-2005 period are given in Table 8. 

It is proposed that the rate dependence on concentration and pressure involves cluster dissociation and that the monomeric species, Ru(CO), is responsible for the high activity of this system. Dissociation is well known for ruthenium carbonyl clusters (25,27-31). Piacenti and co-workers (31) have demonstrated that at temperatures above 80° and CO pressures greater than 150 psi, monomeric ruthenium carbonyl is observed in significant quantities due to the equilibrium,... 

Carbonyls. Related to the chalcogenide and metal cluster studies are the carbonyl studies for ORR.189 I92-198-201 The majority of the carbonyl work has been reported by several Mexican research groups. This body of work appears to have developed from studies on ruthenium-containing chalcogenide catalysts in the mid-1990 s. The precursors used for these catalysts involved Ru-carbonyls.202... 

Ru, RuCo, and Co carbonyl cluster-derived catalysts, 38 362-363 structural model, 38 366-367 synthesis gas conversion, 38 364-365 ZSM-5-supported Pd catalysts, 39 207-208... 

Heteronuclear Pt-Ru binary carbonyl clusters have been used for the preparation of tailored PtRu bimetallic electrocatalysts. The use of carbonyl complexes such as Ru4Pt2(CO)i8 and closely related carbide and hydride carbonyl-derived clusters, that is, Ru5PtC(CO)i6 and Ru6Pt3(CO)2i( X3-H)( x-H)3, has allowed the preparation of carbon- and y-Al203-supported catalysts in which the presence of RugPts, RusPt and Ru4Pt2 clusters or nanoparticles has been reported [62-65]. 

Different mixed carbonyl cluster precursors of Ru and Pt having phenyl-containing tin Hgands have recently been proposed for the preparation of Ru PtySnz nanoparticles on mesoporous sihca support These systems show high performance for the production of cyclododecene and 1,4-cyclohexanedimethanol by selective hydrogenation reactions [117]. 

Table 16.1 Synthesis of some Re, Fe and Ru carbonyl complexes and clusters on the surface of Si02, MgO or...

Interest in the high nuclearity carbonyl clusters of ruthenium has centered around the hexanuclear carbido-cluster Ru6C(CO)17 and its derivatives, Ru5C(CO)15 and, more recently, [Ru C CO) ]2-.1 The chemistry of both Ru6C(CO)17 and Ru5C(CO)15 has been investigated in some detail. Their syntheses are described below. 

Metal carbonyl cluster compounds which contain three ruthenium or three osmium atoms in the cluster core are common.1 Potentially useful reagents for syntheses of these compounds are the triruthenium and triosmium dianions [M3(CO)h]2 (M = Ru, Os).2 Therefore, it is desirable to develop good synthetic routes to obtain [M3(CO)11]2- (M = Ru, Os) of high purity in high yields. A method that is particularly useful for generating [M3(CO)n]2 (M = Ru, Os) is the designed stoichiometric reduction of M3(CO)12 (M = Ru, Os) using an electron carrier such as potassium-benzophenone.3... 

---