Ruthenium disulfide

Figure 5.50 Molecular structures of the disulfide-linked ruthenium polypyridyl methylviologen diads, [RuC VC6S]2, and ruthenium disulfide complexes, [RuCmS]2 (of variable chain lengths n and m, respectively), plus the structure of the electron acceptor 4ZV, reported by Yamada and co-workers [81]...

Among the sulfides of molybdenum, cobalt, nickel, iron, rhodium, rhenium, osmium, and ruthenium, only the polysulfide of cobalt153 and the sulfide of ruthenium showed good selectivities. Optimum conditions over cobalt polysulfide included temperatures of 85-120°C, hydrogen pressures of 2.8-6.9 MPa, substrate concentrations of up to 25%, and substrate catalyst ratios of 50-80 1 (g of feed/g of Co). A typical run is shown in eq. 9.64. The hydrogenation over ruthenium disulfide was successful... 

RuS2 RUTHENIUM DISULFIDE 1401 SbOCI ANTIMONY CHLORIDE OXIDE 1446... 

Ruthenium and osmium form only disulfides. These have the pyrite structure and are diamagnetic semiconductors this implies that they contain M . RuSc2, RuTc2, OsSc2 and OsTc2 are very similar. All 6 dichalcogenides are obtained directly from the elements. 

Krinhe, H.M. and Tributsch, H., Oxygen and chlorine evolution on ruthenium iron disulfide mediated by low energy photons, Ber. Bunsen. Phys. Chem., 88,10,1984. 

Itoh and co-workers reported the ruthenium(n)-catalyzed [2 + 2 + 2]-cycloaddition of 1,6-diynes with isocyanates to afford the corresponding bicyclic pyridones 163 (Scheme 72).356 357 For previously reported ruthenium-catalyzed [2 + 2 + 2]-cycloaddition of 1,6-diynes see Refs 358 and 358a, and for theoretical calculations of the cyclocotrimer-ization of alkynes with isocyanates, isothiocyanates, and carbon disulfide see Refs 359 and 359a. 

For a related example of a ruthenium(II)-catalyzed cycloaddition of 1,6-diynes with isothiocyanates and carbon disulfide, see Yamamoto, Y. Takagishi, H. Itoh, K. J. Am. Chem. Soc. 2002, 124, 28-29. 

Addition of disulfides to carbon-carbon double bonds is catalyzed by ruthenium complexes (Equation (71)).204 Even relatively less reactive dialkyl disulfides add to norbornene with high stereoselectivity in the presence of a catalytic amount of Cp RuCl(cod). Diphenyl disulfide adds to ethylene and terminal alkenes under identical conditions (Equation (72)). 

Germanium(II) sulfide, 4419 Gold(III) sulfide, 0116 Iron disulfide, 4401 Iron(II) sulfide, 4400 Iron(III) sulfide, 4404 Manganese(II) sulfide, 4706 Manganese(IV) sulfide, 4707 Mercuiy(II) sulfide, 4607 Molybdemun(IV) sulfide, 4719 Potassium sulfide, 4670 Rhenium(VII) sulfide, 4891 Ruthenium(IV) sulfide, 4895 Samarium sulfide, 4899 Silver sulfide, 0026 Sodium disulfide, 4812 Sodium polysulfide, 4813 Sodium sulfide, 4811 Strontium sulfide, 4901 Tantalum(TV) sulfide, 4903... 

Photoelectrochemical assemblies consisting of gold nanoparticles and a tris (2,2 -bipyridine)ruthenium(II)-viologen -disulfide derivative ([RuVS]2) were obtained at gold electrodes by virtue of combination of the salting-out effect and self-assembly process [172]. 

Phenyl ethylenesulfonate, 241 Tin(IV) chloride, 300 Containing one sulfur 2,4-Bis(4-me thoxyphenyl)-1,3-dithia-2,4-diphosphetane-2,4-disulfide, 38 Titanium(IV) chloride-Zinc, 310 Other five-membered heterocycles Carbon dioxide, 65 Methanesulfonyl chloride, 176 Six-membered rings Containing one nitrogen—piperidines Dichlorotris(triphenylphosphine)-ruthenium(II), 107 Mercury(II) trifluoroacetate, 175 Tetrakis(triphenylphosphine)-palladium(O), 289... 

Iron disulfide, 4395 Iron(II) sulfide, 4394 Iron(III) sulfide, 4398 Manganese(II) sulfide, 4701 Manganese(IV) sulfide, 4702 Mercury(II) sulfide, 4602 Molybdenum(IV) sulfide, 4714 Potassium sulfide, 4665 Rhenium(VII) sulfide, 4885 Ruthenium(IV) sulfide, 4889 Samarium sulfide, 4893 Silver sulfide, 0035 Sodium disulfide, 4806 Sodium polysulfide, 4807 Sodium sulfide, 4805 Strontium sulfide, 4895... 

An aged carbonylated ruthenium chloride solution reacts with tetrabenzyl-dithiaramyl disulfide to produce a dithiocarbamate cation (170). 

A theoretical study of the mechanism of ruthenium-catalyzed formation of pyran-2-one and the corresponding sulfur and selenium analogues 8 from acetylene and CX2 (X = O, S, Se) has been reported (Equation 3) <2004NJC153>. This cyclotrimerization reaction has been experimentally carried out using carbon disulfide as a substrate <2002JA28>. The proposed mechanism involves formation of a bicyclic metal carbene intermediate. Formation of this intermediate seems to be particularly unfavorable energetically in the case of carbon diselenide. 

Figure 5.30 Molecular structure of the disulfide-linked ruthenium polypyridyl methyl viologen dyad, [RuC7VC6S]2 [65]...

Figure 5.51 Applied potential dependence on the photocurrent intensities of RUC7VCeS / Au (O), RuCsVCgS/Au ( ), RuC17S/Au ( ) and RuC13S/Au ( ) electrodes Xex, 470 nm [TEOA] = 5 x 10-2 M [NaC104] = 0.1 M. Reprinted from Thin Solid Films, 350, Y. Koide,N. Terasaki,T. Akiyama and S. Yamada, Effects of spacer-chain length on the photoelectrochemical responses of mono-layer assemblies with ruthenium tris(2,2 -bipyridine)-viologen linked disulfides, 223-227, Copyright (1999), with permission from Elsevier Science...

The ruthenium complex Cp RuCl(COD) catalyzed the [2+2+2] cycloaddition of 1,6-diynes with heterocumulenes such as isocyanates, isothiocyanates, or carbon disulfide [99,100]. Bicyclic pyridones [99] and bicyclic thiopyrans [100] were thus obtained (Eq. 76). 

Oxathiin 2,2-dioxides (sultones) (e.g., 150) are obtained by the addition of sulfur trioxide to dienes or by ringclosing metathesis (RCM) of sulfonates using the second-generation Grubbs ruthenium catalyst (Scheme 75) . The same catalyst was also successfully employed in the RCM of diallyl disulfide 151 which led quantitatively to 3,6-dihydro-l,2-dithiin 152 (Scheme 76) <20020L1767>. 

Thiols are known to be excellent Ugands for the stabiUzation of gold and platinum nanoparticles. In this respect, we did not observe any fluxional behavior [31,52] in solution NMR experiments for thiols coordinated to the surface of noble metal particles (Fig. 8). However, in the case of ruthenium, we foimd the slow catalytic formation of alkyl disulfides [31]. After exclud-... 

One of the most important links between alkylidyne and alkyne compounds is that one of the first synthetic routes for cobalt al-kylidynes involved alkynes as reagents (264-268). In later studies, several other synthetic routes to cobalt (269-280), rhodium (281, 282), iron (283-285), molybdenum (286, 287), ruthenium (288-292), osmium (293, 294), nickel (295, 296), and some mixed-metal (165, 297-302) clusters have been developed. Reagents employed include carbynes (166, 277, 280), alkali metals (269), carbon disulfide (275), dithioesters (276, 282), RCC13, and acids (281, 282). 

The results in Table XII show that self-activated platinum oxide exchanges in both a and /3 positions of thiophene, whereas self-activated ruthenium oxide catalyzes deuteration almost exclusively in the a. position. A similar type of selectivity has been observed for the exchange of thiophene on the disulfides of tungsten (both a and /3 deuteration) and molybdenum (predominantly a) using evaporated metal films.116... 

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