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Ruthenium -, chloride, 2.5 hydrate

Ruthenium(III) chloride hydrate Ruthenium chloride, hydrate (8,9) (14898-67-0)... [Pg.25]

In terms of economical synthetic approaches to indoles, the synthesis of this heterocycle from anilines and trialkylammonium chlorides was effected in an aqueous medium (H20-dioxane) at 180°C in the presence of a catalytic amount of ruthenium(III) chloride hydrate and triphenylphosphine together with tin(II)chloride <00TL1811>. Muchowski devised a novel synthetic route to indole-4-carboxaldehydes and 4-acetylindoles 86 via hydrolytic cleavage of W-alkyl-5-aminoisoquinolinium salts 85 to homophthaldehyde derivatives upon heating in a two phase alkyl acetate-water system containing an excess of a 2 1 sodium bisulfite-sodium sulfite mixture <00JHC1293>. [Pg.118]

In aqueous 5M HC1, solutions of ruthenium chloride catalyze the hydration of acetylene, giving acetaldehyde (equation 166).614 Propyne reacted to give acetone. The reaction is inhibited by high or low chloride concentrations. The mechanism proposed is given in Scheme 60. [Pg.298]

In a series of papers, Holah et al. studied the donor character of TPPO, TPPS, and TPPSe towards rhodium, ruthenium, and rhenium. Treatment of TPPO with rhodium(III) chloride hydrate in ethanol causes reduction to Rh(I) and gives the dimeric complex (XXVI) in which TPPO is j -bonded to the metal. [Pg.173]

Inc. and ruthenium(III) chloride hydrate (5-101 water) was purchased from Fluka. The more expensive periodic acid can replace sodium periodate ... [Pg.45]

TEA or trioctylamine, and vinyl acetate as the acyl donor, led to the corresponding chiral acetate in yields above 68% and enantioselectivities of 80-97% ee. In 2006, Wolfson et al. reported the DKR of 1-phenylethanol by hydrated ruthenium chloride in an aqueous medium using Novozym 435 as the lipase. ° This novel process, involving phenyl acetate as the acyl donor, led to the formation of the corresponding chiral acetate in 82% yield and 98% ee. Besides its low price and ideal environmental impact, performing the reaction in an... [Pg.199]

Recent attempts to apply cerium(III) chloride (hydrate) and lanthanum(III) acetate to the Lewis acid-catalyzed oxidation of phenols with hydrogen peroxide proved futile in fact, they provided the worst results of over 20 metal salts studied (Ito et al., 1983). Ruthenium trichloride was even better than boron triiluoride, presumably activating the peroxide molecule rather than serving as a one-electron oxidant. [Pg.352]

The course of the condensation of ethylene glycol with secondary amines (Me2NH, Et2NH, pyrrolidine or morpholine) depends on the catalyst used. Triphenylphosphine complexes of ruthenium, e.g. RuCl2(PPh3)3, give hydroxyalkylamines while hydrated ruthenium(III) chloride yields diamines (equation 24)62. [Pg.543]

Anhydrous ruthenium(lll) chloride, RuCL, is made by direct chlorination of the metal at 700°C. Two aliotropic forms result. The trihydrate is made by evaporating an HQ solution of rulheinuiu(III) hydroxide to dryness or reducing ruthenium(VIII) oxide in a HQ solution. The tnhydrate, RuCk 3R>0, is the usual commercial form. Aqueous solutions of the tri-hydrate are a straw color in dilute solution and red-brown in concentrated solution. Ruthenium(lll) chloride in solution apparently forms a variety of aquo- and hydroxy complexes. The analogous bromide. RuBr3, is made by the same solution techniques as the chloride, using HBr instead of HQ. [Pg.1453]

Reaction (166) is also catalyzed by acidic rhodium chloride solutions under similar conditions to those used for ruthenium. Aquachloro complexes were again implicated and the most active species was [RhCl5(H20)]3. The hydration step was thought to involve a four-centred transition state (134).616 Here also, inhibition at low and high chloride ion concentration occurred. [Pg.299]

Platinum in a finely divided form is obtained by the in situ reduction of hydrated platinum dioxide (Adams catalyst) finely divided platinum may also be used supported on an inert carrier such as decolourising carbon. Finely divided palladium prepared by reduction of the chloride is usually referred to as palladium black. More active catalysts are obtained however when the palladium is deposited on decolourising carbon, barium or calcium carbonate, or barium sulphate. Finely divided ruthenium and rhodium, usually supported on decolourising carbon or alumina, may with advantage be used in place of platinum or palladium for some hydrogenation reactions. [Pg.88]

Solutions of pentaammine(nitrogen)ruthenium(II) have been prepared from ruthenium (III) chloride and hydrazine hydrate.1,2 These solutions have been used to prepare pentaammine-haloruthenium(III) salts [Ru(NH3)6X]X2 (X = Cl, Br, I). [Ru(NH3)5C1]C12 has been converted to pure pentaammine-(nitrogen)ruthenium(II) salts—[Ru(NH3)5N2]X2 (X- = Cl-, Br-, I-, BF4-, PFg-)—via the reaction between azide ion and aquopentaammineruthenium(III).2 Hexaammineruthe-nium(III) salts—rRu(NH8)6]X3 (X = I-, BF4-)—have been prepared by the reaction between pentaamminechlororuthenium-(III) chloride and hydrazine monohydrochloride. [Pg.2]

Ruthenium(III) chloride (2.0 g., 9 mmoles) (free from nitrosyl impurities) is dissolved in water (10 ml.) in a 200-ml. beaker. Hydrazine hydrate (85%, 20 ml.) is added carefully to the well-stirred solution. The initial reaction is exothermic, and large quantities of gas are evolved. The solution is stirred for about 12 hours and filtered by gravity. Because of the vigorous evolution of gas and the highly exothermic nature of the initial reaction, it is not recommended that the scale of the reaction be increased. Chloro complexes such as (NH<)2[RuClt] or K2[RuC15H20] may be substituted for ruthenium (III) chloride. [Pg.3]

The common starting material for nearly all preparations of ruthenium is a hydrated chloride (RuCb) of approximate composition RuCls 3H2O, containing 36-42% Ru. Although the material from most sources is not very pure, for example, containing nitrosyls from prior contact with nitric acid, the presence of impurities in most cases is not a serious problem and the yields of conversion of RuCb 3H2O can be nearly quantitative based on metal content. [Pg.4140]

Copper(II) salts are familiar oxidants in organic chemistry [204, 205], but they have been little used by transition-metal chemists. They are commercially available with various counter-anions as anhydrous or hydrates (CuCh is also simply obtained by heating CUCI2 2H2O in thionyl chloride) [206]. They have been used in CH2CI2 and MeCN to cleave metal-carbon bonds in 18-electron iron (11) and ruthenium (II) complexes. The first step of this reaction is a single-electron oxidation [207]. [Pg.1411]

Ruthenium(VIII) oxide is generated in situ during the reaction using another oxidizing agent, usually sodium metaperiodate, but sodium hypochlorite has also been used. Ruthenium sources are usually ruthenium(III) chloride or ruthenium(IV) oxide, preferably as hydrates, but w-bis(bipyridyl)dichlororuthenium dihydrate... [Pg.1785]


See other pages where Ruthenium -, chloride, 2.5 hydrate is mentioned: [Pg.244]    [Pg.41]    [Pg.723]    [Pg.354]    [Pg.356]    [Pg.2]    [Pg.228]    [Pg.43]    [Pg.43]    [Pg.454]    [Pg.500]    [Pg.165]    [Pg.536]    [Pg.195]    [Pg.101]    [Pg.117]    [Pg.643]    [Pg.395]    [Pg.252]    [Pg.392]    [Pg.642]    [Pg.4139]    [Pg.728]   
See also in sourсe #XX -- [ Pg.24 , Pg.300 ]




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