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Cobalt reaction

As a result of the temperatures involved, particularly in cobalt reactions, aldol condensations of the aldehydes can occur. The aldol product can dehydrate and then be hydrogenated [Eq. (22)] ... [Pg.14]

An aspect of the hydroformylation reaction which is of particular importance in continuous commercial operation is the separation of the catalyst from product aldehyde and/or alcohol, together with its recovery and recycle into the reactant stream. This feature is of considerable economic and process importance for cobalt reactions and of extreme economic importance for rhodium reactions. [Pg.46]

It was concluded that in this case an equilibrium existed which gave 100 ppm of soluble cobalt at reaction temperature. The polymer support acted as a reservoir for furnishing soluble metal at reaction temperature and reabsorbing it after completion (about 10 ppm in the product after cooling to ambient temperature). The rate approximated that obtained in a standard cobalt reaction with 100 ppm of cobalt catalyst. [Pg.48]

Even at 180°C, however, Reaction 2 proceeds very slowly and decomposition to metallic cobalt (Reaction 1) is significant. The use of a palladium catalyst to promote Reaction 2 has recently (5) been suggested, but it is economically less suitable. [Pg.30]

As mentioned in the previous section, the carbonylation of methanol to acetic acid is an important industrial process. Whereas the [Co2(CO)s]-catalyzed, iodide-promoted reaction developed by BASF requires pressures of the order of 50 MPa, the Monsanto rhodium-catalyzed synthesis, which is also iodide promoted and which was discovered by Roth and co-workers, can be operated even at normal pressure, though somewhat higher pressures are used in the production units.4,1-413 The rhodium-catalyzed process gives a methanol conversion to acetic acid of 99%, against 90% for the cobalt reaction. The mechanism of the Monsanto process has been studied by Forster.414 The anionic complex m-[RhI2(CO)2]- (95) initiates the catalytic cycle, which is shown in Scheme 26. [Pg.272]

The rhodium-catalyzed process gives a methanol conversion to acetic acid of 99%, against 90% for the cobalt reaction. The mechanism of the Monsanto process has been studied by Forster. The anionic complex c -[Rhl2(CO)2] (95) initiates the catalytic cycle, which is shown in Scheme 26. [Pg.272]

Two papers document the synthesis of heterobimetallic compounds of titanium and cobalt Reaction of [MeH(OBu ),] with (HCo(CO)J affords I(Bu 0),Ti-Co(CO)4] which contains an unsupported metal-metal bond ", while addition of [Coi(CO)J to [Cp 2Ti(C2Hi)J (Cp aCjUtSiMe,) gives the radical [Cp jTi0i-CjPh)2Co(CO)l in which a weak metal-metal... [Pg.163]

Ferric salts are converted by alkali fluorides into fairly insoluble colorless complex iron fluorides of the general formula Ms[FeFe]. The stability of these complexes is so great that in aqueous solution the Fe+ ion concentration is insufiicient to give the red fenic-thiocyanate product. Since the cobalt reaction is not hindered by the presence of fluorides, cobalt can then be detected in the presence of much iron. [Pg.201]

However, the bulky 2,2-diphenyl derivative, Co-R, forms (3,3-diphenyl-4-oxa-cyclopentyl)methylcobaloxime, Co-R, suggesting the formation of the radical, R-, which cyclizes to R before bonding to cobalt, reactions (109) and (110) ... [Pg.309]

Modifications to the standard Nicholas reaction generally fall into the following categories asymmetric reactions, use of heteroatom nucleophiles, use of metals other than cobalt, reactions of neutral electrophiles, reactions of carbocations not in the a-position, cycloadditions, and rearrangements. [Pg.286]


See other pages where Cobalt reaction is mentioned: [Pg.11]    [Pg.207]    [Pg.292]    [Pg.113]    [Pg.79]    [Pg.120]    [Pg.192]    [Pg.129]    [Pg.292]    [Pg.285]    [Pg.123]    [Pg.534]    [Pg.560]    [Pg.6]    [Pg.377]    [Pg.379]    [Pg.212]    [Pg.250]    [Pg.262]    [Pg.560]    [Pg.272]    [Pg.371]   
See also in sourсe #XX -- [ Pg.119 , Pg.120 ]

See also in sourсe #XX -- [ Pg.325 , Pg.326 ]

See also in sourсe #XX -- [ Pg.28 ]




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2-Vinylpyridine, reaction with cobalt

Acetylenes, addition reactions cobalt carbonyls

Alkyl halides cobalt-catalyzed Heck reactions

Alkyne reactions with cobalt carbonyl complexes

Bailar inversion reactions, cobalt

Bimolecular reaction cobalt

Chlorine evolution reaction cobalt oxide

Cobalt Nanoparticles under Reaction Conditions

Cobalt Pauson-Khand reaction

Cobalt acyl complexes reaction

Cobalt allergic reaction

Cobalt ammine complexes inner-sphere reactions

Cobalt anation reactions

Cobalt anionic sandwich complexes, reaction

Cobalt aquation reactions

Cobalt base hydrolysis reactions

Cobalt carbonyl carbonylation reactions

Cobalt carbonyl carboxylation reactions

Cobalt carbonyl general reactions

Cobalt carbonyl hydride reactions

Cobalt carbonyls reactions

Cobalt carbonyls, exchange reactions

Cobalt carbonyls, reaction with pyridines

Cobalt catalysis Diels-Alder reactions

Cobalt catalysis arylation reactions

Cobalt catalysts conjugation reactions

Cobalt catalysts reaction products

Cobalt chloride, cyclization reactions

Cobalt cleavage reaction

Cobalt clusters catalytic reactions involving

Cobalt clusters reaction with carbon monoxide

Cobalt complexes Reformatsky reactions

Cobalt complexes addition reactions

Cobalt complexes atom-transfer substitution reactions

Cobalt complexes carbon dioxide reactions

Cobalt complexes electron transfer reactions

Cobalt complexes inner-sphere reactions

Cobalt complexes octacarbonyl, reactions

Cobalt complexes outer-sphere reactions

Cobalt complexes outer-sphere redox reactions

Cobalt complexes radical reactions

Cobalt complexes reaction with oxygen

Cobalt complexes reactions

Cobalt complexes reactions with aromatic hydrocarbons

Cobalt complexes redox reactions

Cobalt complexes substitution reactions

Cobalt complexes water exchange reaction

Cobalt complexes, electron-transfer reactions carbonyl

Cobalt complexes, electron-transfer reactions dimerization

Cobalt complexes, electron-transfer reactions hydrides

Cobalt complexes, electron-transfer reactions manganese

Cobalt complexes, ligand substitution reactions

Cobalt compounds decarbonylation reactions

Cobalt compounds reaction with H2Os

Cobalt diimine complexes, reaction with

Cobalt diyne reactions

Cobalt enolates aldol reaction

Cobalt formation reaction

Cobalt group transfer reactions

Cobalt hydride complexes catalytic reactions

Cobalt hydride complexes, reaction with

Cobalt hydrocarbonyl catalyst reactions

Cobalt hydrocarbonyl, reactions

Cobalt hydrocarbonyl, reactions acylcobalt tetracarbonyls

Cobalt hydrocarbonyl, reactions epoxides

Cobalt hydrocarbonyl, reactions olefins

Cobalt in Pauson-Khand reaction

Cobalt inert complexes, reactions

Cobalt ions, reactions

Cobalt isomerization reactions

Cobalt ligand reactions

Cobalt ligand substitution reactions

Cobalt metal, reactions

Cobalt oxidation reactions

Cobalt reaction entropy

Cobalt reaction rate

Cobalt reaction with Lewis bases

Cobalt reaction with alkali metals

Cobalt reaction with benzyl bromide

Cobalt reaction with methanol

Cobalt reaction with phenyl halides

Cobalt redox reactions

Cobalt ring cleavage reactions

Cobalt silyl complexes cleavage reactions

Cobalt sorption reactions

Cobalt substitution reactions

Cobalt, allylfragmentation radical reactions

Cobalt, nitrosyl complexes, reaction with

Cobalt, nitrosyl complexes, reaction with oxygen

Cobalt, octacarbonylbiscatalyst silane reaction with carbonyl compounds

Cobalt, tris conformation reactions

Cobalt-, manganese-, and iron-catalyzed cross-coupling reactions

Cobalt-Catalysed Mizoroki-Heck-Type Reactions

Cobalt-Catalyzed Homo-benzannulation Reaction

Cobalt-boron bonds reactions with

Cobalt-catalysed reactions

Cobalt-catalysed reactions carbonylation

Cobalt-catalysed reactions cycloaddition

Cobalt-catalyzed Alder-ene reaction

Cobalt-catalyzed Cyclization Reactions

Cobalt-catalyzed carbonylations competing reactions

Cobalt-catalyzed cross-coupling reaction

Cobalt-catalyzed reactions

Cobalt-catalyzed reactions chloride

Cobalt-initiated radical reactions

Cobalt-mediated Pauson-Khand reaction

Cobalt-mediated reactions

Cobalt—germanium bonds reactions with

Cobalt—silicon bonds reactions with

Coupling reactions Grignard reagents/cobalt salts

Coupling reactions cobalt

Dimethyl zinc, reaction with cobalt

Dimethyl zinc, reaction with cobalt complexes

Diynes, reactions with metal complexes cobalt

Equilibrium Reactions of Copper and Cobalt Complexes

Heck reaction cobalt

Hydrogen/deuterium reaction with cobalt

Iron-, Copper-, Nickel-, and Cobalt-Catalyzed Carbonylative Domino Reactions

Methyl transfer reactions cobalt-containing enzymes

Nitrogen, reaction with cobalt

Nucleophilic reactions cobalt carbonyl complexes

Optimization of the Cobalt-Catalyzed Hydroazidation Reaction

Propargyl-cobalt coupling reactions

Reaction conditions cobalt catalysis

Reaction of Cobalt with Diiodomethane

Reaction of Dry Cobalt Powders with CO

Reaction rates cobalt catalysis

Reactions Involving Rhodium and Cobalt

Reactions Involving Rhodium, Iron, and Cobalt

Reactions in which carbon-cobalt bonds are cleaved

Reactions in which carbon-cobalt bonds are formed

Reactions of Cobalt Carbonyls

Reactions of Cobalt(m)

Reactions of cobalt-bound organic ligands

Secondary reaction cobalt catalysis

Self exchange reactions cobalt

Styrenes, cobalt-catalyzed Heck reactions

Substitution Reactions of Inert-Metal Complexes— oordination Numbers 6 and Above Cobalt Hay Aquation

Synthesis Using Multiple Cobalt Reactions

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