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Activities hydrogen

Fig. 13. The effect of ultrasonic irradiation on the catalytic hydrogenation activity of Ni powder. Fig. 13. The effect of ultrasonic irradiation on the catalytic hydrogenation activity of Ni powder.
In very broad terms, hydrogenation activity in terms of hydrogen utilization increases as coal rank decreases. Thus, in the absence of any other information, one can expect WVGS 13423 to be the more reactive of the two Obviously, generalities about hydrogenation behavior should not be extended to other coals based solely on a limited data set. Nevertheless, important differences between the pitches derived from WVGS 13421 and WVGS 13423 are apparent. [Pg.218]

During the course of base-catalyzed exchange in O-deuterated alcohols, the vinylic hydrogen in the a position to the ketone is replaced by deuterium, in addition to the hydrogens activated by enolization. Thus, under these conditions the exchange of androst-l-en-3-one (16, R = H) gives a trideuterio derivative (18) instead of the expected 4,4-d2 analog (16, R = D). " (For other examples see compounds 13, 19, 21, 23, 26 and 27.) Incorporation of this deuterium is due to rapidly reversible alcohol addition (16 -+17) and elimination (17 18) which competes with the enolization step. " ... [Pg.152]

C.A. Cavalca, and G.L. Haller, Solid Electrolytes as Active Catalyst Supports Electrochemical Modification of Benzene Hydrogenation Activity on Pt/p"(Na)Al203, /. Catal. Ill, 389-395(1998). [Pg.13]

Aromatic hydrogenation is accounted for using earlier developed rate equations [23]. The lower hydrogenation activity of NiMo compared to Pt is accounted for by increasing the activation energy by 23 kJ mol". The inhibition by hetero atom containing components on the... [Pg.56]

Systematic assessment of alumina-supported cobalt-molybdenum nitride catalyst Relationship between nitriding conditions, innate properties and CO hydrogenation activity... [Pg.245]

The activity of all catalysts were evaluated for the CO hydrogenation reaction. The histogram shown in Fig. 8 reveals that the bimetallic Co-Mo nitride system has appreciable hydrogenation activity with exception of samples 2 and 4. This apparent anomaly was probably due to the relatively high heat of adsorption for these two catalysts, which offered strong CO chemisorption but with imfavourable product release. [Pg.248]

Figure 5. Na NMR spectra for starting NaX zeolite and hydrogen activated Te-NaX zeolite. Figure 5. Na NMR spectra for starting NaX zeolite and hydrogen activated Te-NaX zeolite.
The aim of the experiments with ethanenitrile (CH3CN) was to study hydrogenation activity more quantitatively than was possible with the autoclave reactor. Catalysts 1P30, OH5, OH20, OH30 and HT were selected for investigation. [Pg.264]

As an additional probe of metal activity, we monitored benzene hydrogenation activity. As seen in Figure 9, Pt-containing rare earth catalysts have lower hydrogenation activity than chlorided alumina catalysts this result reflects inhibition of metal activity on these supports relative to conventional transitional alumina supports. Whereas the acid strength can be adjusted close to that of chlorided and flourided aluminas, metal activity is somewhat inhibited on these catalysts relative to halided aluminas. This inhibition is not due to dispersion, and perhaps indicates a SMSI interaction between Pt and the dispersed Nd203 phase. [Pg.569]

The hydrogenation activity of the isolated hydrides 3 and 6 towards cyclooctene or 1-octene was much lower than the Wilkinson s complex, [RhCKPPhj) ], under the same conditions [2] furthermore, isomerisation of the terminal to internal alkenes competed with the hydrogenation reaction. The reduced activity may be related to the high stability of the Rh(III) hydrides, while displacement of a coordinated NHC by alkene may lead to decomposition and Rh metal formation. [Pg.24]

In addition to Au and noble metals, Ni-Zn nanoclusters with an amorphous structure were successfully deposited on Ti02 nanoclusters. The state of Ni was metallic. The catalytic activity of Ni-Zn/Ti02 in olefin hydrogenation was ca. 10 times higher than unsupported Ni nanoclusters. Selective deposition onto Ti02 and the addition of Zn seemed to play an important role to stabilize Ni nanoclusters and to decrease the size of Ni nanoclusters, respectively. Also, clearly Zn promoted the hydrogenation activity of Ni and inhibit the growth of the size, but did not substantially affect Ni nature itself... [Pg.399]

Figure 57.9. The effect of wt.% Al on the catalysts nitrobenzene hydrogenation activity after being leached with 20 wt.% NaOH at 75°C (A) and 110°C (B). Figure 57.9. The effect of wt.% Al on the catalysts nitrobenzene hydrogenation activity after being leached with 20 wt.% NaOH at 75°C (A) and 110°C (B).
In addition to the use of hydrogen directly, hydrogen generated from CO and water (water-gas shift reaction) is also very effective in hydrogenating activated alkenes under basic conditions (Eq. 10.3).5... [Pg.313]

The mechanism of alkene hydrogenation catalyzed by the neutral rhodium complex RhCl(PPh3)3 (Wilkinson s catalyst) has been characterized in detail by Halpern [36-38]. The hydrogen oxidative addition step involves initial dissociation of PPI13, which enhances the rate of hydrogen activation by a factor... [Pg.89]


See other pages where Activities hydrogen is mentioned: [Pg.44]    [Pg.48]    [Pg.69]    [Pg.435]    [Pg.80]    [Pg.1255]    [Pg.610]    [Pg.128]    [Pg.93]    [Pg.328]    [Pg.15]    [Pg.82]    [Pg.246]    [Pg.360]    [Pg.249]    [Pg.98]    [Pg.119]    [Pg.121]    [Pg.570]    [Pg.28]    [Pg.174]    [Pg.398]    [Pg.399]    [Pg.113]    [Pg.9]    [Pg.100]    [Pg.189]    [Pg.510]    [Pg.531]    [Pg.275]    [Pg.91]    [Pg.91]    [Pg.109]   
See also in sourсe #XX -- [ Pg.400 ]

See also in sourсe #XX -- [ Pg.577 ]

See also in sourсe #XX -- [ Pg.463 ]




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A-Hydrogen, activation

Acetylene Active hydrogen

Activated alkenes, hydrogenation

Activated and hydrogen peroxide

Activated hydrogens in saturated carbonyl compounds

Activated hydrogens in unsaturated carbonyl compounds

Activated imine asymmetric hydrogenation

Activated imine direct asymmetric hydrogenation

Activated pyridines asymmetric hydrogenation

Activating Unactivated Carbon-Hydrogen Bonds

Activation energy ethylene hydrogenation

Activation energy hydrogen abstraction

Activation energy hydrogen termination

Activation energy of hydrogenation

Activation entropy hydrogenation

Activation hydrogen diffusion

Activation of Hydrogen Peroxide Using Inorganic and Organic Species

Activation of carbon-hydrogen bonds

Activation of hydrogen

Activation of hydrogen peroxide

Activation of molecular hydrogen

Activation of molecular hydrogen by homogenous

Activation of the Hydrogen Molecule

Activations hydrogen bond

Active Hydrogen-Reactive Chemical Reactions

Active Hydrogen-Reactive p-Aminobenzoyl Biocytin, Diazotized

Active Sites for HDS and Hydrogenation

Active carbon, hydrogen peroxide

Active carbon, hydrogen peroxide determination

Active hydrogen

Active hydrogen

Active hydrogen Mannich reaction

Active hydrogen activation

Active hydrogen compounds

Active hydrogen compounds acidity

Active hydrogen compounds acylation

Active hydrogen compounds alkylation

Active hydrogen compounds amination

Active hydrogen compounds aromatic nucleophilic substitution

Active hydrogen compounds arylation

Active hydrogen compounds base catalyst condensation

Active hydrogen compounds base-catalyzed

Active hydrogen compounds condensations

Active hydrogen compounds conversion

Active hydrogen compounds dimerization

Active hydrogen compounds formation

Active hydrogen compounds halogenation

Active hydrogen compounds ketones

Active hydrogen compounds nitration

Active hydrogen compounds nitrosation

Active hydrogen compounds reaction

Active hydrogen compounds reaction with aryl halides

Active hydrogen compounds with aldehydes

Active hydrogen compounds with arenes

Active hydrogen diazonium reaction

Active hydrogen reaction with nitrenes

Active hydrogen reactions

Active hydrogen with diazonium

Active hydrogen, definition

Active metal displacing hydrogen from water

Active oxygen hydrogen peroxide

Active sites hydrogenation

Active-Hydrogen-Mediated Hapten-Carrier Conjugation

Activity for hydrogenation of ethylene

Activity in hydrogenation

Activity of hydrogen ions

Activity, hydrogenation

Activity, hydrogenation

Acyl halides with active hydrogen

Acyl hydrogen bond activation

Addition of active hydrogen

Adsorption of hydrogen on activated carbons and carbon nanostructures

Alcohols active hydrogen determination

Aldehydes with active hydrogen

Alder carbon-hydrogen activation

Alkyl sulfates with active hydrogen

Alkyl sulfonates with active hydrogen

Amines active hydrogen determination

Amines from active hydrogen compounds

Anhydrides with active hydrogen

Arene derivatives carbon-hydrogen activation

Arenes with active hydrogen

Aromatics hydrogenation, active sites

Aryl halides with active hydrogen

Asymmetric Hydrogenation of Activated Imines

Asymmetric transfer hydrogenation activity

Biological Activation of Hydrogen

Biological systems, hydrogen activation

Brpnsted Acid Catalysis Hydrogen-Bonding Activation

C-Hydrogen, activation

C-Hydrogen, active

Carbon-hydrogen activation

Carbon-hydrogen activation hydrocarbons

Carbon-hydrogen bond activation

Carbon-hydrogen bond activation by

Carbon-hydrogen bond activation by Rh

Carbon-hydrogen bond activation energetics

Carbon-hydrogen bond activation flash photolysis

Carbon-hydrogen bond activation remote

Carbon-hydrogen bond activation theory

Carbon-hydrogen bond activation, aryls

Carbon-hydrogen bond cleavage, activation barrier

Catalyst, hydrogenation cooperative active sites

Catalysts activity in hydrogenation

Catalysts, hydrogenation active site

Catalysts, hydrogenation factors influencing activity

Catalytic Activity of Cp Iridium Complexes in Hydrogen Transfer Reactions

Catalytic activation of hydrogen

Catalytic activity of hydrogen

Catalytic hydrogenation activation energy

Cellulose hydrogen activation energy

Cinchona catalysts hydrogen-bonding activation

Cobalt, hydrogenation activation energy

Condensation with active hydrogen

Diastereoselective synthesis carbon-hydrogen bond activation

Enantioselective Conjugate Addition Reactions via Hydrogen-bonding Activation

Enantioselective hydrogenation of activated

Enolate anions from active hydrogen compounds

Epoxides with active hydrogen

Ethene, hydrogenation activation energy

From active hydrogen compounds

Functionalization carbon-hydrogen bond activation

Further Reactions of Active Hydrogen Compounds

Group VIII metals hydrogenation activities

Heterocycles from active hydrogen compounds

Heterogeneous Activation and Application of Hydrogen Peroxide

Heterolytic hydrogen activation

Homolytic hydrogen activation

Hydrides, Hydrogen Bonding and Dihydrogen Activation

Hydrocyanations hydrogen bonding activation

Hydroformylation reaction Hydrogen, homogeneous activation

Hydrogen PEFCs active

Hydrogen activated

Hydrogen activated

Hydrogen activating carbon monoxide

Hydrogen activating cobalt

Hydrogen activating copper

Hydrogen activating iridium

Hydrogen activating magnesium

Hydrogen activating molybdenum

Hydrogen activating nickel

Hydrogen activating niobium

Hydrogen activating palladium

Hydrogen activating rhenium

Hydrogen activating rhodium

Hydrogen activating ruthenium

Hydrogen activating tantalum

Hydrogen activating titanium

Hydrogen activating tungsten

Hydrogen activation

Hydrogen activation

Hydrogen activation Allochromatium vinosum

Hydrogen activation Clostridium pasteurianum

Hydrogen activation Desulfovibrio gigas

Hydrogen activation NiFe]-hydrogenase

Hydrogen activation Subject

Hydrogen activation competition between

Hydrogen activation electron paramagnetic resonance

Hydrogen activation energy

Hydrogen activation free-radical mechanism

Hydrogen activation heterolytic splitting

Hydrogen activation hydride oxidation

Hydrogen activation temperature dependence

Hydrogen activation, benzoin

Hydrogen activation, with immobilized

Hydrogen activation, with immobilized hydrogenase

Hydrogen activities, glass electrode

Hydrogen activities, lead oxides

Hydrogen activity series

Hydrogen adsorption activation energy

Hydrogen atom transfer activation energy

Hydrogen atoms, activated, substitution

Hydrogen autocatalytic activation

Hydrogen bonded amide activity

Hydrogen bonding nitroalkene acceptors activated

Hydrogen bonds proton path active site

Hydrogen chemically active, reasons

Hydrogen compounds, active reduction

Hydrogen cyanide activation barrier

Hydrogen diffusion activation energy

Hydrogen donors tools for the determination of POase activity in enzyme immunoassays

Hydrogen electrocatalytic activity

Hydrogen intramolecular heterolytic activation

Hydrogen ions active pumping

Hydrogen molecule activation

Hydrogen oxidation reaction kinetic activity

Hydrogen peroxide activation

Hydrogen peroxide antibacterial activity

Hydrogen peroxide decomposition active intermediates

Hydrogen peroxide scavenging activity

Hydrogen peroxide surface activation

Hydrogen phosphine-borane activation

Hydrogen reducing activity

Hydrogen spillover activated process

Hydrogen spillover catalytic activity

Hydrogen storage activated carbons

Hydrogen thioether activation

Hydrogen, activation potential

Hydrogen, catalytic activation

Hydrogen-bonding activation

Hydrogen-bonding activation Brpnsted acids

Hydrogen-bonding activation Diels-Alder reactions, dienes

Hydrogen-bonding activation Friedel-Crafts alkylations

Hydrogen-bonding activation aldehydes

Hydrogen-bonding activation carbonyl compounds, asymmetric

Hydrogen-bonding activation cascade reactions

Hydrogen-bonding activation cascades

Hydrogen-bonding activation compounds

Hydrogen-bonding activation enones

Hydrogen-bonding activation hydrogenation

Hydrogen-bonding activation nitroalkenes

Hydrogen-bonding activation nucleophiles

Hydrogen-bonding activation reactions

Hydrogen-bonding activation stabilized carbon

Hydrogen-bonding activation stereochemistry

Hydrogen-ion activities

Hydrogen-ion activity (pH) (cf. also Chapter

Hydrogen-ion activity in solution

Hydrogen-transfer reactions activation

Hydrogen-transfer reactions iminium activation

Hydrogenation active centers

Hydrogenation activities, hydrous titanium

Hydrogenation activity with

Hydrogenation dehydrogenation activity

Hydrogenation electrocatalytic activity

Hydrogenation mechanisms molecular hydrogen, activation

Hydrogenation of Aminoketones and Other Biologically Active Derivatives

Hydrogenation, activated

Hydrogenation, activated

Hydrogenation, catalyst activity

Iminium activation hydrogen-transfer

In Situ Activation of Cathodes for Hydrogen Evolution by Electrodeposition

Ir-Catalyzed Heterocyclization by C-H Bond Activation through Transfer Hydrogenation

Iridium complexes carbon-hydrogen activation reactions

Iridium hydrogenation activation energy

Ketimine/activated hydrogen

Ketone hydrogenation optically active alcohols

Kinetics hydrogen activation energy

Mechanism hydrogen activation

Metal clusters hydrogen activation

Metals with active hydrogen

Metals, activated hydrogen-metal exchange

Metals, activated hydrogenation

Methane, active hydrogen determination

Modes of hydrogen activation

Molecular hydrogen, activation

Molecular hydrogen, activation routes

Nitro compounds with active hydrogen

Noble metal catalysts hydrogen activation

Olefin hydrogenation hydrogen activation

Organosilicon compounds active hydrogen

Ortho esters with active hydrogen

Osmium hydrogenation activation energy

Oxidation reactions carbon-hydrogen activation

Oxidative rearrangements carbon-hydrogen bond activation

Oxygen carbon-hydrogen activation reactions

Palladium hydrogenation activation energy

Peroxisome proliferator-activated hydrogenation

Polyoxometalates hydrogen peroxide, activation

Preparation of polymethylphenylsiloxanes with active hydrogen atoms and vinyl groups at the silicon atom

Pressure dependence hydrogen activation

Quaternary ammonium with active hydrogen

Reaction with active hydrogen

Rhodium complexes carbon-hydrogen activation reactions

Silver oxide with active hydrogen

Some Recent Developments in Hydrogenation Activation of Hydrides by Transition Metal Derivatives

Sulfido complexes hydrogen activation

Sulfoxide complexes activation of hydrogen

THE ACTIVATION OF HYDROGEN

Thermochemical studies hydrogen activation

Thioethers with active hydrogen

Transfer hydrogenation active catalyst

Transfer hydrogenation active catalyst species

Transition metal catalysts carbon-hydrogen activation

Transition metal complexes hydrogen activation

U.S. hydrogen activities

Unsaturated aldehydes with active hydrogen

Unsaturated carboxylic esters with active hydrogen

Unsaturated ketones with active hydrogen

Working with Other Active Hydrogen Atoms

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