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Platinum, and hydrogenation

In general, hydrogenolysis of vinylic compounds is favored by platinum and hydrogenation by ruthenium and rhodium 31,55,59,72,106). In the reduction of 4-methyl-1-cyclohexenyl ether, the order of decreasing hydrogenolysis to give methylcyclohexane was established as Pt Ir > Rh > Os Ru = Pd (52). [Pg.41]

Whereas reduction of dimethyl 1,2,7-trimethyl-l T/-azepine-3,6-dicarboxylate (5) with platinum and hydrogen in cyclohexane yields the hexahydroazepine 6, hydrogenation in methanol solution results in loss of methylamine and formation of dimethyl 2,3-dimethylbenzene-1,4-dicar-boxylate (52% mp 66-67 C).239... [Pg.179]

Dimethyl 2,7-dimethyI-4//-azepine-3,6-dicarboxylate (7) with platinum and hydrogen in cyclohexane solution at atmospheric pressure undergoes rapid partial reduction to the 4,5-dihydro-l//-azepine 8.29... [Pg.180]

Complete reduction to dimethyl 2,7-dimethylhexahydroazepine-3,6-diearboxylate (bp 92-94 C/0.05 Torr) is achieved on prolonged treatment with platinum and hydrogen in ethanol solution. [Pg.180]

The basicity of a number of reagents 1, 5 and related compounds in THF solutions was determined voltammetrically by Chevrot and coworkers . Using platinized platinum and hydrogen electrodes, they measured the cathodic-anodic current as a function of potential for overall electrode reactions (equations 43a and 43b)... [Pg.258]

Figure 3. The curve plots of the temperature dependence of order parameter constmcted by formula (42) for different values of energetic constant 5 (43), equal to 0,1 +0,15 0,2 0,25 0,3 (curves 1-5 for 5>0 and curves l -5 for 5<0). The dotted line corresponds to 5=0, i.e. for pure fullerite without platinum and hydrogen atoms. The temperature Tc of loss of fullerite stable state (somewhat below the ordering temperature) is marked with circle on the abscissas axis. Figure 3. The curve plots of the temperature dependence of order parameter constmcted by formula (42) for different values of energetic constant 5 (43), equal to 0,1 +0,15 0,2 0,25 0,3 (curves 1-5 for 5>0 and curves l -5 for 5<0). The dotted line corresponds to 5=0, i.e. for pure fullerite without platinum and hydrogen atoms. The temperature Tc of loss of fullerite stable state (somewhat below the ordering temperature) is marked with circle on the abscissas axis.
Cfi Aromatic Reactions Without Hydrogen. In the present study, tire aluminophosphate molecular sieves have been used alone and with added platinum and hydrogen to isomerize Cs aromatic feeds. In an initial screening study, a series of large to medium pore size molecular sieves were evaluated for catalytic activity for m-xylene rearrangements at 1000° F without added metal and hydrogen. [Pg.522]

Bucharaine (C19H25NO4 mp 151-152°) gave a mono-O-acetate, an N-methyl derivative, and a dibromide, and with platinum and hydrogen it furnished 4-hydroxy-2-quinolone and an oil, C10H22O2. On this basis bucharaine was assigned partial structure 279, which was also in accord with the IR and UV spectra the alkaloid was believed to contain a double bond and a secondary and a tertiary hydroxyl function (201). The alkaloid... [Pg.173]

C-22 as expected. This base was identical with material derived from tomatid-5-en-3j -oP on comparison by i.r., chromatography, and melting point, but the mixed melting point was depressed. The base was, however, epimerized at C-22 and reduced (platinum and hydrogen in methanol) to give a product identical with... [Pg.286]

Vizsolyi and Tener have reported a modified method of / -eliminative degradation in which the pentofuranuronate conjugates obtained by selective oxidation with platinum and hydrogen peroxide were converted into the propylamides. The degradation products were isolated by treatment of the pentofuranuronamides with dilute alkali-metal hydroxide at 100°. [Pg.274]

According to mixed potential theory, the hydrogen evolution exchange current density on the cathode is the sum of the hydrogen evolution on platinum and hydrogen evolution... [Pg.255]

The titration difference betw een the ferri- and ferro-peroxidase was determined in the following way. Ferriperoxidase was titrated another portion of the same solution was reduced with platinum and hydrogen after addition of one mole safranine per mole peroxidase as reduction mediator, since ferriperoxidase is not reduced by platinum and hydrogen alone. [Pg.292]


See other pages where Platinum, and hydrogenation is mentioned: [Pg.258]    [Pg.103]    [Pg.107]    [Pg.86]    [Pg.334]    [Pg.5]    [Pg.19]    [Pg.5]    [Pg.19]    [Pg.258]    [Pg.258]    [Pg.86]    [Pg.798]    [Pg.276]    [Pg.44]    [Pg.110]    [Pg.73]    [Pg.73]    [Pg.207]    [Pg.60]    [Pg.73]    [Pg.161]   
See also in sourсe #XX -- [ Pg.1054 ]




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Platinum hydrogenation

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