Effect of temperature on the reduction

The effect of temperature on the reduction of nitro-alkanes has been extensively exploited in the synthesis of cp-ephedrine analogues [i5,21,22] starting from 1-aryl-2-nitropropenes which are easily converted to the substrates 2. Reduction of these nitrocompounds below 20° C affords the hydroxylamine. The amine is formed above 55° C. Neutralisation of either reaction mixture causes rapid intramolecular migration of the acetyl group from oxygen to nitrogen, a reaction which implies a... 

Fig. 8. Effect of temperature on the reduction ir area of Nb-25 %Zr superconductor wires.

Study on effect of temperature on the reduction dynamics in catalyst bed shows that the influence of the temperature on the thermodynamic and kinetic parameters of the reduction process must be considered. When wiistite is reduced, the characteristic of equilibrium of H2 is the change in reverse direction, and the rate constant increases. With temperature increasing, the reduction ability of H2 increases, and total amount of oxygen captured from oxides will be determined by temperature. 

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