| Autor: |
Lafer, L. I., Dykh, Zh. L., Yakerson, V. I., Rubinshtein, A. M. |
| Zdroj: |
Russian Chemical Bulletin; May 1982, Vol. 31 Issue: 5 p865-872, 8p |
| Abstrakt: |
1.The process of formation of nickel-complex catalysts from nickel carbonyl Ni(CO)4 and an allyl halide, C3H5X, on the surface of mineral oxide supports (Al203, Si02 and MgO) was investigated. The strong effect of the support on complexing was demonstrated a bis-p-allyl nickel halide is formed on Al203, together with other complexes on Si02, but not on MgO.2.The bis-p-allyl nickel complex is stabilized on the surface of the Al203 by reaction with coordination-unsaturated aluminum ions and surface OH groups. Ni(CO)4 and C3H5X react on the surface of SiO2 with formation of several types of complexes: monomeric and dimeric forms of p-allyl nickel halide and a complex of nickel and vinyl acetyl halide.3.Dehydrohalogenation of C3H3X with formation of allene and a hydrocarbon halide takes place on the surface of MgO in the reaction of Ni(OH)4 and C3H5X: The hydrocarbon halide reacts with the basic surface of the MgO with liberation of water; under the effect of the Ni(CO)4 and the MgO, the C3H5X yields diallyl, which forms a p-complex with nickel. |
| Databáze: |
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