The influence of the temperature, nature, and concentration of catalyst components on the conversion of 1-decene during its isomerization by the action of a Ni(OCOC17H35)(2)-(C2H5)(n)AlCl3-n (n = 1.0, 1.5) catalyst system was studied. It was shown that the 1-decene conversion increased from 19 to 100 wt % within 60 min as the nickel stearate concentration was increased from 0.00016 to 0.002 mol/l. The conditions of the process that ensure attaining 100% conversion within 5 min were revealed. Under these conditions, a temperature change from 20 to 80degreesC had no substantial effect on the 1-decene isomerization process. An increase in the ethylaluminum sesquichloride concentration from 0.01 to 0.04 mol/l led to a fourfold growth in the 1-decene isomerization rate. It was found that ethylaluminum dichloride is a more effective cocatalyst than ethylaluminum sesquichloride. IR, H-1 NMR, and C-13 NMR measurements showed that 1-decene isomerizes in the presence of these catalytic systems into a mixture of all theoretically possible positional and geometrical isomers. Based on the results obtained, the nature of the active sites and the mechanism of 1-decene isomerization are discussed.