Abstract
The formation of 1, 4-cyclohexadiene by olefin metathesis reaction catalyzed by WCl6-cocatalyst systems was studied in detail. In the reaction of methyl linoleate, the order of the activity of cocatalysts was changed by varying cocatalyst/WCl6 ratio, and the activity of cocatalysts which is expressed by the highest yield of 1, 4-cyclohexadiene and 6-dodecene obtained by varying the ratio decreased in the order; SnBun4>SnMe4>AlEt3>SnEt4. In most reactions at 80°C for 3h the olefin/WCl6 and the SnBun4/WCl6 ratios in the optimum reaction conditions were about 30 and 68, respectively. The highest yields of 1, 4-cyclohexadiene in the reactions catalyzed by WCl6-SnBun4 system were 170 (methyl linoleate without solvents), 24% (methyl linoleate in chlorobenzene), 22% (sufflower oil without solvents), 44% (linseed oil without solvents) and 56% (linseed oil in chlorobenzene).
