Abstract
Catalytic hydrogenation was carried out with the two kinds of acetylenic diol which are both same in the arrangements on carbon atoms and in the position of hydroxyl groups, with the different position of triple bond. One of the hydroxyl groups attaches to secondary carbon atom and the other attaches to tertiary carbon atom. When the hydroxyl group attached to secondary carbon atom in the propargyl position, the hydroxyl group was easier to eliminate, and almost all the amounts of the used sample was hydrogenolized. When the hydroxyl group attached to tertiary carbon atom in the propargyl position, the rate of elimination of the hydroxyl group which attached to secondary carbon atom was somewhat greater than the other, and the hydrogenolysis was incomplete.
