In a continuation of our studies on the cleavage reactions of 1, 3-diols3 the preparation of di- tertiary-1, 3-diols in which the hydroxyl groups are cis or trans to one another respect to a ring system was undertaken. Although diols of the type desired had previously been in only one case7-the isopulegol hydrates-were both cis and trans isomers known. The isopulegol hy-
