The reaction of aqueous ammonia with a mixture of acetone and carbon disulfide was investigated by Heilpern, who isolated the principal product (his so-called “pinacolylthiourea”) as crystals which melted with decomposition at 240-243 O. As possible structures for the presumed new compound, to which he erroneously assigned the empirical formula C, H14NzS, he considered the saturated cyclic thioureas I and 11, deciding in ...
