Discussion In the early phase of the work, a mixture of cis-and trans-1, 4-dichlorobutene-2 was allowed to react with hexachlorocyclopentadiene. A solid product (I, 1n. p. 101-102') and a liquid product (11, bp 140-144'(0.1 mm.)) were obtained. Both of these products had the composition expected for the adduct. It was also demonstrated that the adduct of 3, 4- dichlorobutene-1 and hexachlorocyclopentadiene was identical to the liquid product 11.
![Bicyclo[2.2.1]hepta-2,5-diene-2,3-dimethanol,1,4,5,6,7,7-hexachloro- Structure](https://image.chemsrc.com/caspic/141/2694-25-9.png)
