The product did not depress the melting point of a sample of diphenyl~ juccindene-10, mp 205.4-207.8", prepared essentially according to Brand and Muller4; the final reduction of 9, 12-dichlorodiphenyIsuccindadiene-9, 12 was conducted with zinc dust in refluxing acetic acid solution (37% yield of crystallized product; found: C, 94.02; H, 6.00; absorption spectrum in ethanol: max. 310 mp, log E 4. iX).
