1. Anticonvulsants. II. Spiro Compounds. Dibenzo[α,d]cycloheptadiene-5,5'-hydantoins, -5,5'-oxazolidinediones, and -5,2'-succinimides
2. New Psychotropic Agents. Derivatives of Dibenzo[a,d]-1,4-cycloheptadiene
3. Dehydration of Alcohols in Dimethyl Sulfoxide1,2
4. In our experience these protons are “equivalent” when C5 of the dibenzocycloheptene system I is trigonal, or, symmetrically substituted, and, in the dibenzazulene system only when C11b is trigonal. In other situations, e.g., IV, V, VIII, III and XV, the four protons of the bridge are non-equivalent and their signal is split into a complex multiplet.