The yield was about 45%. This reaction is similar evidently to the pyrolysis of triphenylmethyl chloride, wherein hydrogen chloride was detached at temperatures above 200'and 9- phenylfluorene formed. Similar also is the production of phenyl-a-naphthofluorene by refluxing diphenyla-naphthylchloromethane6 with zinc chloride in acetic acid.
