His earlier work included an investigation of succinic acid, and the preparation of phenyl cyanide (benzonitrile), the simplest nitrile of the aromatic series; but later his time was mainly occupied with questions of technology and public health rather than with pure chemistry.
The aromatic amine resembling the aliphatic amines is benzylamine, C 6 H 5 ï¿½CH 2 ï¿½NH 2, which may be prepared by reducing benzonitrile in alcoholic solution by means of zinc and acetic acid (0.
Allyl cyanide boils at 119° C. Benzonitrile boils at 190.6° C. When solidified it melts att7° C. It is easily soluble in alcohol and ether.
1868, 148, p. 51); by hydrolysis of benzonitrile or of hippuric acid; by the action of carbon dioxide on benzene in the presence of aluminium chloride (C. Friedel and J.
Braun (Ber., 1904, 37, p. 2915) showed that benzoyl piperidine, when heated with phosphorus pentachloride to 200° C. in sealed tubes, yields benzonitrile, and pentamethylene dichloride, thus leading to a simple method of preparing pentamethylene compounds.