Jacob Volhard, born on July 4, 1834 in Darmstadt, Grand Duchy of Hesse and by Rhine, was known for the VolhardErdmann cyclization and the HellVolhardZelinsky halogenation.
Jacob Volhard (4 June 1834  14 January 1910) was the German chemist who discovered, together with his student Hugo Erdmann, the VolhardErdmann cyclization reaction. 
