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