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August-vilhelm Hofmann

Picture of August-vilhelm Hofmann

Date of Birth: 08/04/1818

Age: 74

Place of birth: Giessen

Citizenship: Germany

Background

August Wilhelm Hofmann was born in Giessen on April 8, 1818. He graduated from the University of Giessen, where his teacher was Yu.Libih. After receiving a doctorate in chemistry, she became his assistant (1843) and then assistant professor, University of Bonn (1845). From 1845 Hoffmann - the first director based in the same year the Royal Chemical College in London, where he worked for 20 years. In 1865 he headed the Department of Chemistry at the University of Berlin and held this position until his death. In 1868 he founded the German Chemical Society.

The central theme of the works of Hoffmann - synthesis and study of amines. In 1843 he showed that the products produced at different times Unferdorbenom (1826), Runge (1837), Fritzsche (1841), Zinin (1842) by distillation of coal tar and considered different substances, in fact, are one and the same compound he called after Fritzsche aniline. In 1845Gofman isolated from coal tar benzene. In 1850 showed that ethyl iodide when heated with ammonia formed amines. In 1881, he proposed a process for preparing primary amines from amides of carboxylic acids (Hofmann reaction). In 1856 in the laboratory of his pupil U.Perkin Hoffmann was the first aniline dye - mauveine. Sam Hoffman synthesized aniline dye red (magenta), formaldehyde, hydrazobenzene, isonitriles. Hoffman, one of the first to recognize and put into practice a new educational system of atomic weights, and put forward S.Kannitstsaro A.Avogadro based on conjecture. He developed many chemical experiments demonstration, which are still used today. His introduction to modern chemistry (Einleitung in die moderne Chemie, 1865) was one of the most popular scientific benefits of the time. In 1888, Hoffman received a knighthood. Hofmann died in Berlin on May 5, 1892.