Theodor Zincke

Theodor Zincke (around 1900)

Ernst Carl Theodor Zincke (born May 19, 1843 in Uelzen ; † March 17, 1928 in Marburg ) was a German chemist who was a professor at the University of Marburg from 1875 to 1913 . The Zincke reaction , the Zincke-Suhl reaction and the Zincke nitration are named after him.

Life

Theodor Zincke was born in Uelzen in 1843. He initially completed an apprenticeship as a pharmacist and from 1863 was employed at a pharmacy in Clausthal , where he was mainly employed in the laboratory. At the mountain academy Clausthal he participated as a guest student in courses in metallurgy , mineralogy , chemistry and geology part. In 1865 he went to a pharmacy in Hamburg , two years later he matriculated at the University of Göttingen . He studied pharmacy and completed further studies in chemistry, among which Friedrich Wöhler was one of his teachers. During his studies in Göttingen in 1867 he became a member of the Brunsviga fraternity .

In 1869 he received his doctorate in Göttingen under Rudolph Fittig , then he went to the University of Bonn and worked there in August Kekulé's group . After completing his habilitation in Bonn in 1872 and being appointed associate professor a year later , he became a full professor at the University of Marburg three years later , where he remained until his retirement in 1913. His successor in 1913 was Karl von Auwers , previously director of the Chemical Institute at the University of Greifswald .

Theodor Zincke died in Marburg in 1928. His students included Karl Theophil Fries and the later Nobel Prize winner Otto Hahn , who did his doctorate in 1901 under Zincke.

Scientific achievement

Zincke-Suhl reaction

Theodor Zincke was accepted into the German Academy of Sciences Leopoldina in 1883 . Various reactions in organic chemistry are named after him, such as the Zincke-Suhl reaction, a special case of Friedel-Crafts alkylation , zinc nitration, Zincke disulfide cleavage and the Zincke reaction or Zincke-König Cleavage called ring opening of pyridine compounds to so-called Zincke salts. This reaction is important in pharmaceutical analysis and is mentioned, for example, in the European Pharmacopoeia (Ph. Eur. NT) in the monograph on nicotinamide .

literature

• Karl Fries: Theodor Zincke (1843-1928). In: Reports of the German Chemical Society. Department A: Association news. Volume 62, Volume 3 from March 6, 1929, pp. A17 − A45
• Zincke, Theodor. In: Otto Wenig (Ed.): Directory of professors and lecturers at the Rheinische Friedrich-Wilhelms-Universität zu Bonn 1818–1968. Bouvier, Bonn 1968, ISBN 3-41-600495-7 , p. 347
• Eberhard Stumpp: Research and teaching at the chemical laboratory of the Royal Mining Academy in Clausthal at the turn of the 19th to the 20th century. In: TUContact. University magazine of the Clausthal University of Technology. Issue 16 (May 2005). Published by the Verein von Freunde der TU Clausthal, pp. 31–37, ISSN  1435-2575 (for Theodor Zincke, see pp. 33/34)

Individual evidence

1. ↑ see Hessisches Staatsarchiv Marburg (HStAMR), Best. 915 No. 5731, p. 181 ( digitized version ).
2. ^ Ernst Elsheimer (ed.): Directory of the old fraternity members according to the status of the winter semester 1927/28. Frankfurt am Main 1928, p. 591.