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| Friedrich Karl Johannes Thiele | |
| Born | May 13, 1865 Ratibor, Prussia, now Racibórz, Poland |
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| Died | April 17, 1918 (aged 52) Straßburg, German Empire, now Strasbourg, France |
| Nationality | German |
| Fields | Chemistry |
| Institutions | University of Munich, University of Straßburg |
| Alma mater | University of Halle |
| Doctoral advisor | Jacob Volhard |
| Doctoral students | Heinrich Otto Wieland |
Friedrich Karl Johannes Thiele (May 13, 1865 – April 17, 1918) was a German chemist and a prominent professor at several universities, including those in Munich and Strasbourg. He developed many laboratory techniques related to isolation of organic compounds. In 1917 he described a device for the accurate determination of melting points, since named Thiele tube after him.
Early days
Thiele was born in Ratibor, Germany, now Racibórz, Poland.
Contributions to organic chemistry
Johannes Thiele was ahead of his time in organic chemistry. After Kekulé's proposal for benzene structure in 1865, he predicted the resonance that existed in benzene in 1899 and proposed a resonance structure, by using a broken circle to represent the partial bonds.
He discovered the condensation of ketones and aldehydes with cyclopentadiene as a route to fulvenes. He also recognized that these deeply colored species were related to but isomeric with benzene derivatives.[1]
Nobelist Heinrich Otto Wieland was his student.
References
- ^ Thiele, J. (1900). "Ueber Ketonreactionen bei dem Cyclopentadiën". Berichte der deutschen chemischen Gesellschaft 33: 666–673. doi:.
- "Johannes Thiele" (1918). Zeitschrift für Angewandte Chemie 31 (49): 117–118. doi:.
- Fritz Straus (1927). "Obituary: Johannes Thiele (1865-1918)". Berichte der deutschen chemischen Gesellschaft 60 (6): A75–A132. doi:.
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