Johannes Thiele (chemist)
- Johannes Thiele (chemist)
Infobox_Scientist
name = Friedrich Karl Johannes Thiele
caption = Friedrich Karl Johannes Thiele
birth_date = birth date|1865|5|13
birth_place = Ratibor, Prussia, now Racibórz, Poland
death_date = death date and age|1918|4|17|1865|5|13
death_place = Straßburg, German Empire, now Strasbourg, France
residence =
nationality = German
field = Chemistry
work_institution = University of Munich, University of Straßburg
alma_mater = University of Halle
doctoral_advisor = Jacob Volhard
doctoral_students = Heinrich Otto Wieland
known_for =
prizes =
religion =
footnotes = 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. [cite journal
author = Thiele, J.
title = Ueber Ketonreactionen bei dem Cyclopentadiën
journal = Berichte der deutschen chemischen Gesellschaft
volume = 33
pages = 666–673
year = 1900
doi = 10.1002/cber.190003301113]
Nobelist Heinrich Otto Wieland was his student.
References
*cite journal
author =
title = Johannes Thiele
journal = Zeitschrift für Angewandte Chemie
volume = 31
issue = 49
pages = 117–118
year = 1918
doi = 10.1002/ange.19180314901
*cite journal
author = Fritz Straus
title = Obituary: Johannes Thiele (1865-1918)
journal = Berichte der deutschen chemischen Gesellschaft
volume = 60
issue = 6
pages = A75–A132
year = 1927
doi = 10.1002/cber.19270600633
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