Pechmann, Hans, Freiherr von, 1850-1902
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מספר מערכת
987007594614605171
Information for Authority record
Name (Latin)
Pechmann, Hans, Freiherr von, 1850-1902
Date of birth
1850
Date of death
1902
Gender
male
MARC
MARC
Sources of Information
- Volhard's Anleitung zur qualitativen chemischen Analyse, 1920:t.p. (Hans Pechmann)
- OCLC, Sep. 12, 2011(hdg: Pechmann, Hans, Freiherr von, 1850-1902)
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Hans von Pechmann
Unknown author, Public domain
File:Chemicals-HP.jpg
Hey Paul from State College, PA, United States, CC BY 2.0
File:Hans v Pechmann ca1899.jpg
Unknown author, Public domain
Wikipedia description:
Hans Freiherr von Pechmann (1 April 1850 – 19 April 1902) was a German chemist, renowned for his discovery of diazomethane in 1894. Pechmann condensation and Pechmann pyrazole synthesis. He also first prepared 1,2-diketones (e.g., diacetyl), acetonedicarboxylic acid, methylglyoxal and diphenyltriketone; established the symmetrical structure of anthraquinone. Von Pechmann also produced the first example of solid polyethylene serendipitously in 1898, via the decomposition of diazomethane.
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