Hans von Pechmann
| Hans von Pechmann | |
|---|---|
 |
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| Born | 1 April 1850 Nürnberg |
| Died | 19 April 1902 (aged 52) Tübingen |
| Residence | Germany |
| Nationality | German |
| Fields | organic chemistry |
| Institutions | University of Munich University of Tübingen |
| Alma mater | University of Greifswald |
| Doctoral advisor | Heinrich Limpricht |
| Doctoral students | William Hobson Mills Julius B. Cohen |
| Known for | Pechmann condensation Diazomethane |
Hans 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 discovered polyethylene plastics serendipitously in 1898, when accidentally heating diazomethane.
He was born in Nürnberg. After studying with Heinrich Limpricht at the University of Greifswald he became Professor at the University of Munich till 1895. He was professor at the University of Tübingen from 1895 till his death at Tübingen, aged 52.
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