Hans von Pechmann
Hans von Pechmann | |
|---|---|
| Born | 1 April 1850 |
| Died | 19 April 1902 (aged 52) |
| Nationality | German |
| Alma mater | University of Greifswald |
| Known for | Pechmann condensation Diazomethane |
| Scientific career | |
| Fields | organic chemistry |
| Institutions | University of Munich University of Tübingen |
| Doctoral advisor | Heinrich Limpricht |
| Doctoral students | William Hobson Mills Julius B. Cohen |
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.