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[a] von Pechmann (1 April 1850 – 19 April 1902) was a German chemist, renowned for his discovery of diazomethane in 1894.[1][2] Pechmann condensation[3][4] and Pechmann pyrazole synthesis.[5] 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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