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EspañolHANS VON PECHMANN
'Hans von Pechmann' (1850 - 1902) was a German chemist, renowned for his discovery of diazomethane,[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 discovered polyethylene plastics serendipitously, when accidentally heating diazomethane.
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 in 1902.
1. Ueber Diazomethan, H. v. Pechmann, , , Berichte der deutschen chemischen Gesellschaft, 1894
2. Ueber Diazomethan, H. v. Pechmann, , , Berichte der deutschen chemischen Gesellschaft, 1895
3. Ueber die Verbindungen der Phenole mit Acetessigäther, H. v. Pechmann, Carl Duisberg, , , Berichte der deutschen chemischen Gesellschaft, 1883
4. Neue Bildungsweise der Cumarine. Synthese des Daphnetins, H. v. Pechmann, , , Berichte der deutschen chemischen Gesellschaft, 1884
5. Pyrazol aus Acetylen und Diazomethan, H. v. Pechmann, , , Berichte der deutschen chemischen Gesellschaft, 1898
★ Partington, J. R. ''A History of Chemistry''. Macmillan: 1964; vol. 4, p. 838-839.
Von Pechmann also discovered polyethylene plastics serendipitously, when accidentally heating diazomethane.
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 in 1902.
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References
1. Ueber Diazomethan, H. v. Pechmann, , , Berichte der deutschen chemischen Gesellschaft, 1894
2. Ueber Diazomethan, H. v. Pechmann, , , Berichte der deutschen chemischen Gesellschaft, 1895
3. Ueber die Verbindungen der Phenole mit Acetessigäther, H. v. Pechmann, Carl Duisberg, , , Berichte der deutschen chemischen Gesellschaft, 1883
4. Neue Bildungsweise der Cumarine. Synthese des Daphnetins, H. v. Pechmann, , , Berichte der deutschen chemischen Gesellschaft, 1884
5. Pyrazol aus Acetylen und Diazomethan, H. v. Pechmann, , , Berichte der deutschen chemischen Gesellschaft, 1898
★ Partington, J. R. ''A History of Chemistry''. Macmillan: 1964; vol. 4, p. 838-839.
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