Hermann Sachse (chemist)
Hermann Sachse (born May 31, 1862 in Gera , † 1893 in Berlin ) was a German chemist ( organic chemistry ). He was a pioneer of the stereochemistry and conformation theory of rings, which was further developed by Ernst Mohr from 1916 ( Sachse-Mohr theory ).
Sachse received his doctorate in Berlin in 1889 and was assistant to Augustyn Bistrzycki (1862–1936) at the TH Berlin-Charlottenburg .
In 1890, Sachse was the first to point out that, due to the tetrahedral arrangement of the bonds in carbon, there can be spatially different conformations of cyclohexane and that cyclohexane is not, as Adolf von Baeyer assumed, even (albeit with tensions in the bonds that increased according to Baeyer more carbon atoms were in the rings). Initially, this received little attention, even if Ernst Mohr ( Sachse-Mohrsche theory ) took up this around 1916, and until the 1920s the idea that cyclohexane was just like benzene dominated. It was only with the work of Leopold Ruzicka in the 1930s on rings with even more carbon atoms (which had previously been thought not possible) that the spatial image of cyclohexane with multiple configurations prevailed.
Fonts
- with Ernst Mohr: On the conformation of cyclohexane. Ostwald's Classics of Exact Sciences , 274.
- Geometric isomers of hexamethylene derivatives. Reports Deutsche Chem. Ges., 1890.
literature
- Poggendorff: Biographical-literary concise dictionary for the history of exact sciences , Volume 4, II. Department, 1904, p. 1296.
Individual evidence
- ^ An exception was Carl Adam Bischoff in Riga
- ^ Joseph Fruton: Contrasts in Scientific Style. Research Groups in the Chemical and Biochemical Sciences, American Philosophical Society, 1990, pp. 137f.
| personal data | |
|---|---|
| SURNAME | Sachse, Hermann |
| BRIEF DESCRIPTION | German chemist |
| DATE OF BIRTH | May 31, 1862 |
| PLACE OF BIRTH | Gera |
| DATE OF DEATH | 1893 |
| Place of death | Berlin |