| Conrad Laar | |
|---|---|
 | |
| Born | (1853-03-22)22 March 1853 Hamburg, Germany |
| Died | 11 February 1929(1929-02-11) (aged 75) Bonn Germany |
| Nationality | German |
| Known for | coining the expression tautomerism |
| Awards | Nobel prize |
| Scientific career | |
| Institutions | Universität Bonn |
Conrad Peter Laar (22 March 1853 – 11 February 1929) was a German chemist. He coined the expression tautomerism in 1885. He also observed the double bond rule in 1885, stating elements with a principal quantum number greater than 2 for their valence electrons (period 3 elements and higher) tend not to form multiple bonds.
References
- Pfeiffer (1929). "Conrad Laar (1853 - 1929)". Angewandte Chemie. 42 (49): 1117. Bibcode:1929AngCh..42.1117P. doi:10.1002/ange.19290424902.
- Laar, Conrad (1885). "Ueber die Möglichkeit mehrerer Strukturformeln für dieselbe chemische Verbindung". Berichte der Deutschen Chemischen Gesellschaft. 18: 648–657. doi:10.1002/cber.188501801141.
- Bernard E. Hoogenboom (1998). "A History of the Double-Bond Rule". ACS Publications. 75 (5): 1. Bibcode:1998JChEd..75..596H. doi:10.1021/ed075p596.