Katalytische Cyclisierung von Acetylen und substituiertem Acetylen zu aromatischen Kohlenwasserstoffen
✍ Scribed by G. Dändliker
- Publisher
- John Wiley and Sons
- Year
- 1969
- Tongue
- German
- Weight
- 430 KB
- Volume
- 52
- Category
- Article
- ISSN
- 0018-019X
No coin nor oath required. For personal study only.
✦ Synopsis
Summavy. The pentalialogenidcs of niobiuin and tantalum and some tungsten chloriclcs catalize the cyclotrimerization of acctylenic hydrocarbons to form aromatic compounds. Acetylene is converted into benzene a t atmospheric pressure and tcmperatures between -20 and 130°C. IJndcr similar conditions mcthylacetylene and but-1-yne respcctivcly yield a mixture of thc corresponding 1,2,4-and 1,3,S-substituted benzenes while with but-2-ync hexamethyl benzene is obtained. Cocyclization between acetylene and substitutcd acetylenes or diacetylene is possible; in this case monoand disubstituted benzenes or biphenyl, terphcnyl, and polyphenyls arc formed. ' ) Die Produktion dicser Chloride wurde mit Wirkung ah 1. Juli 1968 an die Firma HERMA" C. STARCK, Berlin, Wcrk Laufenburg (Badcn) iibertragen.