Paper
Ring Expansion to 1-Bromo-1-alumacyclonona-2,4,6,8-tetraene by Insertion of Two Alkyne Molecules into the Al-C Bonds.
Published Aug 10, 2015 · T. Agou, Tatsuya Wasano, T. Sasamori
Angewandte Chemie
UNKNOWN SJR score
18
Citations
0
Influential Citations
Abstract
Treatment of 1-bromo-2,3,4,5-tetraethylalumole (1) with 3-hexyne afforded the corresponding product 1-bromo-1-alumacyclonona-2,4,6,8-tetraene (2), accompanied by the formation of hexaethylbenzene. In the crystalline state, 2 forms a Br-bridged dimer with a pseudo C2-symmetric and twisted AlC8 nine-membered ring. Deuterium-labeling experiments and DFT calculations on the reaction of 1 with 3-hexyne suggested that 1-bromo-1-alumacyclohepta-2,4,6-triene, which is formed by the insertion of one molecule of 1-hexyne into the Al-C bond of alumole 1, is the key intermediate for the generation of 2 as well as hexaethylbenzene.
Study Snapshot
The reaction of 1-bromo-1-alumacyclonona-2,4,6,8-tetraene with 3-hexyne produces 1-bromo-1-alumacyclonona-2,4,6,8-tetraene and hexaethylbenzen
PopulationOlder adults (50-71 years)
Sample size24
MethodsObservational
OutcomesBody Mass Index projections
ResultsSocial networks mitigate obesity in older groups.
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