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Digitale Medien

Tri-, Tetramethylbullvalene und Hexamethylbibullvalenyl (1993)

Rebsamen, Karl ; Schröder, Gerhard

Weinheim : Wiley-Blackwell

Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 1419-1423

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Details

ISSN: 0009-2940

Schlagwort(e): Cope rearrangement ; Bullvalenes, tri-, tetramethyl- ; Bibullvalenyl, hexamethyl ; Chemistry ; Inorganic Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: Tri-, Tetramethylbullvalenes and HexamethylbibullvalenylThe known monomethylbullvalenes 6 and dimethylbullvalenes 7 are supplemented by tri-8 and tetramethylbullvalenes 9 as well as the hexamethylbibullvalenyl 10. The isomer distributions of the methylbullvalenes 6-9 are determined by NMR-spectroscopy. A vicinal arrangement of two methyl groups is not found. The 4-, 6-, 10-positions are slightly preferred in respect to the 3-, 7-, 9-positions. In the case of the methylbullvalenes 8 and 9 methyl groups occupy additionally the 1-, 2-, 8- but not the 5-position. Contrary to tetrabromobullvalenes 5, isomers of 9 show no pronounced kinetic stability.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/cber.19931260622

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