ISSN:
0009-2940
Keywords:
Cope rearrangement
;
Bullvalenes, tri-, tetramethyl-
;
Bibullvalenyl, hexamethyl
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19931260622
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