V. Domingo, J. Castaǹer, J. Riera
Jul 1, 1994
Citations
0
Influential Citations
2
Citations
Journal
Journal of Organic Chemistry
Abstract
Perchloroheptafulvene (4) is prepared by photoisomerization of perchloro-p-xylene (1) in a surprising and key-step solid-state ring-expansion reaction yielding perchloro-1-methyl-1,3,6-cycloheptatriene (9), followed by dechlorination of 9 with SnCl 2 -2H 2 O. X-ray analyses of 9 and 4 are reported and discussed in relation to the already known crystal structure of xylene 1 suggesting that in the first step the strained molecular geometry of 1 assists its ring expansion