F. Toda, Hiroharu Motomura, Hirofumi Oshima
Feb 1, 1974
Citations
0
Influential Citations
28
Citations
Journal
Bulletin of the Chemical Society of Japan
Abstract
The thermal [2+2]cycloaddition products of 1-chloro-(II) and 1-bromo-2-(9-fluorenylidene)ethylene (X) were found to be two head-to-tail dimers, fluorene-9-spiro-1′-[2′-chloro-3′-(9-fluorenylidene)-4′-chloromethylene]cyclobutane (VI) and its bromo-analog (XI) respectively.