9-Phenethylfluorene and its dehydro derivatives

Abstract

9-Phenethylfluorene, 9-phenylethylidenefluorene, β-9-fluorenylstyrene, and spiro-1-(9-fluorenyl)-2-phenyl-cyclopropane have been synthesised and their structure established. Certain erroneous statements about 2-(9-fluorenyl)-1,1-diphenylethene and 2-fluorenylidene-1,1-diphenylethane have been corrected and the isomerisation of these substances compared with that of 9-phenylethylidenefluorene and β-9-fluorenylstyrene and of 1,3,3- and 1,1,3-triphenylpropene.