Die chemie van die indeenfotodimeer en verwante verbindings

Abstract

Oxidation of the crude dimer of indene, produces the diketone (XII), as well as a small quantity of a-truxone (XVI). The diketone (XII) reacts like a typical carbonylic compound when treated with reducing agents such as lithium aluminium hydride, methyl magnesium iodide and phenyl magnesium bromide, to produce the di-indene derivatives XXVII, XXIX and XXX. An attempt to prepare the pseudo-aromatic system I by dehydrating XXVII in ethanolic hydrochloric acid, was unsuccessful. A similar reaction carried out with XXIX produces an orange-coloured product, which is most probably a mixture of sym-dimethyl-dibensofulvalene (XXXIII) and the bi -indenyl derivative XXXIV.