Rw. Mccabe et al., ORGANOMETALLIC FULGIDES .1. SYNTHESIS AND PHOTOCHEMISTRY OF FERROCENYL FULGIDES [FERROCENYLETHYLIDENE(ISOPROPYLIDENE)SUCCINIC ANHYDRIDES], Journal of the Chemical Society. Perkin transactions. I, (9), 1993, pp. 1023-1029
A series of novel ferrocenyl fulgides have been synthesised and their
photochemistry examined. Z/E Isomerisation of the alkylidene double bo
nd was observed in each case, without the accompanying photochromic ri
ng-closure to the tricyclic dihydronaphthalene derivatives observed wi
th organic fulgides. A pi-Huckel MO treatment of a model cyclopentadie
nylbutadiene fragment was used to explain the lack of desired photoche
mical ring-closure.