Abstract: Three nonconjugated aryl olefins, having well-defined but varied interorbital angles between the chromophores, have been studied: 2-methylenebenznorbornene (MBN), 2- ethylidene-I-methylindan (EMI), and 1-ethylidene-8, 9-benzospiro [3.5]-nonane (ESO). The latter two are new compounds and their syntheses are detailed. In all cases, photoelectron, ultraviolet absorption, and fluorescence emission spectra have been measured. The ...
