P. Boldt et al., (1-ALPHA,6-ALPHA,7-ALPHA,8-ALPHA,12-ALPHA .0(7,17).0(16,24),24]TETRACOSA-5(23),16(24)-DIENE, A HYPERSTABLE ALKENE, Chemische Berichte, 127(1), 1994, pp. 219-221
Hydrogenation of the cis-photodimer 1 of acenaphthylene yields the tit
le compound 2, which, though still containing two double bonds, underg
oes no further hydrogenation or reaction with bromine for steric reaso
ns. The cyclobutane ring of 2 shows strong steric distortions as revea
led by X-ray analysis as well as by force-field and semiempirical MO c
alculations.