title: Aromaticity of butalene and its homologues.
abstract: [structure: see text] The aromaticity of a series of fused cyclobutadiene systems is discussed in terms of their resonance energies. While there is considerable variation in their resonance energies per pi electron, all members of the series are calculated to be antiaromatic, though to a lesser degree than the parent cyclobutadiene.
authors.affiliation: Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37205, USA. hessba@ctrvax.vanderbilt.edu
authors.forename: B Andes
authors.initials: BA
authors.lastname: Hess
authors.forename: Lawrence J
authors.initials: LJ
authors.lastname: Schaad