
%0 Journal Article
%A Langler, Richard Francis 
%A Bewick, Sharon Anne 
%T [4];Radialene Dication is an Unusual Hydrocarbon Monocycle: PM3 Evidence for a 4<emph type="2">N</emph>+2 Antiaromatic Structure
%J Australian Journal of Chemistry
%D 2000/10/27
%V 53
%N 7
%P 623-624
%K Antiaromatic monocycle; PM3 computations; ground-state multiplicity.
%R https://doi.org/10.1071/CH00080
%U https://www.publish.csiro.au/paper/CH00080 
%X A PM3 computational study (RHF method) of radialene dications has uncovered the first non-trivial example of an antiaromatic hydrocarbon monocycle bearing 4N+2 p-electrons. This system has disjoint frontier molecular orbitals and constitutes the first example of a structure with degenerate lowest-lying singlet and triplet states, even though it is not a H&#220;ckel triplet. 
