Geometrical structure and energetics of Closs's diradical: 1,3-cyclopentadiyl Conrad, Morgan P. ; Pitzer, Russell M. ; Schaefer, Henry F., III Abstract Publication: Journal of the American Chemical Society Pub Date: April 1979 DOI: 10.1021/ja00502a073 Bibcode: 1979JAChS.101.2245C