%A MAA Walczak %A BK Shin %A P Wipf %A S Saxena %J Organic and Biomolecular Chemistry %T An ESR analysis of the mechanism of pericyclic reactions of bicyclobutane %X Experimental and simulated ESR data are in good agreement with a biradical mechanism for the intramolecular pericyclic reactions of bicyclo[1.1.0]butanes. ? The Royal Society of Chemistry 2009. %N 11 %P 2363 - 2366 %V 7 %D 2009 %R 10.1039/b815469b %L pittir19046