SEARCH Articles Figures Tables Cyclobutadien Cyclobutadiene Cyclobutadiene dimerization Cyclobutadiene dimerization Cyclobutadiene dimers Cyclobutadiene dimers Cyclobutadienes Cyclobutadienes from alkyne dimerization Cyclobutadienes, dimerization Cyclobutanation Cyclobutadienes, dimerization intramolecular Dimerization of Cyclobutadiene