Generation of dimethylenecyclobutenes from cyclobutadieneiron tricarbonyl complexes. Synthesis of cyclobutadienopleiadiene and .alpha.,.alpha.,-diphenyldimethylenecyclobutene
Generation of dimethylenecyclobutenes from cyclobutadieneiron tricarbonyl complexes. Synthesis of cyclobutadienopleiadiene and .alpha.,.alpha.,-diphenyldimethylenecyclobutene