Synthesis and Ligand Properties of a Persistent, All-Carbon Four-Membered-Ring Allene

摘要

As early as the end of the nineteenth century, Adolf von Baeyer introduced the concept of ring strain,and it is now well recognized that the strain energy increases with decreasing ring size from six to three atoms. This phenomenon is even more pronounced for cyclic allenes,because of the rigidity and linearity of the CCC fragment.