Five membered rings do have such stabilising factors but not equal to that of six membered counter parts. Endgroup orthocresol Feb 27 19 at 2258 begingroup Note also that a ring expansion would lead…
5 Membered Ring
7 Membered Ring
McAfee JGreg Nordahl John P. Among them 52 cycloaddition provides direct access to sevenmembered ring systems which constitute thestructural core of many biologically important substances and natura…
