Figure 2 from Thermodynamic analysis of strain in the five-membered oxygen and nitrogen heterocyclic compounds. | Semantic Scholar
File:Aromaticity and antiaromaticity in three and five membered ring ions.png - Wikimedia Commons
Pd-pincer complexes containing six-membered rings that are more active allylation catalysts than five-membered ring analogues | Catalysis | ChemRxiv | Cambridge Open Engage
Metal-catalyzed synthesis of five-membered ring N-heterocycles. A recent update | SpringerLink
Schematic diagrams of the considered five-membered ring heterocyclic... | Download Scientific Diagram
Pd-pincer complexes containing six-membered rings that are more active allylation catalysts than five-membered ring analogues | Catalysis | ChemRxiv | Cambridge Open Engage
Enantioselective Synthesis of Five-Membered-Ring Atropisomers with a Chiral Rh(III) Complex | Organic Letters