0000-0002-8635-8390 This is a follow up to my earlier post about C⩸N+, itself inspired by this ChemRxiv pre-print which describes a chemical synthesis of singlet biradicaloid C2 and its proposed identification as such by chemical trapping. First row diatomics based on the iso-electronic principle of eight valence electrons include both C⩸N+ and C⩸C, as well as species […]