A stabilization rule for metal carbido cluster bearing μ3-carbido single-atom-ligand encapsulated in carbon cage

Syntheses and Isolation of VSc₂C@C₈₀ (I, II) and VSc₂C@C₇₈

V-based μ₃-CCFs, including two isomers of VSc₂C@C₈₀ (labeled as I, II) and VSc₂C@C₇₈ were synthesized by Krätschmer-Huffman direct current (DC) arc discharge method¹⁹. Graphite rods packed with a mixture of Sc₂O₃, VC and graphite powder with a molar ratio of 0.5:1:15 were vaporized in the arcing chamber under a 200 mbar helium atmosphere. The obtained soot was then extracted with carbon disulfide (CS₂), followed by four-step high-performance liquid chromatography (HPLC) isolations supplemented by laser…