Scheme 4.

a) Lewis structures of alkali‐metal diazadiene radical compounds 10 and 11 (top; one mesomeric structure) and SOMO of the dme‐free lithium derivative [Li(DAD)] (bottom). b) Dinuclear gallium diazadiene radical complex 12 (Ar=2,6‐iPr₂‐C₆H₃). c) Lewis structure (top; one mesomeric structure) and Mulliken spin‐density plot (bottom) of electrochemically generated bismuth radical compound 13. Adapted from Ref. 55 and Ref. 57 with permission of Wiley‐VCH and The Royal Society of Chemistry, respectively.