Fig. 1: Literature examples.

Selected examples of a Mn–Mn single bond by Dahl et al.¹, c Ni–Ni double bond by Koenig et al.⁷, d V–V triple bond by Cotton et al.⁸, b Re–Re quadruple bond by Cotton et al.⁹, e Cr–Cr quintuple bond by Nguyen et al.¹⁰, f Au–Ag single bond by Olmos et al.¹⁹, g Cu–Ag single bond by Desnoyer et al.²⁰, and h I–Ag single bond of the present study.