How long are Ga⇆Ga double bonds and Ga–Ga single bonds in dicationic gallium dimers?

• DOI: 10.1039/d2cc06377h
• Publication Date: 2022-12-20T10:01:44Z
• Authors: Antoine Barthélemy; Harald Scherer; Hanna Weller; Ingo Krossing
• Keywords: Single bond

Syntheses and characterization of two salts [(L)GaGa(L)][pf]2 ([pf]- = [Al(ORF)4]-; RF C(CF3)3) are reported. They include the first dicationic digallene [(L)Ga⇆Ga(L)]2+ (L CDPPh C(PPh3)2) a digallane [(L)Ga-Ga(L)]2+ [NacNacMes]-). The CDPPh-supported dication includes trans-bent [L-GaGa-L]2+ bond that is analogous to neutral R-GaGa-R molecules related Robinson's famous "Digallyne" [R-GaGa-R]2-. widely used "Jones magnesium dimer", but very short GaII-GaII single bond.