Subvalent mixed SiGe oligomers: (ClSi)Ge and Cl(MeEtN)SiGe(SiCl).

(ClSi)Ge (1; 91%) is accessible from GeCl, the SiCl/[BuN]Cl silylation system, and excess SiCl. A key intermediate step involves Cl sequestration with AlCl in the course of the reaction between the first-formed germanide [(ClSi)Ge] and SiCl. The related adduct Cl(MeEtN)SiGe(SiCl) (2; quantitative conversion) was prepared either by amine-induced cleavage of 1 or by a bottom-up synthesis starting from GeCl and SiCl.