In further pursuit of the carbene analogy: preparation and crystal structure of (N,N,N ′,N ′-tetramethylethylenediamine)potassium [cis-ethene-1,2-di(tert-butylamido)]gallate(I)

Reduction of cis-ethene-1,2-di(tert-butylamido)gallium(III) chloride with metallic potassium in the presence of N,N,N′,N′-tetramethylethylenediamine gives the title compound which has a novel dimeric structure with the potassium cations η5-coordinated to the pseudo-carbene ring system of one monomer and η1-bonded to the gallium atom of the other.