The reaction of ‘GaI’ with a 1,3-diyne: synthesis, characterisation and reactivity of a novel C–C coupled ene–diyne–bis(gem-organodigallium(iii)) complex

Abstract

Treatment of ‘GaI’ with a 1,3-diyne, Me₃SiCCCCSiMe₃, leads to C–C coupling reactions and the isolation of the novel organogallium species, [Ga₄I₈{C₈(SiMe₃)₄}], as two isomeric forms; their X-ray crystal structures show them to contain the first structurally authenticated gem-organodigallium fragments and to exhibit rare examples of Ga–alkyne π-interactions.