FORMATION OF THE DIGALLIUM COMPOUND [(H5C6)(2)N-3](R)GA-GA(R)[N-3(C6H5)(2)] WITH 2 BIS(TRIMETHYLSILYL)METHYL GROUPS AND 2 TERMINAL CHELATING DIPHENYLTRIAZENIDO LIGANDS

Tetrakis[bis(trimethylsilyl)methyl]diagallane(4) 1 reacts with 1,3-dip henyltriazene to yield two compounds, which were both characterized by a crystal structure determination. The gallium-gallium bond is retain ed in the yellow derivative [(H5C6)(2)N-3](R)Ga-Ga(R)[N-3(C6H5)(2)] 2 [R = CH(SiMe(3))2], which is formed by a ligand exchange reaction and shows two terminal chelating triazenido ligands besides two bis(trimet hylsilyl)methyl groups; the Ga-Ga bond length is 245.79(6) pm. The sec ond product is the orange dialkyl(diphenyltriazenido)gallium derivativ e R(2)Ga[N-3(C6H5)(2)] 3, where the triazene has reacted as an oxidant by the clevage of the Ga-Ga bond and probably by release of elemental hydrogen.