GALLIUM-NITROGEN COMPOUNDS PREPARED BY DIHYDRONAPHTHALENE AND THERMALELIMINATION-REACTIONS - CRYSTAL AND MOLECULAR-STRUCTURES OF [(PHME2CCH2)(2)GANH(T-BU)](2) AND [(H4C6)ME2CCH2]GA[NH(T-BU)](2)GA(CH2CME2PH)(2)

The dihydronaphthalene elimination reaction between Na-2[C10H8(GaR2Cl) (2)}] (R = CH2CMe3, CH2CMe2Ph) and t-BuNH2 provided a room-temperature route to [R2GaNH(t-Bu)](2). However, when Ga(CH2CMe2Ph)(3) and t-BuNH 2 were reacted at 140-150 degrees C, C6H5CMe3 was eliminated and the p roduct was [(H4C6)Me2CCH2]Ga[NH(t-Bu)](2)Ga(CH2CMe2Ph)(2), a gallium-( III) amide with one GaC4 metallocyclic ring, rather than [(PhMe2CCH2)( 2)GaNH(t-Bu)](2). X-ray structural studies confirmed the identity of t his novel compound as well as that of the typical dimer. When the reac tion temperature was increased to 210-230 degrees C, the product was [ (H4C6)Me2CCH2]Ga[NH(t-Bu)](2)Ga[CH2CMe2(C6H4)] a species with two GaC4 metallocyclic rings.