Gallium−Nitrogen Compounds Prepared By Dihydronaphthalene and Thermal Elimination Reactions. Crystal and Molecular Structures of [(PhMe2CCH2)2GaNH(t-Bu)]2 and [(H4C6)Me2CCH2]Ga[NH(t-Bu)]2Ga(CH2CMe2Ph)2

The dihydronaphthalene elimination reaction between Na2[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-BuNH2 were reacted at 140−150 °C, C6H5CMe3 was eliminated and the product was a gallium(III) amide with one GaC4 metallocyclic ring, rather than [(PhMe2CCH2)2GaNH(t-Bu)]2. X-ray structural studies confirmed the identity of this novel compound as well as that of the typical dimer. When the reaction temperature was increased to 210−230 °C, the product was a species with two GaC4 metallocyclic rings.