REACTIONS OF THE ALKYLTRIHYDROALUMINATE [LI(THF)(2)(ALH3[C(SIME3)(3)])](2) - CRYSTAL-STRUCTURES OF [LI(TMEN)(2)][ALH3(C(SIME3)(3))], [ALBR2-(C(SIME3)(3))]CENTER-DOT-THF, [ALI2(C(SIME3)(3))]CENTER-DOT-THF, [LI(THF)(2)(MU-NHPH)(2)-(ALH[C(SIME3)(3)])] AND (LI(THF)(4)][AL(NHPH)(3)(C(SIME3)(3))]

The alkyltrihydroaluminate [Li(thf)(2){AlH3[C(SiMe3)(3)]}](2), (thf = tetrahydrofuran) reacted (i) with tetramethylethane-1,2-diamine (tmen) to give [Li(tmen)(2)][AlH3{C(SiMe3)(3)}], which crystallises as solve nt-separated ion pairs, (ii) with HCl, HBr or Br-2, or I-2 to give, re spectively, the alkylaluminium dihalides [AlX2{C(SiMe3)(3)}].thf, X = Cl, Br or I, which have been characterised spectroscopically and, when X = Br or I, by X-ray diffraction studies; and (iii) with aniline to give [Li(thf)(2)(mu-NHPh)(2)(AlH[C(SiMe3)(3)]}] and [Li(thf)(4)][Al(NH Ph)(3){C(SiMe3)(3))], which crystallise as anilide-bridged and solvent -separated ion pairs respectively.