Lithium amidohydridoaluminates

The amidohydridometalates [Li(THF)(4)][HAl(NPh2)(3)] (1), [Li(DME)(3)][HAl{ N(CH2Ph)(2)}(3)] (2), and [{(THF)(3)Li}-{H2Al(N(c)Hex(2))(2)}].0.5toluene ( 3.0.5toluene; (c)Hex = C6H11) have been prepared by reaction of the corresp onding amines with LiAlH4 in THF. For 2 recrystallization from DME is requi red to obtain crystals, suitable for X-ray diffraction. The new compounds h ave been characterized by elemental analyses, IR, NMR, and MS techniques, a nd X-ray structure analyses. According to this the anions of 1, 2, and 3 0. 5toluene possess distorted tetrahedral coordination spheres. In 3.0.5toluen e a Li . . .H contact of 184(4) pm was detected to complete the tetrahedral coordination of the Li+ center.