The syntheses of tris(trimethylsilyl)silyl (hypersilyl) and halide substituted dialanes Al2X2{Si(SiMe3)(3)}(2) .. 2THF (X = Cl, Br) are presented. The results of the X-ray diffraction experiments are presented and discussed in comparison to the Al-III compounds AlBr2Si(SiMe3)(3) . THF and AlBr3 . OPh2.