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SiH8(CI)4 is Protactinium-like structured and crystallizes in the orthorhombic P2_12_12_1 space group. The structure is zero-dimensional and consists of eight tetrakis(iodomethyl)silane molecules.
SiH8(CBr)4 is Silicon tetrafluoride-derived structured and crystallizes in the tetragonal P-42_1c space group. The structure is zero-dimensional and consists of two tetrakis(bromomethyl)silane molecules. Si4+ is bonded in a tetrahedral geometry to four equivalent C2- atoms. All Si–C bond lengths are 1.89 Å. C2- is bonded to one Si4+, two H1+, and one Br1- atom to form distorted corner-sharing CSiH2Br tetrahedra. There is one shorter (1.09 Å) and one longer (1.10 Å) C–H bond length. The C–Br bond length is 1.97 Å. There are two inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one C2- atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one C2- atom. Br1- is bonded in a single-bond geometry to one C2- atom.
(NH4)2SiF6 is Silicon tetrafluoride-derived structured and crystallizes in the hexagonal P6_3mc space group. The structure is zero-dimensional and consists of four ammonium molecules and two SiF6 clusters. In each SiF6 cluster, Si4+ is bonded in an octahedral geometry to six F1- atoms. There is three shorter (1.72 Å) and three longer (1.73 Å) Si–F bond length. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a single-bond geometry to one Si4+ atom. In the second F1- site, F1- is bonded in a single-bond geometry to one Si4+ atom.
SiH4(H2)2 is Silicon tetrafluoride-like structured and crystallizes in the tetragonal I-4m2 space group. The structure is zero-dimensional and consists of four hydrogen molecules and two silane molecules.
SiH4(H2)2 is Silicon tetrafluoride-like structured and crystallizes in the orthorhombic Pmn2_1 space group. The structure is zero-dimensional and consists of four dihydrogen molecules and two silicon hydride molecules.