Prisms capping

Tricapped trigonal prism Capped square antiprism [NH4]3[ThF7], LiUFj, Th(tta)4 topo Li3ThF7, Th(tfa)4 -2H20, [C(NH2)3]5[Th(C03)3F3]... 

There are also some discrete Zintl anions that obey more complex valence rules such as Infj-, where the structure is that of a trigonal prism capped on all five faces and there is an extra electron which is probably expelled into a conduction band.24 Other examples are provided by ions such as Snj-, which can be obtained by reduction of Sn2+ in liquid ammonia containing dissolved sodium. 

Capped octahedron — Capped trigonal prism Capped octahedron — Pentagonal bipyramid... 

Figure 2.6.12 The Ni-centered and Ni(CO)-capped cluster [Ni (Sn Ni-CO)P, where the open pseudosquare face of the cluster is capped, as in capped empty clusters (Figures 2.6.5 and 2.6.8). This is the only centered and capped cluster with this geometry, all others have the triangular base of the tricapped trigonal prism capped, as in Figure 2.6.10...

Crystallized from ammonium sulfate. Rapidly grown crystals are usually twelve-sided figure , bui when grown slowly in the cold, they often appear i tetragonal prisms capped by pyramids of the same order. St e also Amylase. 

Nine Vertices. Cages and polyhedra with nine vertices are known but are not numerous. Representatives are the Big+ ion which occurs in Bi24Cl26, and the B9H9 and B7C2H9 species in all three the structure is that of a trigonal prism capped on its rectangular faces (Fig. 1-11), the most common geometry also for 9-coordinate complexes. 

Tricapped trigonai prism — Capped square antiprism 12... 

Reaction 6 is formally identical for cobalt and rhodium, however, in the cobalt case the octahedral cluster [Co6N(CO)i3] is produced first (according to Eq. (5)) and then the condensation step occurs. The two compounds, which share the same metal skeleton (a trigonal prism capped on a square face), have also a different ligand disposition which yields an idealized C2 symmetry in the cobalt case and for the rhodium compound. 

The prism caps of Pb coordination prisms are fairly well commensurable with the dimensions of square pyramids of As, Sb and Bi, the latter (or the groups BSg) are in turn commensurable with the coordination octahedra around Pb, Mn, In, Fe, Ag, (Hg), etc., or with tetrahedral and trigonal coordinations of primarily Ag and Cu. The latter may fill interspaces in the above arrays or form polyhedral arrangements of their own, with only subdued amounts of prismatic, pyramidal or octahedral cations present. 

Figure 33.5 The [TaF P polyhedron. The triangles F2/F2i/F4ii and F3/F4/F4I form the bases of a distorted trigonal prism capped by atom F2ii. (Symmetry codes (I) -y+1, x-y, z (ii) -x+y+1, -x+1, z.) A polyhedral representation of the structure as viewed along the c axis. (The smaller polyhedra are lTaFyf while the larger octahedraare [FK ]). a-K2TaFyKF (G mc) - hexagonal, a = 8.2533(4) A, c = 6.3196(4) A, V=372.79A andZ= 2...

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