Bicapped pentagonal antiprism

Many other linked polyhedra similar to molecular boranes are found for B-rich solid compounds of alkali and alkaline-earth metals. There are octahedra in Li2B6, octahedra and pentagonal bipyramids in Na3B2o, dodecahedra and bicapped square antiprisms in U3B14 and icosahedra in Na2B29. The cluster connection is particularly clear for compounds of this type. 

Figure 12 Closo polyhodra with n vortices tetrahedron (4), trigonal bipyramid (5), octahedron (6), pentagonal bipyramid (7), dodecahedron (8), tricapped trigonal prism (9), bicapped square antiprism (10), and icosahedron (12)...

A polynuclear anion [Nig(CO),2] reacts with a deficit of GeCl4 in acetonitrile to form [GeNi,2(CO)22] xs tetrachloride yields [GeNi,o(CO)2o] - These compounds represent the first examples of encapsulated Ge, which is contained in a pentagonal antiprism in the Ni species, and this is bicapped in the Ni,2 species. 

Beryllium, bis(t ifluo oacetylacetone)-gas chromatography, 560 Berzelius s conjugate theory, 4 Bicapped pentagonal prisms repulsion energy coefficients, 34 twelve-coordinate compounds, 100 Bicapped square antiprisms repulsion energy coefficients, 33,34 ten-eoordinate compounds, 98 1, r-Binaphthyl, 2,2 -bis(diphenylphosphino)-complexes... 

FIGURE 22.1. Dcitahcdra used by ca ie and duster inolcculcs. Tliey are the trigonal bipyra-inid, the octahedron, the pentagonal bipyramid, the dodecahedron, the tricapped trigonal prism, the bicapped Archimedean antiprism, the octadccahedron. and the icosahedron. 

Figure 3.2. Polyhredra of closo clusters (a) trigonal bipyramid (I>3h), (b) octahedron (O ), (c) pentagonal bipyramid (/>5h), (d) dodecahedron (i>2dX (e) tricapped trigonal prism (Z>3h), (0 bicapped Archimedean antiprism (g) octadecahedron (C2v), (h) icosahedron (7 ).

Figure 3.17 Nb clusters low-energy isomers, reprinted from [223]. They have been described as two different cappings of the octahedron for Nbg, a bicapped pentagonal bipyramid (left) and a tricapped octahedron (right) for Nb9, and a bicapped antiprism for Nbio...

Pentagonal antiprism Pentagonal prism Bicapped square prism... 

Hexagonal antiprism Bicapped pentagonal prism Anticuboctahedron... 

Fig. 2.27. Regular deltahedra often found in molecular structures of boranes and carboranes. (a) Tetrahedron (b) trigonal bipyramid (c) octahedron (d) pentagonal bipyramid (e) dodecahedron (f) tricapped trigonal prism (g) bicapped archimedean antiprism (h) octahedron (i) icosahedron...

Trigonal bipyramid Octahedron Pentagonal bipyramid Dodecahedron Tricapped trigonal prism Bicapped square antiprism Octadecahedron Icosahedron... 

FBP = pentagonal bipyramid CTP = C , monocapped trigonal prism CO = monocapped octahedron DD = dodecahedron SAP = square antiprism BTP = bicapped trigonal prism. 

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