Dodecahedrane, and

Molecules such as P4 and the polyanionic clusters such as Si4- or As2- that are discussed in Section 13.2 are representatives of electron precise closo clusters. Organic cage molecules like tetrahedrane (C4R4), prismane (C6H6), cubane (C8H8), and dodecahedrane (C20H20) also belong to this kind of cluster. 

The other two possible chemically realizable species are tetrahedrane and dodecahedrane. [We do not consider here the (CH) polymer that corresponds to saturated infinite sheets of graphite.]... 

FIGURE 17. Three isomers of Si2oH20 having the [10]prismane, pagodane, and dodecahedrane structures. Reprinted with permission from References 10. Copyright 1995 American Chemical Society... 

The other two possible chemically realizable species are tetrahedrane and dodecahedrane. [We do not consider here the (CH) polymer that corresponds to saturated infinite sheets of graphite.] B. D. Kybett, S. Carroll, P. Natalis, D. W. Bonnell, J. L. Margrave and J. L. Franklin, J. Am. Chem. Soc., 88, 626 (1966). 

Olah, Prakash, and coworkers, in collaboration with Prinzbach, have studied pagodane, an undecacyclic hydrocarbon and dodecahedrane cage hydrocar-... 

The Platonic solids cubane CgHs [20,21] and dodecahedrane C20H20 [22] have been investigated by INS spectroscopy. The latter, see Fig. 8.6, provides an interesting example of the strengths and limitations of INS... 

Triquinacene 10 which is now reasonably well accessible by a six to seven step synthesis [1,2], has long been envisaged as the logical precursor to acepentalene 3 [43] (see Scheme lb). Woodward et al. developed the first synthesis for triquinacene 10 [43] and suggested that it should be a potential precursor to both the fully unsaturated tricycle acepentalene 3 and dodecahedrane 88 [ 1,44]. Although many attempts have been made to cyclodimerize triquinacene 10,... 

The relatively high basicity of cubane and dodecahedrane were ascribed primarily to bond strain and to polarizability effects, respectively. Santos, I. Balogh, D. W. Doecke, C. W. Marshall, A. G. Paquette, L. A. /. Am. Chem. Soc. 1986,108,8183. 

We needn t stop here. More rings can be attached in fused or bridged fashion to produce wondrously complex stmctures.The naming protocols are complicated, if ultimately logical, and won t be covered here. Many of the compounds have common names that are meant to be evocative of their shapes. Prismane and cubane are examples.The molecular versions of the Platonic solids, tetrahedrane, cubane, and dodecahedrane are all known, although the parent, unsubstituted tetrahedrane stih evades synthesis (Fig. 5.63). 

The abiotic evolution of container-type molecules may be traced from the original synthesis of cubane [94], pentaprismane [95], and dodecahedrane [96]. 

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