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Is it possible to achieve molecules with starlike structures by replacing the H atoms in (CH)nq aromatic hydrocarbons with aluminum atoms in bridging positions? Although D4h C4Al42− and D2 C6Al6 are not good prospects for experimental realization, a very extensive computational survey of fifty C5Al5− isomers identified the starlike D5h global minimum with five planar tetracoordinate carbon atoms to...
Using density functional calculations, we demonstrate that the planarity of the nonclassical planar tetracoordinate carbon (ptC) arrangement can be utilized to construct new families of flat, tubular, and cage molecules which are geometrically akin to graphenes, carbon nanotubes, and fullerenes but have fundamentally different chemical bonds. These molecules are assembled with a single type of hexagonal...
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