Carbon allotropes built from rings of two-coordinate atoms, known as cyclo [n] carbons, have
fascinated chemists for many years, but until now they could not be isolated or structurally …

Synthetic carbon allotropes such as graphene, carbon nanotubes and fullerenes have
revolutionized materials science and led to new technologies. Many hypothetical carbon …

Cyclo [18] carbon (C18, a molecular carbon allotrope) can be synthesized by
dehalogenation of a bromocyclocarbon precursor, C18Br6, in 64% yield, by atomic …

The viability of molecules with planar hexacoordinate carbon atoms is demonstrated by
density-functional theory (DFT) calculations for CB6 2–, a CB6H2 isomer, and three C3B4 …

The unambiguous structural characterization of a single-sized all-carbon molecule requires
its chemical synthesis. For cyclo [18] carbon, ab initio calculations predict a relatively stable …

Carboncones, a special family of all-carbon allotropes, are predicted to have unique
properties that distinguish them from fullerenes, carbon nanotubes, and graphenes. Owing …

Abstract Cyclo [n] carbons (cyclo‐Cn) are n‐membered monocyclic rings of sp‐hybridized C‐
atoms with unique electronic structures resulting from two perpendicular systems of …

Life on earth is based on compounds that have carbon frames and backbones. Today,
chemists have added to the world of biomolecules and biopolymers approximately 107 …

In organic chemistry, saturated carbon is known to bond to four ligands tetrahedrally, as first
recognized independently by JH van t Hoff and JA Le Bel in 1874. However, after the …

More than 50 years have passed since the first observation of graphitic cones in the
pyrolysis of carbon. However, to date there has been no report in the literature on the …