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The Schlegel diagram of a closed fullerene is a graph that is planar and 3-regular ... If the structure of the fullerene does not allow such numbering, another ...
Fullerene chemistry is a field of organic chemistry devoted to the chemical properties of fullerenes. [1] [2] [3] Research in this field is driven by the need to functionalize fullerenes and tune their properties. For example, fullerene is notoriously insoluble and adding a suitable group can enhance solubility. [1]
Its average bond length is 0.14 nm. Each carbon atom in the structure is bonded covalently with 3 others. [30] A carbon atom in the C 60 can be substituted by a nitrogen or boron atom yielding a C 59 N or C 59 B respectively. [31] Energy level diagram for C 60 under "ideal" spherical (left) and "real" icosahedral symmetry (right).
C 70 fullerene is the fullerene molecule consisting of 70 carbon atoms. It is a cage-like fused-ring structure which resembles a rugby ball, made of 25 hexagons and 12 pentagons, with a carbon atom at the vertices of each polygon and a bond along each polygon edge.
Endohedral fullerenes, also called endofullerenes, are fullerenes that have additional atoms, ions, or clusters enclosed within their inner spheres. The first lanthanum C 60 complex called La@C 60 was synthesized in 1985. [ 2 ]
But a paper in 1988 claimed that a better theory was that the structure was the same as that of an allotrope of silicon called Si-III or γ-silicon, the so-called BC8 structure with space group Ia 3 and 8 atoms per primitive unit cell (16 atoms per conventional unit cell).
The only two smaller fullerenes are the graph of the regular dodecahedron (a fullerene with 20 vertices) and the graph of the truncated hexagonal trapezohedron (a 24-vertex fullerene), [3] which are the two types of cells in the Weaire–Phelan structure. The 26-fullerene graph has many perfect matchings. One must remove at least five edges ...
Polyfullerene is a basic polymer of the C 60 monomer group, in which fullerene segments are connected via covalent bonds into a polymeric chain without side or bridging groups. They are called intrinsic polymeric fullerenes, or more often all C 60 polymers. Fullerene can be part of a polymer chain in many different ways.