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Tricarbon or C3 is a small carbon cluster first spectroscopically observed in the beginning 20th century in the tail of a comet by William Huggins and subsequently identified in stellar atmospheres. Tricarbon can be found in interstellar space and can be produced in the laboratory by a process called laser ablation. Small carbon clusters like tricarbon and dicarbon are regarded as soot precursors and are implicated in the formation of certain industrial diamonds and in the formation of fullerenes. The ground state molecular geometry of tricarbon has been identified as linear via its characteristic symmetric and antisymmetric stretching and bending vibrational modes and bears bond lengths of 129 to 130 picometer corresponding to those of alkenes. The ionization potential is determined experimentally at 11 to 13.5 electron volt . In contrast to the linear tricarbon molecule the C3+ cation is bent.
C3 has also been identified as a transient species in various combustion reactions.
The generation of C3 was investigated by Professor Emeritus Philip S. Skell of Pennsylvania State University in the 1960s.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Tricarbon". A list of authors is available in Wikipedia.|