Cyclo(6)carbon

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The correct title of this article is Cyclo[6]carbon. The substitution of any brackets is due to technical restrictions.
Cyclo(6)carbon
Names
Preferred IUPAC name
Hexadehydrobenzene
Identifiers
3D model (
JSmol
)
  • InChI=1S/C6/c1-2-4-6-5-3-1 ☒N
    Key: PXCDDPIOUAJVRE-UHFFFAOYSA-N ☒N
  • Alternating form: C1#CC#CC#C1
  • Cumulene form: C1=C=C=C=C=C=1
Properties
C6
Molar mass 72.066 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

Cyclo[6]carbon is an

molecular formula C6. The molecule is a ring of six carbon atoms, connected by alternating double bonds.[1] It is, therefore, a member of the cyclo[n]carbon
family.

There have been a few attempts to synthesize cyclo[6]carbon, e.g. by pyrolysis of mellitic anhydride,[2] but without success until 2023, when it was successfully synthesized by atom manipulation of hexachlorobenzene.[1]

Calculations suggest that the alternative

cyclic cumulene structure, called cyclohexahexaene, is the potential energy minimum of the cyclo[6]carbon framework.[3]

References

  1. ^
    doi:10.21203/rs.3.rs-3411973/v1
  2. doi:10.1021/jo01348a046
    .
  3. doi:10.1016/0166-1280(94)85015-1
    .
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