Cyclobutadiene

Cyclobutadiene
Cyclobutadiene
Cyclobutadiene
Space-filling model.
Names
Preferred IUPAC name
Cyclobuta-1,3-diene
Other names
1,3-Cyclobutadiene
Cyclobutadiene
[4]Annulene
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
UNII
  • InChI=1S/C4H4/c1-2-4-3-1/h1-4H checkY
    Key: HWEQKSVYKBUIIK-UHFFFAOYSA-N checkY
  • InChI=1/C4H4/c1-2-4-3-1/h1-4H
    Key: HWEQKSVYKBUIIK-UHFFFAOYAI
  • C1=CC=C1
Properties
C4H4
Molar mass 52.076 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
checkY verify (what is checkY☒N ?)

Cyclobutadiene is an organic compound with the formula C4H4. It is very reactive owing to its tendency to dimerize. Although the parent compound has not been isolated, some substituted derivatives are robust and a single molecule of cyclobutadiene is quite stable. Since the compound degrades by a bimolecular process, the species can be observed by matrix isolation techniques at temperatures below 35 K. It is thought to adopt a rectangular structure.[1][2]

  1. ^ Cite error: The named reference Kollmer was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference Cram2003 was invoked but never defined (see the help page).