Cyclopropyne

Cyclopropyne is an extremely strained, unstable, and reactive cycloalkyne with the chemical formula C₃H₂.^[1][2] As the smallest cycloalkyne, it features a three-carbon ring that includes a triple bond. The significant ring strain makes the compound challenging to produce and causes its high reactivity.^[3]

Cyclopropyne

Names
Preferred IUPAC name Cyclopropyne
Identifiers
CAS Number	60701-63-5 Y
3D model (JSmol)	Interactive image
PubChem CID	18366129
CompTox Dashboard (EPA)	DTXSID90593158
InChI InChI=1S/C3H2/c1-2-3-1/h1H2 Y Key: WWVWWECUZUPLCL-UHFFFAOYSA-N Y
SMILES C1C#C1
Properties
Chemical formula	C3H2
Molar mass	38.049 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Theoretical studies

Although cyclopropyne is challenging to isolate, it has been extensively investigated through theoretical studies aimed at exploring its electronic structure, energy properties, and vibrational characteristics. A similar compound called silacyclopropyne, in which a silicon atom substitutes one of the carbon atoms in the ring, has been successfully synthesized and examined.^[4][5]

See also

• Cyclopropene
• Cyclopropane