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Dec-5-yne 200.svg
Other names
  • Dibutylethyne
  • Dibutylacetylene
  • Dec-5-yne
  • 1,2-Dibutylacetylene
3D model (JSmol)
ECHA InfoCard 100.204.680
MeSH C028997
Molar mass 138.25 g·mol−1
Density 0.766 g/ml
Boiling point 177 °C (351 °F; 450 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

5-Decyne, also known as dibutylethyne, is a type of alkyne with a triple bond at its fifth carbon (the '5-' indicates the location of the triple bond in the chain). Its formula is C10H18. Its density at 25 °C and otherwise standard conditions is 0.766 g/ml.[1] The boiling point is 177 °C.[2] The average molar mass is 138.25 g/mol.

5-Decyne forms a group of symmetric alkynes with 4-octyne, 3-hexyne, and 2-butyne.

See also[edit]


  1. ^ Sigma-Aldrich Co., 5-Decyne. Retrieved on 16. August 2016.
  2. ^ David R. Lide (Hrsg.): CRC Handbook of Chemistry and Physics. 90. Auflage. (Internet-Version: 2010), CRC Press/Taylor and Francis, Boca Raton, Florida, Physical Constants of Organic Compounds, S. 3-136.