5-Decyne

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

Names
Preferred IUPAC name Dec-5-yne
Other names Dibutylethyne Dibutylacetylene Dec-5-yne 1,2-Dibutylacetylene
Identifiers
CAS Number	1942-46-7 Y
3D model (JSmol)	Interactive image
ChemSpider	15222
ECHA InfoCard	100.204.680
MeSH	C028997
PubChem CID	16030
UNII	88G1AII0AH Y
CompTox Dashboard (EPA)	DTXSID70173038
InChI InChI=1S/C10H18/c1-3-5-7-9-10-8-6-4-2/h3-8H2,1-2H3 Key: JWBQJUFCNOLNNC-UHFFFAOYSA-N
SMILES CCCCC#CCCCC
Properties
Chemical formula	C10H18
Molar mass	138.254 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 forms a group of symmetric alkynes with 4-octyne, 3-hexyne, and 2-butyne.

See also

• 1-Decyne