12-Crown-4

12-Crown-4
IUPAC name 1,4,7,10-tetraoxacyclododecane
Other names 12-crown-4, Lithium Ionophore V
Identifiers
CAS number	294-93-9 Y
ChemSpider	8912 Y
ChEBI	CHEBI:32399 Y
Jmol-3D images	Image 1 Image 2
SMILES O1CCOCCOCCOCC1 C1COCCOCCOCCO1
InChI InChI=1S/C8H16O4/c1-2-10-5-6-12-8-7-11-4-3-9-1/h1-8H2 Y Key: XQQZRZQVBFHBHL-UHFFFAOYSA-N Y InChI=1/C8H16O4/c1-2-10-5-6-12-8-7-11-4-3-9-1/h1-8H2 Key: XQQZRZQVBFHBHL-UHFFFAOYAA
Properties
Molecular formula	C8H16O4
Molar mass	176.21
Density	1.089 g/mL at 25 deg C
Melting point	16 deg C
Boiling point	61-70 deg C/0.5 mm Hg
Hazards
Flash point	113 deg C
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

12-crown-4, also called 1,4,7,10-tetraoxacyclododecane and Lithium Ionophore V, is a crown ether with the formula C₈H₁₆O₄. It is a cyclic tetramer of ethylene oxide which is specific for the lithium cation:

References

• Sigma-Aldrich Handbook of Fine Chemicals, 2007, page 768.

See also

• Crown ether
• Cyclen, a similar molecule with N atoms (aza groups) instead of O atoms (ethers)