9-Crown-3

9-Crown-3, also called 1,4,7-trioxonane or 1,4,7-trioxacyclononane is a crown ether with the formula C₆H₁₂O₃. It is a cyclic trimer of ethylene oxide which is specific for the lithium cation.

9-Crown-3

Names
Preferred IUPAC name 1,4,7-Trioxonane
Other names 1,4,7-Trioxacyclononane; Ethylene oxide trimer
Identifiers
CAS Number	27725-91-3
3D model (JSmol)	Interactive image
Beilstein Reference	1421638
ChEBI	CHEBI:32400
ChemSpider	480221
PubChem CID	552016
CompTox Dashboard (EPA)	DTXSID70338923
InChI InChI=1S/C6H12O3/c1-2-8-5-6-9-4-3-7-1/h1-6H2 Key: RCIDBLLMZGGECJ-UHFFFAOYSA-N
SMILES C1COCCOCCO1
Properties
Chemical formula	C6H12O3
Molar mass	132.159 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