21-Crown-7

21-Crown-7
Names
	IUPAC name 1,4,7,10,13,16,19-heptaoxacycloheneicosane
Identifiers
CAS Number	33089-36-0 ;
3D model (JSmol)	Interactive image;
ChemSpider	84104 ;
ECHA InfoCard	100.046.689
EC Number	251-373-3;
PubChem CID	93160;
CompTox Dashboard (EPA)	DTXSID50186747 ;
	InChI InChI=1S/C14H28O7/c1-2-16-5-6-18-9-10-20-13-14-21-12-11-19-8-7-17-4-3-15-1/h1-14H2 Key: XKEHLMZHBXCJGZ-UHFFFAOYSA-N ; InChI=1S/C14H28O7/c1-2-16-5-6-18-9-10-20-13-14-21-12-11-19-8-7-17-4-3-15-1/h1-14H2 Key: XKEHLMZHBXCJGZ-UHFFFAOYSA-N;
	SMILES O1CCOCCOCCOCCOCCOCCOCC1;
Properties
Chemical formula	C14H28O7
Molar mass	308.371 g·mol−1
Related compounds
Related compounds	Dibenzo-21-crown-7
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
	Infobox references

21-Crown-7 is an organic compound with the formula [C₂H₄O]₇ and the IUPAC name of 1,4,7,10,13,16,19-heptaoxacycloheneicosane. Like other crown ethers, 21-crown-7 functions as a ligand for some metal cations with a particular affinity for caesium cations.[1] The point group of 21-crown-7 is S₇. The dipole moment of 21-crown-7 varies in different solvents and under different temperatures.

References

Frensdorff, Hans K. (1 February 1971). "Stability constants of cyclic polyether complexes with univalent cations". Journal of the American Chemical Society. 93 (3): 600–606. doi:10.1021/ja00732a007.

External links

ChemicalBook

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[1] Frensdorff, Hans K. (1 February 1971). "Stability constants of cyclic polyether complexes with univalent cations". Journal of the American Chemical Society. 93 (3): 600–606. doi:10.1021/ja00732a007.