21-Crown-7
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.
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Names | |
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IUPAC name
1,4,7,10,13,16,19-heptaoxacycloheneicosane | |
Identifiers | |
3D model (JSmol) |
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ChemSpider | |
ECHA InfoCard | 100.046.689 |
EC Number |
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PubChem CID |
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CompTox Dashboard (EPA) |
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Properties | |
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 | |
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.
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