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21-Crown-7

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21-Crown-7
Skeletal formula
Skeletal formula
Names
Preferred IUPAC name 1,4,7,10,13,16,19-Heptaoxacyclohenicosane
Identifiers
CAS Number
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.046.689 Edit this at Wikidata
EC Number
  • 251-373-3
PubChem CID
UNII
CompTox Dashboard (EPA)
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/h1-14H2Key: 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/h1-14H2Key: XKEHLMZHBXCJGZ-UHFFFAOYSA-N
SMILES
  • O1CCOCCOCCOCCOCCOCCOCC1
Properties
Chemical formula C14H28O7
Molar mass 308.371 g·mol
Related compounds
Related compounds Dibenzo-21-crown-7
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references
Chemical compound

21-Crown-7 is an organic compound with the formula 7 and the IUPAC name 1,4,7,10,13,16,19-heptaoxacycloheneicosane. Similar to other crown ethers, 21-crown-7 functions as a ligand for certain metal cations, with a specific affinity for caesium cations. The dipole moment of 21-crown-7 varies depending on the solvent and temperatures.

References

  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.

External links


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