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12 Crown 4 Synthesis Essay

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. Its point group is S4. The dipole moment of 12-crown-4 varies in different solvent and under different temperature. Under 25 °C, the dipole moment of 12-crown-4 was determined as 2.33 ± 0.03 D in cyclohexane and 2.46 ± 0.01 D in benzene.[1]

References[edit]

  • Sigma-Aldrich Handbook of Fine Chemicals, 2007, page 768.
  • Sigma-Aldrich Cyclic tetramer of ethylene oxide which is specific for the lithium cation. 98%, 2018

See also[edit]

  • Crown ether
  • Cyclen, a similar molecule with N atoms (aza groups) instead of O atoms (ethers)
  1. ^Caswell, Lyman R.; Savannunt, Diana S. (January 1988). "Temperature and solvent effects on the experimental dipole moments of three crown ethers". Journal of Heterocyclic Chemistry. 25 (1): 73–79. doi:10.1002/jhet.5570250111. 

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