12-crown-4, Lithium Ionophore V
|Density||1.089 g/mL at 25 deg C|
|Melting point||16 deg C|
|Boiling point||61-70 deg C/0.5 mm Hg|
|Flash point||113 °C (235 °F; 386 K)|
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
|what is: / ?)(|
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.
- Sigma-Aldrich Handbook of Fine Chemicals, 2007, page 768.