Ra. Sachleben et al., Dideoxygenated calix[4]arene crown-6 ethers enhanced selectivity for caesium over potassium and rubidium, CHEM COMMUN, (17), 1999, pp. 1751-1752
Calix[4]arene crown-6 ethers derived from dideoxygenated calix[4]arene exhi
bit enhanced extraction selectivity for caesium over potassium; the crystal
stucture of the uncomplexed calix[4]arene monobenzocrown-6 ether exists in
the 1,3-alt conformation in the solid state.