Two members of a new type of bridged macrocyclic polyether having carbon bridgeheads have been synthesised by bridging the hydroxy groups of cis-dihydroxydibenzo-14-crown-4 (3a) with 3,6-dioxaoctane-1,8-diyl and 3,6,9-trioxaundecane-1,11-diyl links. These ligands show high complexing ability in water with sodium, potassium, and rubidium salts.
D. G. Parsons, J. Chem. Soc., Perkin Trans. 1, 1978, 451 DOI: 10.1039/P19780000451
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