Ring-contracted Crown Ethers: 14-Crown-5, 17-Crown-6, and Their Sila-analogues. Drastic Decrease in Cation-binding Ability

Article abstract of DOI:10.1246/bcsj.57.887

As compared with symmetrical 3m-crown-m, the ring-contracted(3m-1)-crown-m showed drastic decrease in cation-binding ability, which is attributable not to the diminished cavity size but to the disordered conformation induced by ring contraction.