Kinetically stable complexes of alkali cations with calixspherands: an evaluation of shielding
作者:Wouter I. Iwema Bakker、Marijke Haas、Corinne Khoo-Beattie、Ryszard Ostaszewski、Sybille M. Franken、Herman J. den Hertog、Willem Verboom、Dick de Zeeuw、Sybolt Harkema、David N. Reinhoudt
DOI:10.1021/ja00080a015
日期:1994.1
and X-ray crystallography showed that all the complexes are in a partial cone conformation. All the calixspherands form kinetically stablecomplexes with Na+, K+, and Rb+. The kinetic stability was determined both by H-1 NMR spectroscopy, in CDCl3 saturated with D2O, and by a new method based on the exchange of radioactive rubidium or sodium in the complexes for nonradioactive sodium in different solvents