Augmented and diminished spherands and scales of binding
作者:Donald J. Cram、George M. Lein、Takahiro Kaneda、Roger C. Helgeson、Carolyn B. Knobler、Emily Maverick、Kenneth N. Trueblood
DOI:10.1021/ja00410a050
日期:1981.10
Host-guest complexation. 35. Spherands, the first completely preorganized ligand systems
作者:Donald J. Cram、Takahiro Kaneda、Roger C. Helgeson、S. Bruce Brown、Carolyn B. Knobler、Emily Maverick、Kenneth N. Trueblood
DOI:10.1021/ja00298a040
日期:1985.6
k2Cs2 = (~~~IU,/KSH+)~~C S~CH+C~,~~,+~,) Abstract: Spherands 1-5 and the related macrocycle 6 which are described in this paper are composed mainly of four to six aryloxy units attached to one another in such a way that the orbitals of the unshared electron pairs of their oxygens line an enforced cavity. These ligandsystems strongly complex only Li+ and Na+ ions and reject K', Ca2+, and Mg2+ ions