作者:Donald J. Cram、Takahiro Kaneda、Roger C. Helgeson、George M. Lein
DOI:10.1021/ja00516a048
日期:1979.10
A new series of ligands called spherands are similar to the crowns and cryptands. However, the cavity formed by the oxygen shell can be occupied only by spherical entities such as single atoms or monatomic ions. A cyclohexamato phenylene system provides a framework which holds the oxygen of 6 methoxyl groups in a perfect octahedral arrangement by their attachment to the six convergent positions of