Zwitterionic Guanidinium Compounds Serve as Electroneutral Anion Hosts
作者:Michael Berger、Franz P. Schmidtchen
DOI:10.1021/ja992028k
日期:1999.11.1
site suitable for strong interaction with negatively charged guests. An anionic moiety balancing the overall host charge to zero is incorporated in a way to prevent collapsing into an ion pair. Using bicyclic guanidinium anchor groups for direct guest binding and a closo-borane cluster as an anionic countercharge the ditopic zwitterionic host 17 was designed and prepared in a convergent synthetic scheme