S‐Shaped Binuclear Cation Complex of a Linear Polyether:1,5‐Bis{2‐[5‐(2‐nitrophenoxy)‐3‐oxapentyloxy]‐phenoxy}‐3‐oxapentane·2KSCN

Complexs of very long polythers and alkali metal salts can be predicted to have two types of structures: 1) the polyether could wrap spherically around the cation and thus shield it from the anion, and 2) the polyether could adopt an S‐shaped arrangement with each loop coordinating a cation, which is still bound to an anion for geometric reasons. These two types have been accomplished in (1) (cation: Rb + ) and (2) (salt: 2KSCN).