Summary A general strategy for the synthesis of spherical macrotricyclic ligands has been developed. Four spherical cryptands, SC-24, SC-25. SC-26 and SC-27 have been obtained by this route. The synthesis and cation-complexing properties of these compounds are described in detail. Stability constants and cation exchange rates of the spherical cryptates obtained with alkali and alkaline-earth cations have been determined. Highly stable ...
![hexaoxa-4,10,16,22,27,32-tetraaza-1,7,13,19-tricyclo[11.11.5.57,19]tetratriacontanedione-2,6 Structure](https://image.chemsrc.com/caspic/360/78666-41-8.png)
![4,10,16,22,27,32-hexaoxa-1,7,13,19-tetraazatricyclo[11.11.5.57,19]tetratriacontane Structure](https://image.chemsrc.com/caspic/265/56698-26-1.png)