Dioxadiazadecalin/Salen Tautomeric Macrocycles and Complexes: Prototypal Dynamic Combinatorial Virtual Libraries New Supramolecular Host Systems, Part 12. Part 11: ref. 1. We gratefully acknowledge support by a research grant from the Israel Science Foundation and by an Intel Scholarship (to A.S.), as well as the valuable assistance of Shimon Hauptman with mass spectrometry and Yuri Paskover as an undergraduate research student.