Supramolecular “Transmetalation” Leads to an Unusual Self‐Assembled P2L3 Cryptand

Out with the old, in with the new: Can the transmetalation of metal–organic supramolecular assemblies lead to new structure types? A series of Bi, Sb, and As-containing cryptands is reported that can be transmetalated to give a novel P2L3 cryptand (see scheme). The PS bonds behave reversibly, like traditional metal–ligand bonds, suggesting a possible new motif for dynamic covalent chemistry.