Two Novel Three‐Dimensional Lead(II) Coordination Polymers Involving 16‐Membered Rings: [Pb2(Bs‐glu)2(bipy)2] and [Pb2(Bs‐glu)2(phen)2

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AbstractThe reaction of Pb(CH3COO)2·3H2O with N‐benzesulfonyl‐L‐glutamic acid in the presence of 2, 2′‐bipyridine (bipy) or 1,10‐phenanthroline (phen) produced two novel complexes [Pb2(Bs‐glu)2(bipy)2] (1) and [Pb2(Bs‐glu)2(phen)2] (2) (Bs‐glu = N‐benzesulfonyl‐L‐glutamic acid dianion). In 1 chains bearing alternative 16‐membered rings and Pb2O3 nodes are constructed from the interactions of PbII ions with the carboxylates of Bs‐glu ligands. To the best of our knowledge, this is the first lead(II) complex of carboxylates with the formation of chains of Pb2O3. In 2 the 16‐membered ring units are connected by centrosymmetric Pb2O2 nodes to form chains. Complexes 1 and 2 construct the 3‐D supramolecular architectures through versatile hydrogen bonds and π‐π stacking interactions.