Synthesis of One- and Two-Dimensional Coordination Polymers Containing Organotin Macrocycles. Reactions of (n-Bu3Sn)2O with Pyridine Dicarboxylic Acids. Structure-Directing Role of the Ancillary 4,4′-Bipyridine Ligand

The reaction of (n-Bu3Sn)2O with pyridine-2,6-dicarboxylic acid (L1H2) in a 1:1 ratio resulted in the formation of a one-dimensional (1D) coordination polymer [(n-Bu3Sn)2(n-Bu2Sn)2(μ-L1)2(μ-OH)2]n (1). The formation of 1 is accompanied by a Sn–butyl bond cleavage reaction involving half of the organotin units. The formation of the 1D coordination polymer is facilitated by the multisite coordination capability of the dianionic ligand L1. The reaction of (n-Bu3Sn)2O with pyridine-2,5-dicarboxylic acid (L2H2) or pyridine-3,5-dicarboxylic acid (L3H2), on the other hand, results in the generation of the two-dimensional (2D) coordination polymers [(n-Bu3Sn)2(μ-L2)]n (2) and [(n-Bu3Sn)4(μ-L3)2]n (3), respectively. The formation of 2 and 3 emphasizes the importance of the relative orientation of the coordinating units in the multisite coordination ligand. Compounds 1–3 show a rich supramolecular architecture in their solid state as a result of multiple secondary interactions. Investigation of the fate of the reac...