Interplay of Pyridine Substitution and Ag(I)···Ag(I) and Ag(I)···π Interactions in Templating Photochemical Solid State [2 + 2] Reactions of Unsymmetrical Olefins Containing Amides: Single-Crystal-to-Single-Crystal Transformations of Coordination Polymers

The unsymmetrical bispyridyl olefins containing amides (UBOs) have been synthesized to study solid state [2 + 2] photochemical reactions with or without template. The crystal structures of UBOs were determined using a powder Xray diffraction technique. The pure organic materials of UBOs were found to form head-to-head (HH)-dimers upon irradiation in accordance with their crystal structures. Further, Ag Ag and Ag g interactions were shown to template head-to-tail (HT) photodimerization of UBOs in their one-dimensional-coordination polymers in single-crystal-to-single crystal manner. The dimer structures were determined by single crystal X-ray and H-1 NMR techniques.