873407-32-0Relevant articles and documents
Coordination polymers and networks constructed from bidentate ligands linked with sulfonamide and silver(I) ions
Katagiri, Kosuke,Ikeda, Takashi,Tominaga, Masahide,Masu, Hyuma,Azumaya, Isao
experimental part, p. 2291 - 2297 (2011/11/05)
Ligands that consist of pyridine rings linked by sulfonamide are simple and unique building blocks which form infinite polymers and networks via metal-coordination and hydrogen bonds (H-bonds). Single crystal X-ray analysis revealed that the complexation of bidentate ligands 1 and 2 bearing secondary sulfonamide with silver(I) ion results in the formation of [AgL 2(OTf)] (1a), [Ag2(μ-L)2(OTf)2] (2a), and [AgL(OTf)]n (2b) complexes. The complex 1a assembled into extended one-dimensional (1D) chains through H-bonds between the N-H moieties of sulfonamide and nitrogen atom of pyridyl groups. These individual chains associated into a three-dimensional (3D) network structure via C...O interactions between pyridyl protons and the oxygen atom of sulfonamides. The complex 2a assembled into two-dimensional (2D) sheets through H-bonds between the N-H moieties of sulfonamide and H2O molecules. In the complex 2b, enantiopure continuous 1D chain [AgL(OTf)]n was formed. In these structures, the silver(I) centers have a T-shaped stereochemistry in which each ion is coordinated by two pyridyl groups of the ligand and a trifluoromethane sulfonate anion. In the complex of ligands 3 and 4 with an ethyl group on the nitrogen atom of sulfonamide and silver(I) ions, continuous 1D homochiral chains [AgL(OTf)]n (3a) and helical polymers [AgL]n(OTf) n (4a) were formed. Both 1D homochiral polymers contained a racemic mixture of right-and left-handed coordination polymers, which assemble into 2D sheets and 3D networks via Ag...Ag, Ag...O, and C-H...O interactions.
