A Chiral Coordination Polymer of Silver(I) With Saccharinate and Pyridine: Synthesis, Spectral, Thermal, and Structural Characterization of [Ag(sac)(py)]n

Abstract

The first silver(I) complex of saccharinate (sac) with pyridine (py), [Ag(sac)(py)]<inf>n</inf> has been synthesized and characterized by elemental analysis, IR spectroscopy and single crystal X-ray diffractometry. The complex crystallizes in chiral, trigonal space group P3<inf>1</inf>21 (No. 152) with unit cell parameters of a = 11.2605(2) Å, c = 17.3300(4) Å, V = 1903.02(6) Å3 and Z = 6. [Ag(sac)(py)]<inf>n</inf> contains monomeric [Ag(sac)(py)] units linked into infinite helices by way of Ag⋯Ag interactions [d(Ag⋯Ag) = 2.909(2) and 2.985(1) Å]. The distorted square-planar environment of Ag is completed by an N-bonded sac [Ag-N = 2.084(2) Å] and a py molecule [Ag-N = 2.116(2) Å]. The N <inf>sac</inf>-Ag-N<inf>py</inf> angle is 173.85(10)°. The one-dimensional chains are crosslinked by C-H⋯O interactions involving the carbonyl and sulfonyl O atoms of sac and aromatic-ring hydrogen atoms of both sac and py. The thermal stability of the title complex was investigated using thermogravimetry and differential thermal analysis in a static atmosphere of air. The first decomposition stage between 90 and 160°C corresponds to removal of the py molecule in a single stage, while the degradation of the sac moiety occurs at two stages in the temperature range 370-515°C, giving an end product of metallic Ag. © 2005 Springer Science+Business Media, Inc.