Assembly via H-bonds and Ag-Ag attractions of one-dimensional silver(I) complexes of nicotinamide and nicotinic acid with sulfonate counter-anions

作者：Chen, CH; Cai, JW^*; Feng, XL; Chen, XM

来源：Polyhedron, 2002, 21(7): 689-695.

DOI：10.1016/S0277-5387(02)00851-3

• silver(I)
• nicotinamide
• nicotinic acid
• sulfonate
• hydrogen bond
• Ag-Ag interaction
• assembly chemistry

Three silver(I) complexes containing pyridine derivatives have been synthesized and structurally characterized by X-ray single crystal diffraction, in order to evaluate the effect of counter anions upon the assembly process of complex cations via intermolecular hydrogen bonds. [Ag(nia)(2)](2)(bpds).2H(2)O (1) and [Ag(nia)(2)](asa) (2) (nia=nicotinamide, bpds=4,4'-biphenyldisulfonate, asa=aminosulfonate) contain cationic complexes comprised of two nicotinamide ligands coordinated with the pyridine nitrogen atoms to a silver(I) ion in a linear fashion. The linear unit is connected to another one by a weak Ag-Ag interaction leading to an H-shaped dimeric unit. The dimeric units are linked through hydrogen bonds formed between amide groups in a head-to-head mode, creating one-dimensional cationic ribbons. In 1, the ribbons are extended into two-dimensional network via hydrogen bonds formed by the amide groups. The cationic complex cations in [Ag(niac)(2)](2)(1,5nds).2H(2)O (3) (niac=nicotinic acid, 1,5nds=1,5-disulfonate) are also connected to each other through Ag-Ag interactions, leading to H-shaped dimeric units. The dimeric units are propagated via C-H...O hydrogen bonds between the aromatic hydrogen atom and the carbonyl oxygen. A database search shows that the unique Ag-Ag interaction between the discrete silver(I) coordinated linearly just by two pyridine nitrogen atoms is only observed in salts containing sulfonate or sulfate as counter anions.

• 出版日期2002-4-1
• 单位中山大学