Silver(I) Saccharinato Complexes with Ethylenediamine and N,N-Dimethylethylenediamine - N and [Ag2(Sac)2(Dmen)2]

Abstract

Two new silver(I)-saccharinato (sac) complexes with ethylenediamine (en) and N,N-dimethylethylenediamine (dmen) were synthesized and characterized by elemental analysis, FT-IR spectroscopy, thermal analysis and single crystal X-ray diffraction. The [Ag<inf>2</inf>(sac)<inf>2</inf>(en)(H <inf>2</inf>O)]<inf>n</inf> complex, 1, is a coordination polymer in which[Ag(sac)<inf>2</inf>(H<inf>2</inf>O)]- and [Ag(en) <inf>2</inf>]+ ions are bridged by one of the sac ligands and Ag-Ag bonds [2.9920(3) Å], resulting in [Ag<inf>2</inf>(sac)<inf>2</inf>(en) (H<inf>2</inf>O)] building blocks which are also linked into one-dimensional helical chains by bridging en ligands. Each silver(I) atom is three-coordinate with a distorted T-shaped coordination of AgN<inf>2</inf>O. The individual chains of 1 are further stacked by π-π; interactions, OW-H⋯O and N-H⋯O hydrogen bonds to form a three-dimensional supramolecular framework. The [Ag<inf>2</inf>(sac)<inf>2</inf>(en)<inf>2</inf>] complex, 2, has two molecules in its asymmetric unit, and each dimer is formed by bridging of two monomeric [Ag(sac)(dmen)] units by Ag-Ag bonds. The silver(I) atoms exhibit a distorted T-shaped coordination of AgN<inf>3</inf> with an N-bonded sac and bidentate dmen ligands. The Ag⋯Ag separations in the pair of dimers are 3.2725(9) and 3.3127(9) Å. The dimeric molecules of 2 are connected to one-dimensional hydrogen bonded chains by N-H⋯O hydrogen bonds. © 2005 Wiley-VCH Verlag GmbH & Co. KGaA.