Silver(I) Saccharinato Complexes with Ethylenediamine andN,N-Dimethylethylenediamine - [Ag2(sac)2(en)(H2O)]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 [Ag2(sac)2(en)(H2O)]n complex, 1, is a coordination polymer in which[Ag(sac)2(H2O)]− and [Ag(en)2]+ ions are bridged by one of the sac ligands and Ag–Ag bonds [2.9920(3) A], resulting in [Ag2(sac)2(en)(H2O)] 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 AgN2O. 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 [Ag2(sac)2(en)2] 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 AgN3 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) A. The dimeric molecules of 2 are connected to one-dimensional hydrogen bonded chains by N–H···O hydrogen bonds.