Ag (I)-organodiimine coordination complex polymers: Structural influences of ligand geometries and charge-compensating oxoanions

Hydrothermal synthesis has been exploited in the preparation of two new materials of the Ag(I)-organodiimine class of materials. By exploiting variations in ligand geometry and tether length and the structural influence of different oxoanions, the inorganic oxides [Ag(dpe)(NO₃)](dpe = 1,2-bias(4-pyridyl)ethane) and [Ag₂(2,4'-bpy)₂(SO₄)(H₂O)]·5H₂O(2·5H₂O) were isolated. Compound 1 was prepared in the reaction of Ag(NO₃), dpe, and H₂O in the mole ratio 1:1:500 at 120°C for 24 h, while compound 2 was prepared from Ag₂SO₄, 2,4'-bpy, and H₂O under similar conditions. The structure of 1 is constructed from {Ag(dpe)|(n)/(n+)⁺ chains linked through η², μ²-NO₃^- groups into a two-dimensional network. The structure of 2·5H₂O consists of one-dimensional sinusoidal chains. The Ag(I) sites exhibit two distinct geometries: one is 'T'-shaped through bonding to two nitrogen donors from two 2,4'-bpy groups and a sulfate oxygen; the second site is also 'T'-shaped through bonding to two pyridyl nitrogen atoms and an aqua ligand. (C) 2000 Editions scientifiques et medicales Elsevier SAS.