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)}nn+ 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.