Syntheses and structures of six chain-, ladder- and grid-like co-ordination polymers constructed from μ-hexamethylenetetramine and silver salts

Six interesting co-ordination polymers [Ag(mu -hmt)(hba)(H2O)] 1, [Ag(mu -hmt)(aba)(H2O)] 2, [Ag-2(mu -hmt)(2)(bca)(H2O)(2)].H2O 3, [Ag(mu -hmt)(ina)].0.5H(2)O 4, [Ag(mu -hmt)(bsa)] 5, [Ag-2(mu -hmt)(2)(bda)]. 4H(2)O 6 (hmt=hexamethylenetetramine, hba=4-hydroxybenzoate, aba=4-aminobenzoate, bca=4,4'-biphenyldicarboxylate, ina=isonicotinate, bsa=benzenesulfinate, bda=1,4-butanedioate), have been prepared and structurally characterised. These co-ordination frameworks, all based on the Ag(mu -hmt) chains, exhibit new structural varieties in the Ag-hmt system, such as the chains in 1 and 2, ladders in 3, grids in 4, double-chains in 5, as well as rectangular grids with double-chains in 6. The result shows that the structural variations are mainly dependent upon the nature of the anionic ligands used.