The use of 2,1,3-benzoselenadiazole as an auxiliary ligand for the construction of new 2D silver(I)/benzene- or cyclohexane-1,3,5-tricarboxylate honeycomb networks

The reaction of freshly synthesized [Ag(NH3)(2)](OH), 2,1,3-benzoselenadiazole (bsd) and benzene- or cyclohexane-1,3,5-tricarboxylic acid (H(3)btc/H(3)ctc) results in two new coordination polymers containing 2D Ag-3(btc) and Ag-3(ctc) hexagonal motifs, namely [Ag-3(btc)(bsd)(6)]center dot 0.5H(2)O (1) and [Ag-3(ctc)(bsd)(3)]center dot 1.5bsd center dot 3.5H(2)O (2). Complex 1 is a 3D supramolecular framework extended by deformed 2D Ag-3(btc) honeycomb nets via Se center dot center dot center dot N synthons formed between the dangling monodentate bsd groups, whereas 2 is a 3D metal-organic framework of nanoscale cages made up from ideal Ag-3(ctc) honeycomb layers and mu(2)-bridging bsd ligands. ((c) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008).