Self-assembly of supramolecular coordination polymers constructed from AgCN and bipodal spacers

The syntheses and crystal structures of novel supramolecular coordination polymers (SCPs) of AgCN with bipodal ligands; 4,4'-bipyridine (bpy), trans- 1,2-bis(4-pyridyi)ethylene (tbpe) and 1,2-bis(4-pyridyl)ethane (bpe) are reported. The syntheses were affected in H2O/acetonitrile/NH3 media at room temperature. SCP [(AgCN)(2).bpy] (1) is monoclinic and crystallizes in the space group P2(1)/c, a=9.0565(4)angstrom, b=16.0063(8)angstrom, c=9.1361(4)angstrom, beta=110.51 degrees and Z=4. SCP [(AgCN)(3).(tbpe)(2).H2O] (2) is triclinic and crystallizes in the space group P (1) over bar, a=9.8427(4)angstrom, b=10.3596(4)angstrom, c=14.0864(6)angstrom, 1=98.873 degrees, beta = 101.7390 degrees, gamma= 95.506 degrees and Z = 2. SCP [(AgCN)(4) . bpe] (3) is monoclinic and crystallizes in the space group P2(1)/c, a 10.1872(5)angstrom, b = 9.1610(5)angstrom, c = 14.4862(6)angstrom, beta = 130.00(18)degrees and Z = 2. The 3D-topolgies of 1-3 resulted from the bridging action of the bipodal ligands and the argentophilic interactions as well as extensive H-bonding and pi-pi stacking. (C) 2009 Elsevier Ltd. All rights reserved.