Synthesis and structure characterization of three-coordinate silver (I) and seven-coordinate cobalt (II) coordination polymers with 4-pyridylthioacetate

The synthesis and self-assembly of Silver (I) and Cobalt (II) with the 4-pyridylthioacetate (pyta) ligand leads to two new coordination polymers, Ag(pyta) (1) and [Co(pyta)2H2O] (2). 1 is a three-connected silver coordination polymer, which consists of a wave layer and regular rectangle cavities (5.54 £ 8.16 A ° ). While 2 is constructed by fascinating assembly of pyta ligands with a new structure of sevencoordinate cobalt ions. The two-dimensional layers structure is based on four kinds of chiral helices viewed from a and b directions. The crystallographic parameters are as follows: for 1, monoclinic, space group P21=c; with a ¼ 8:160ð2Þ A ° , b ¼ 10:109ð2Þ A ° , c ¼ 10:097ð2Þ A ° , b ¼ 104:938; and Z ¼ 4; for 2, monoclinic, space group C2=c; a ¼ 15:928ð3Þ A ° , b ¼ 6:3448ð12Þ A ° , c ¼ 15:582ð3Þ A ° , b ¼ 94:698ð3Þ8; and Z ¼ 8: q 2003 Elsevier B.V. All rights reserved.