Abstract
A new coordination polymer namely [[Ca6(H–gly)12(H2O)18]Cl12·6H2O]n (1) (H–gly = glycine) has been isolated from the calcium chloride–glycine–water system and structurally characterized. Each Ca(II) in 1 is eight-coordinated and is bonded to eight oxygen atoms three of which are from terminal water molecules and five oxygen atoms from four symmetry related zwitterionic glycine ligands. The H–gly ligands exhibit two different binding modes viz. a monodentate carboxylate ligation and a μ3-tetradentate bridging carboxylate binding mode, which results in the formation of a one-dimensional coordination polymer. In the infinite chain the Ca(II) atoms are organized in a zigzag fashion. A comparative study reveals a rich and diverse structural chemistry of calcium halide–glycine compounds. The synthesis and structural characterization of a new coordination polymer namely [[Ca6(H–gly)12(H2O)18]Cl12·6H2O]n (1) (H-gly = glycine) isolated from the calcium chloride–glycine–water system is reported.
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