Abstract
Two novel mixed-ligand zinc(II) complex compounds [Zn(cinn)2(mpcm)]n (1) and [Zn(p-HO-cinn)2(nia)(H2O)2]·H2O (2) (cinn=cinnamato, mpcm=methyl-3-pyridylcarbamate, nia=nicotinamide) were prepared and characterized by elemental analysis, infrared spectroscopy, single crystal X-ray diffraction and thermal analysis. Diverse modes of carboxylate coordination were found in the complexes. In 1 the cinnamate ligands coordinate as monodentate and bridging (syn–anti), respectively. The syn–anti carboxylate bridges connect the molecules of 1 to infinite polymeric helical chains. The structure of 2 is monomeric. One of the carboxylate oxygens of p-hydroxycinnamate is semi-coordinated (Zn–O=2.549(2)Å).
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