| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1402062 | Journal of Molecular Structure | 2015 | 8 Pages |
•Flexible ligands have a significant influence in the final structures of the complexes.•CH⋯Cl hydrogen bonds extend the discrete molecules into a non-covalent bond polymers.•The complexes have been characterized by X-ray diffraction, elemental and infrared spectroscopy.
Four new complexes of [Hg2Cl4(bpp)]n (1), [Hg2Cl4(tdmpp)] (2), [Cd2I4(tdmpp)] (3) and [Fe2Cl4(tdmpp)] (4) were prepared by using the neutral N-donor ligands 1,3-bis(3,5-dimethyl-1-pyrazolyl)propane (bpp) and 1,1,3,3-tetrakis(3,5-dimethyl-1-pyrazolyl)propane (tdmpp) with different flexibility and appropriate metal salts of Cd(II), Hg(II) and Fe(II) ions. These compounds were characterized by the infrared spectroscopy, elemental analysis and X-ray crystallography. Flexible ligands and non-covalent CH⋯Cl hydrogen bonds play a major role in the crystal packing of compounds 1, 2 and 4. In the two-dimensional non-covalent structure of 1, there are two distinctly different coordination modes for the mercury atoms. One mercury atom has pseudo-trigonal bipyramidal geometry and the other adopts a distorted tetrahedral environment. In the dinuclear structures of 2 and 4 the neutral molecules are linked together by the CH⋯Cl hydrogen bonds, forming an infinite one-dimensional zigzag chain structure. Compounds 2–4 are isostructural with each other.
Graphical abstractCoordination compounds of Cd(II), Hg(II) and Fe(II) with structural diversity have been synthesized and structurally characterized. In the structure of 1, there are two distinctly different coordination modes for the mercury atoms.Figure optionsDownload full-size imageDownload as PowerPoint slide
