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Synthesis and structural characterization of five new coordination polymer chain structures using a new, Z-shaped ligand, 2,2′-bis-(4-pyridylethynyl)tolane

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Abstract

Using the new ligand, 2,2′-bis-(4-pyridylethynyl)tolane we have synthesized five new coordination polymers: HgBr2[2,2′-bis-(4-pyridylethynyl)tolane] (1), HgI2[2,2′-bis-(4-pyridylethynyl)tolane] (2), Ni(acetylacetonate)2[2,2′-bis-(4-pyridylethynyl)tolane] (3), Zn(acetylacetonate)2[2,2′-bis-(4-pyridylethynyl)tolane] (4), and Cu(hexafluoro acetylacetonate)2[2,2′-bis-(4-pyridylethynyl)tolane]⋅CHCl3 (5). 2,2′-Bis-(4-pyridyl ethynyl)tolane is a rigid ligand with a Z-shape that promotes the formation of zig-zag chains. Compounds 1– 5 were characterized by single crystal X-ray diffraction; and compounds 1– 3 were additionally characterized by IR, elemental analysis, and thermogravimetric analysis. Compound 1 crystallizes in the monoclinic space group C2/c with a = 29.761(3) Å, b = 5.0531(5) Å, c = 16.7823(15) Å, β = 104.090(2)∘, V = 2447.9(4) Å3, Z = 4. Each mercury is bound to two tolane ligands and two bromine anions, resulting in a tetrahedral coordination environment. Compound 2 crystallizes in the monoclinic space group P2/c, with a = 20.3061(17) Å, b = 5.6303(5) Å, c = 24.5459(19) Å, β = 110.338(2)∘, V = 2631.4(4) Å3, Z = 4. Here also, each mercury is bound to two tolane ligands and two iodine anions in a tetrahedral coordination environment. The ligand orientation differs in compounds 1 and 2 being trans oriented in 1 and cis oriented in 2. Compound 3 crystallizes in the monoclinic space group P21/c with a = 14.5947(14) Å, b = 6.3082(6) Å, c = 18.3939(18) Å, β = 112.112(2)∘, V = 1568.9(3) Å3, Z = 2. Each nickel is bound to two tolane ligands and two bidentate AcAc anions, resulting in an octahedral coordination environment. Compound 4, which is isostructural with 3, also crystallizes in the monoclinic space group P21/c with a = 14.6990(9) Å, b = 6.2724(4) Å, c = 18.6433(11) Å, β = 112.8610(10)∘, V = 1583.86(17) Å3, Z = 2. Compound 5 crystallizes in the triclinic space group P-1 with a = 6.5487(4) Å, b = 11.6471(7) Å, c = 14.3225(9) Å, α = 70.1360(10)∘, β = 89.3990(10)∘, γ = 88.7680(10)∘, V = 1027.18(11) Å3, Z = 1. Each copper in 5 is bound to two tolane ligands and two bidentate hfAcAc anions, resulting in an octahedral coordination environment identical to that found in 3 and 4.

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Author notes

  1. Jeffrey E. Fiscus

    Present address: Department of Mathematics and Natural Sciences, University of Saint Mary, Leavenworth, Kansas, 66048

  2. Uwe H. F. Bunz

    Present address: Department of Chemistry, Georgia Institute of Technology, Atlanta, Georgia, 30322

Authors and Affiliations

  1. Department of Chemistry and Biochemistry, The University of South Carolina, Columbia, South Carolina, 29208

    Jeffrey E. Fiscus, Neil Pschirer, Rachael E. Hipp, Andrea M. Goforth, Craig Chapman, Sandra Shotwell, Mark D. Smith, Uwe H. F. Bunz & Hans-Conrad zur Loye

  2. Department of Physical Sciences, Lander University, Greenwood, South Carolina, 29649

    Ralph C. Layland

  3. Graduate Sciences Research Center, 631 Sumter Street, Columbia, SC, 29208

    Hans-Conrad zur Loye

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  1. Jeffrey E. Fiscus
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  2. Neil Pschirer
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Correspondence to Hans-Conrad zur Loye.

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Fiscus, J.E., Pschirer, N., Hipp, R.E. et al. Synthesis and structural characterization of five new coordination polymer chain structures using a new, Z-shaped ligand, 2,2′-bis-(4-pyridylethynyl)tolane. J Chem Crystallogr 35, 125–134 (2005). https://doi.org/10.1007/s10870-005-2801-8

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  • DOI: https://doi.org/10.1007/s10870-005-2801-8

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