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Coordination dimers constructed from metal(II) halides and the organic ligand 1,2-dimethoxy- 4,5-bis(2-pyridylethynyl)benzene

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Abstract

A series of new coordination compounds has been synthesized using the organic ligand 1,2-dimethoxy-4,5-bis(2-pyridylethynyl)benzene (dmpeb). The compounds all form dimers consisting of two metal cations bridged by two ligand molecules. Charge balance is provided by halide ligands, and the four-coordinate metal centers are distorted from the ideal tetrahedral environment. [CoCl2(dmpeb)]2 (1) crystallizes in the monoclinic space group P21/n with a = 8.5272(6) Å, b = 18.3653(13) Å, c = 13.3493(9) Å, β = 103.574(2)∘, V = 2032.2(2) Å3, Z = 2. [ZnCl2(dmpeb)]2 (2) is isostructural to 1 and has the cell parameters a = 8.5495(4) Å, b = 18.4049(8) Å, c = 13.3692(6) Å, β = 103.4460(10)∘, V = 2046.01(16) Å3, Z = 2. [ZnBr2(dmpeb)]2 (3) is also isostructural to 1 with a = 8.7882(5) Å, b = 18.7260(12) Å, c = 13.3857(8) Å, β = 102.5990(10)∘, V = 2149.8(2) Å3, Z = 2. Additionally, the compounds [ZnI2(dmpeb)]2 (4, cell parameters: a = 8.9650(5) Å, b = 19.1251(10) Å, c = 13.4160(7) Å, β = 101.1660(10)∘, V = 2256.7(2) Å3, Z = 2), [HgCl2(dmpeb)]2 (5, cell parameters: a = 8.8457(7) Å, b = 18.4030(15) Å, c = 13.3711(11) Å, β = 104.246(2)∘, V = 2109.7(3) Å3, Z = 2), and [HgBr2(dmpeb)]2 (6, cell parameters: a = 9.0576(5) Å, b = 18.8634(11) Å, c = 13.4535(8) Å, β = 102.9780(10)∘, V = 2239.9(2) Å3, Z = 2) are also isostructural to 1. A seventh dimeric compound, [HgI2(dmpeb)]2, not isostructural to the others was also characterized by X-ray crystallography. [HgI2(dmpeb)]2 (7) crystallizes in the triclinic space group P-1 with a = 8.8028(5) Å, b = 12.0990(7) Å, c = 12.4082(7) Å, α = 109.7240(10)∘, β = 107.3680(10)∘, γ = 93.0880(10)∘, V = 1169.57(12) Å3, Z = 1.

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Author notes

  1. Jeffrey E. Fiscus

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

  2. Uwe H. F. Bunz

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

Authors and Affiliations

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

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

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

    Ralph C. Layland

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

    Hans-Conrad zur Loye

Authors
  1. Jeffrey E. Fiscus
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  2. Sandra Shotwell
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  3. Ralph C. Layland
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  4. Rachael E. Hipp
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  5. Andrea M. Goforth
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  6. Craig T. Chapman
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  7. Mark D. Smith
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  8. Uwe H. F. Bunz
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  9. Hans-Conrad zur Loye
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Correspondence to Hans-Conrad zur Loye.

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Fiscus, J.E., Shotwell, S., Layland, R.C. et al. Coordination dimers constructed from metal(II) halides and the organic ligand 1,2-dimethoxy- 4,5-bis(2-pyridylethynyl)benzene. J Chem Crystallogr 35, 903–912 (2005). https://doi.org/10.1007/s10870-005-5136-6

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  • DOI: https://doi.org/10.1007/s10870-005-5136-6

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