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Related Experiment Video

Updated: May 24, 2026

Chemoselective Preparation of 1-Iodoalkynes, 1,2-Diiodoalkenes, and 1,1,2-Triiodoalkenes Based on the Oxidative Iodination of Terminal Alkynes
09:54

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Published on: September 12, 2018

Tris(1,2-dimeth-oxy-ethane-κO,O')iodidocalcium iodide.

Siou-Wei Ou, Wei-Yi Lu, Hsuan-Ying Chen

    Acta Crystallographica. Section E, Structure Reports Online
    |February 21, 2012
    PubMed
    Summary

    This study details the crystal structure of a novel calcium(II) complex, [CaI(1,2-dimethoxyethane)3]I. The calcium ion exhibits a unique seven-coordinate distorted pentagonal bipyramidal geometry.

    Area of Science:

    • Inorganic Chemistry
    • Coordination Chemistry
    • Crystallography

    Background:

    • Calcium(II) complexes are crucial in various biological and chemical processes.
    • Understanding the coordination environment of metal ions is key to predicting their reactivity.
    • 1,2-dimethoxyethane (DME) is a common chelating ligand in organometallic chemistry.

    Purpose of the Study:

    • To elucidate the coordination geometry and structure of a novel calcium(II) complex.
    • To characterize the bonding interactions within the [CaI(DME)3]I complex.
    • To provide insights into the role of iodide as a ligand in calcium coordination.

    Main Methods:

    • Single-crystal X-ray diffraction was employed to determine the molecular structure.
    • The coordination environment around the central Ca(II) atom was analyzed.

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    Published on: May 16, 2014

  • Crystal structure analysis was used to identify ligand arrangement and coordination number.

    • Main Results:

    • The calcium(II) ion is seven-coordinated, featuring a distorted pentagonal bipyramidal geometry.
    • Six oxygen atoms from three 1,2-dimethoxyethane (DME) ligands and one iodide anion coordinate to the Ca(II) center.
    • An additional iodide anion is present as a counter-ion outside the coordination sphere.

    Conclusions:

    • The study successfully determined the crystal structure of the [CaI(DME)3]I complex.
    • The distorted pentagonal bipyramidal coordination geometry around Ca(II) highlights unusual ligand arrangements.
    • The findings contribute to the understanding of calcium coordination chemistry and the influence of iodide ligands.