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Thermochemical Studies of Ni(II) and Zn(II) Ternary Complexes Using Ion Mobility-Mass Spectrometry
Published on: June 8, 2022
Poly[[μ(2)-aqua-tetraaquadi-μ(3)-malonato-nickel(II)strontium(II)] dihydrate]
Ming-Lin Guo1, Long Liu, Cong-Cong Lu
1School of Environment and Chemical Engineering and Key Laboratory of Hollow Fiber Membrane Materials & Membrane Processes, Tianjin Polytechnic University, Tianjin 300160, People's Republic of China.
Acta Crystallographica. Section E, Structure Reports Online
|April 28, 2011
Summary
This study details the crystal structure of a novel mixed-metal coordination polymer containing nickel and strontium. The research reveals a unique metal-organic framework with intricate hydrogen bonding networks formed by water molecules.
Area of Science:
- Inorganic Chemistry
- Crystallography
- Materials Science
Background:
- Previous work reported unit-cell parameters for the title mixed-metal coordination polymer, {[NiSr(C(3)H(2)O(4))(2)(H(2)O)(5)]·2H(2)O}(n).
- The compound is isostructural with its cobalt-containing analogue.
Purpose of the Study:
- To report the full crystal structure of the {[NiSr(C(3)H(2)O(4))(2)(H(2)O)(5)]·2H(2)O}(n) coordination polymer.
- To describe the hydrogen bonding network within the crystal structure.
Main Methods:
- Single-crystal X-ray diffraction analysis.
- Structural characterization of the coordination polymer.
- Analysis of coordination geometry and hydrogen bonding patterns.
Main Results:
- The strontium ion exhibits a distorted tricapped trigonal-prismatic coordination geometry, bonded to malonate dianions and water molecules.
- A dianionic [Ni(C(3)H(2)O(4))(2)(H(2)O)(2)](2-) unit, featuring a distorted NiO(6) octahedron, coordinates to three Sr(2+) ions.
- A metal-organic framework with a 20-membered ring (containing Ni and Sr atoms) is formed in the bc plane.
- Water molecules form two D5 hydrogen-bonded chains and an R4 water cluster through bifurcated hydrogen bonds.
Conclusions:
- The detailed crystal structure reveals the coordination environment of Ni(2+) and Sr(2+) ions and the formation of a complex metal-organic framework.
- The study elucidates the significant role of water molecules in constructing intricate hydrogen-bonded networks within the framework.
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