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Updated: May 13, 2026
19:58
Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
Published on: July 30, 2017
catena-Poly[di-μ3-bromido-hexa-μ2-bromido-dibromidobis(O-methyl pyridine-2-carboximidate-κ(2) N,N')penta-mercury(II)]
Sadif A Shirvan1, Moayad Hossaini Sadr
1Department of Chemistry, Omidieh Branch, Islamic Azad University, Omidieh, Iran.
Summary
This study details a novel mercury-bromine coordination polymer, [Hg5Br10(C7H8N2O)2]n, featuring complex bridging and terminal bromine atoms. The structure exhibits diverse mercury coordination geometries, forming an extended ribbon architecture.
Area of Science:
- Inorganic Chemistry
- Coordination Chemistry
- Materials Science
Background:
- Coordination polymers offer diverse structural motifs and properties.
- Mercury(II) halides are known to form various polymeric structures.
- Understanding the synthesis and structural characterization of novel coordination compounds is crucial for materials development.
Purpose of the Study:
- To synthesize and characterize a new mercury-bromine coordination polymer.
- To elucidate the coordination environment of mercury(II) ions within the structure.
- To investigate the role of bridging and terminal bromine atoms in forming the extended structure.
Main Methods:
- Single-crystal X-ray diffraction for structural determination.
- Elemental analysis for composition verification.
- Infrared spectroscopy for ligand identification.
Main Results:
- The title compound, [Hg5Br10(C7H8N2O)2]n, was synthesized and structurally characterized.
- The structure contains two μ3-bridging Br, six μ2-bridging Br, and two terminal Br atoms.
- Mercury(II) ions exhibit diverse coordination geometries: distorted octahedral, square-pyramidal, and tetrahedral.
- Bromine atoms bridge Hg(II) centers, forming a ribbon structure along the [100] direction.
Conclusions:
- The study successfully characterized a novel mercury-bromine coordination polymer with a unique ribbon structure.
- The diverse coordination environments of Hg(II) ions are dictated by the bridging and terminal bromine atoms.
- The findings contribute to the understanding of mercury coordination chemistry and the formation of extended inorganic-organic hybrid materials.
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