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Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene
Published on: March 20, 2017
Poly[(mu6-rac-cis-cyclohexane-1,2-dicarboxylato)strontium].
Karen A Robertson1, William T A Harrison
1Department of Chemistry, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, Scotland.
Summary
This study details a novel layered coordination polymer, [Sr(C(8)H(10)O(4))](n), featuring strontium ions with a unique SrO(8) geometry. The structure reveals interconnected sheets and a 6(3) net topology, offering insights into strontium coordination chemistry.
Area of Science:
- Materials Science
- Inorganic Chemistry
- Crystallography
Background:
- Coordination polymers offer diverse structural motifs and properties.
- Strontium-based materials are of interest for various applications.
Purpose of the Study:
- To synthesize and characterize a novel layered coordination polymer containing strontium.
- To elucidate the coordination geometry and structural connectivity of the strontium ions and ligands.
Main Methods:
- Single-crystal X-ray diffraction analysis was employed to determine the crystal structure.
- Analysis of coordination numbers, bond distances, and angles to describe the strontium environment.
- Investigation of the ligand conformation and its role in the overall structure.
Main Results:
- The strontium ion exhibits a distorted square-antiprismatic SrO(8) coordination geometry.
- Six cis-cyclohexane-1,2-dicarboxylate dianions coordinate to strontium in both bidentate and monodentate modes.
- The crystal structure forms (100) sheets with SrO(8) polyhedra sharing faces and edges, resulting in a 6(3) net topology.
- The cyclohexane ring adopts a chair conformation with a specific dihedral angle between carboxylate groups.
Conclusions:
- The synthesized compound [Sr(C(8)H(10)O(4))](n) represents a new layered coordination polymer with a unique strontium coordination environment.
- The structural arrangement highlights the versatility of cyclohexane-1,2-dicarboxylate as a ligand in coordination chemistry.
- The nonmerohedral twinning observed provides additional crystallographic data for structural analysis.
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