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Synthesis, crystal structure and magnetic properties of a novel iron(III) 18-azametallacrown-6 compound |
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| Authors: | Shen Lin Shi-Xiong Liu Bi-Zhou Lin |
| Affiliation: | a Department of Chemistry, Fuzhou University, Fuzhou 350002, China b Department of Chemistry, Fujian Normal University, Fuzhou 350007, China c State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, the Chinese Academy of Sciences, Fuzhou 350002, China d Institute of Material Physical Chemistry, Huaqiao University, Quanzhou, Fujian 362011, China |
| Abstract: | A novel macrocyclic hexanuclear iron(III) 18-azametallacrown-6 compound, [Fe6(C9H7N2O3)6(CH3OH)6]·8CH3OH·2H2O, has been prepared using a trianionic pentadentate ligand N-acetylsalicylhydrazide (ashz3−) and characterized by X-ray diffraction. Due to the meridional coordination of the ligand to the Fe3+ ion, the ligand enforces the stereochemistry of the Fe3+ ions as a propeller configuration with alternating Λ/Δ forms. The disc-shaped hexanuclear ring shows about 6.20 Å in diameter at entrance, about 9.31 Å at its largest diameter at the center of the cavity, respectively. There are many kinds of intramolecular and intermolecular hydrogen bonds in the title compound. The OH?O hydrogen bond distances range from 2.609(5)-2.901(5) Å. The magnetic susceptibility (4-275K) study indicates antiferromagnetic exchange interactions between the adjacent Fe3+ ions around the ring. |
| Keywords: | Metallacrown Iron complexes Crystal structures Magnetic properties Supramolecular chemistry |
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