Abstract
Abstract Two organic–inorganic hybrid compounds with the formula {[Mn III (Salen)(H 2 O)] 4 MoO 4 }·Cl 2 ·16H 2 O ( 1 ) and {[Mn III (Salen)(H 2 O)] 4 WO 4 }·(CH 3 COO) 2 ·11H 2 O ( 2 ) (Salen = Di-[2-hydroxyl-3-methoxyl-benzaldehyde] ethylenediamine) have been synthesized and structurally characterized by IR, UV–vis spectroscopy, TG analysis and single crystal X-ray diffraction. Structural analysis revealed that compounds 1 and 2 consist of a [MoO 4 ] 2 − or [WO 4 ] 2 − building unit and four {[Mn III (Salen)(H 2 O)] + metal–organic moieties, respectively. In the crystal structure, the [MoO 4 ] 2 − or [WO 4 ] 2 − tetrahedra coordinated with four Mn III ions, resulting in the penta-nuclear heterometallic tetrahedra cluster compounds, which were rarely observed in the Mn-Salen system. Magnetic study revealed that there was antiferromagnetic coupling in the two compounds.
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