The first 3, 5, 6-trichloropyridine-2-oxyacetate bridged manganese coordination polymer with features of π⋯π stacking and halogen⋯halogen interactions: Synthesis, crystal analysis and magnetic properties

A new double-stranded chain manganese complex has been synthesized and structurally characterized, in which 3, 5, 6-tcpa− ligand adopts a new coordination mode of bidentate bridging-μ2. Magnetic studies reveal that it exhibits antiferromagnetic coupling behavior. [Display omitted] •A new double-stra...

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Veröffentlicht in:Inorganica Chimica Acta 2020-09, Vol.509, p.119677, Article 119677
Hauptverfasser: Li, Jun-Xia, Du, Zhong-Xiang, Pan, Qiu-Yue, Zhang, Lu-Lu, Liu, Duo-Li
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Sprache:eng
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Zusammenfassung:A new double-stranded chain manganese complex has been synthesized and structurally characterized, in which 3, 5, 6-tcpa− ligand adopts a new coordination mode of bidentate bridging-μ2. Magnetic studies reveal that it exhibits antiferromagnetic coupling behavior. [Display omitted] •A new double-stranded chain manganese 1 complex containing 3, 5, 6-Htcpa was described.•The 3, 5, 6-tcpa− ligand adopts a new coordination mode of bidentate bridging-μ2 in 1.•The crystal packing of 1 contain π⋯π stacking and Cl⋯Cl halogen bonds interactions.•The magnetic properties for 1 have been discussed. A new coordination polymer [Mn(3, 5, 6-tcpa)2(2, 2′-bipy)]n (1) has been synthesized by the hydrothermal reaction of manganese sulfate hydrate with 3, 5, 6-trichloropyridine-2-oxyacetic acid (3, 5, 6-Htcpa) and 2, 2′-bipyridine (2, 2′-bipy) coligands. The X-ray single-crystal diffraction analysis shows that the MnII center is in deformed octahedral geometry bonded by two pyridyl nitrogen atoms of 2, 2′-bipy molecule and four carboxy oxygen atoms of four different 3, 5, 6-tcpa− ligands. The 3, 5, 6-tcpa− anions play as bidentate bridging-μ2 linkers and connect neighbouring MnII ions together to form the 1D double-stranded chain structure of 1, which displays interesting chair form [Mn2(COO)2] eight-membered rings. 1 is further assembled into 3D network by the co-effects of π⋯π stacking and Cl⋯Cl halogen bonds interactions. In addition, the magnetic characterizations indicated weak antiferromagnetic coupling between MnII centers for 1.
ISSN:0020-1693
1873-3255
DOI:10.1016/j.ica.2020.119677