The first barbiturate-bridged manganese(II) polymer: Synthesis,crystal structure,and magnetic properties |
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| Authors: | J. Chu Z. Y. Liu X. J. Zhao E. C. Yang |
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| Affiliation: | 1.College of Chemistry, Tianjin Key Laboratory of Structure and Performance for Functional Molecules,Tianjin Normal University,Tianjin,P.R. China |
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| Abstract: | Self-assembly of barbituric acid with Mn(II) salt in slightly basic medium generates the first barbiturate-bridged polymer, [Mn(Barb)2(H2O)2] n (I) (Barb = barbiturate), which was fully characterized by single-crystal X-ray diffraction, elemental analysis, FT-IR, TG-DTA, and variable-temperature magnetic susceptibility. In the crystal, the unique octahedral Mn2+ ion is periodically linked into a one-dimensional linear chain by pairs of monodentate-bridging Barb anions, which is further aggregated into a three-dimensional supramolecular architecture by popular hydrogen-bonding interactions. Additionally, complex I with considerably higher thermal stability displayed weak antiferromagnetic coupling interactions between the Barb-bridged paramagnetic Mn(II) centers. |
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