Crystal structure and magnetic properties of dicarboxylate-bridged linear chain Mn(II) complexes |
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| Institution: | 1. Department of Chemistry and RRC/NMR, Kongju National University, 182 Shinkwan, Chungnam, Kongju 314-701, South Korea;2. Nondestructive Research Laboratory of Cultural Property, Kongju National University, 182 Shinkwan, Chungnam, Kongju 314-701, South Korea;3. Department of Molecular Science and Technology, Ajou University, Kyunggi, Suwon, South Korea;1. School of Materials Science and Engineering, Beihang University, Beijing, 100191, China;2. Composite Technology Center, Aviation Industry of China, Beijing, 101300, China;3. School of Electronic and Information Engineering, Beihang University, Beijing, 100191, China;1. Zhejiang Provincial Engineering Research Center for Green and Low-carbon Dyeing & Finishing, Eco-Dyeing and Finishing Engineering Research Center, Ministry of Education, National Base for International Science and Technology Cooperation in Textiles and Consumer-Goods Chemistry, Zhejiang Sci-Tech University, Hangzhou, 310018, China;2. Biomass Molecular Engineering Center, Department of Materials Science and Engineering, Anhui Agricultural University, Hefei, 230036, China;1. Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, China;2. Department of Physics, College of Physical Science and Technology, Xiamen University, Xiamen, Fujian, 361005, China;3. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China |
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| Abstract: | Two manganese(II) complexes, Mn(mtm)(CH3OH)2(H2O)]n (1) and Mn2(mtm)2(2,2′-bipy)2]n (2) (bipy=bipyridine, mtm=bis(methylthio)methylene]malonate) were synthesized and characterized by X-ray crystallography. Structure of 1 consists of octahedral manganese(II) species which are extended by carboxylate bridges in syn–anti fashion along the c-axis. Chains of 1 are associated by hydrogen bonding among coordinating water and methanol molecules and carboxylate oxygen atoms, forming two-dimensional structures. The crystallographic asymmetric unit of 2 comprises two Mn(2,2′-bipy)(mtm)] units in which Mn(II) atoms are bridged by μ2-oxygens from carboxylate to form Mn2O2 rhombus. The dimeric units are linked doubly by second carboxylates in syn–anti fashion, resulting in a chain structure. The antiferromagnetic coupling of Mn(II) ions in 1 (?0.2 cm?1) and 2 (?1.57 cm?1) was determined from variable-temperature magnetic susceptibility data in the temperature range of 2–300 K. |
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