title: A new two-dimensional manganese(II) coordination polymer based on thiophene-3,4-dicarboxylic acid.
abstract: A novel manganese coordination polymer, poly[(μ5-thiophene-3,4-dicarboxylato)manganese(II)], [Mn(C6H2O4S)]n, was synthesized hydrothermally using 3,4-thiophenedicarboxylate (3,4-tdc(2-)) as the organic linker. The asymmetric unit of the complex contains an Mn(2+) cation and one half of a deprotonated 3,4-tdc(2-) anion, both residing on a twofold axis. Each Mn(2+) centre is six-coordinated by O atoms of bridging/chelating carboxylate groups from five 3,4-tdc(2-) anions, forming a slightly distorted octahedron. The Mn(2+) centres are bridged by 3,4-tdc(2-) anions to give an infinite two-dimensional layer which incorporates one-dimensional Mn-O gridlike chains, and in which the 3,4-tdc(2-) anion adopts a novel hexadentate chelating and μ5-bridging coordination mode. The fully deprotonated 3,4-tdc(2-) anion exhibits unexpected efficiency as a ligand towards the Mn(2+) centres, which it coordinates through all of its carboxylate O atoms to provide the novel coordination mode. The IR spectrum of the complex is also reported.
authors.affiliation: College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, Henan 471022, People's Republic of China.
authors.forename: Gui-Xia
authors.initials: GX
authors.lastname: Wang
authors.affiliation: College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, Henan 471022, People's Republic of China.
authors.forename: Li-Li
authors.initials: LL
authors.lastname: Shang
authors.affiliation: College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, Henan 471022, People's Republic of China.
authors.forename: Zhao-Hao
authors.initials: ZH
authors.lastname: Li
authors.affiliation: College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, Henan 471022, People's Republic of China.
authors.forename: Bang-Tun
authors.initials: BT
authors.lastname: Zhao
keywords: crystal structure; manganese complex; thiophene-3,4-dicarboxylate; two-dimensional coordination polymer