A novel Mn(II) oxalato-bridged 2D coordination polymer: synthesis, crystal structure, spectroscopic, thermal and magnetic properties

  • Hiba Sehimi
  • Mohamed Faouzi Zid
Regular Article


Besides the fact that direct synthesis of oxalate-based Mn(II) complexes did not succeed a lot due to the high insolubility of manganese oxalate \((\hbox {Mn}^{\mathrm{II}}(\hbox {C}_{2}\hbox {O}_{4})\cdot \hbox {2H}_{2}\hbox {O})\), a new 2D polymeric Mn(II) salt has been synthesized by slow evaporation at room temperature and its structure has been determined by single-crystal X-ray diffraction. The structure was solved by direct methods and refined to conventional agreement indices. The crystal structure is built from anionic, two-dimensional, honeycomb networks formed by the oxalate-bridged Mn(II) ions, interleaved by 2,6-diaminopyridinium cations that are entrapped between the layers. The interactions between adjacent layers result from the extended network of intermolecular hydrogen bonds created by the mentioned cations and water molecules. The complex has been fully characterized by single crystal X-ray diffraction, FT-IR and UV–Vis spectroscopy, Rietveld refinement, TGA–DSC analysis and magnetic susceptibility. The title compound exhibits antiferromagnetic coupling between Mn(II) centres.

Graphical Abstract

SYNOPSIS A new 2D polymeric oxalate-based Mn(II) salt has been synthesized by slow evaporation at room temperature and its structure has been determined by single-crystal X-ray diffraction. The crystal structure is built from anionic, two-dimensional, honeycomb networks formed by the oxalate-bridged Mn(II) ions, interleaved by 2,6-diaminopyridinium cations that are entrapped between the layers.


2D coordination polymer manganese oxalate magnetism 



Financial support from the Ministry of Higher Education and Scientific Research of Tunisia is gratefully acknowledged. H. S. also thanks, Dr. Elisa Barea (Department of Inorganic Chemistry, University of Granada) for support and advice during her short-term stay in the University of Granada, where most of the characterization of the reported compound was conducted.

Supplementary material

12039_2018_1427_MOESM1_ESM.pdf (199 kb)
Supplementary material 1 (pdf 198 KB)
12039_2018_1427_MOESM2_ESM.docx (24 kb)
Supplementary material 2 (docx 24 KB)
12039_2018_1427_MOESM3_ESM.pdf (277 kb)
Supplementary material 3 (pdf 277 KB)


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Copyright information

© Indian Academy of Sciences 2018

Authors and Affiliations

  1. 1.Laboratoire de matériaux, cristallochimie et thermodynamique appliquée, Faculté des Sciences de TunisUniversité de Tunis El ManarTunisTunisia
  2. 2.Faculté des Sciences de GabèsUniversité de GabèsGabèsTunisia

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