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Journal of Chemical Crystallography

, Volume 42, Issue 1, pp 76–82 | Cite as

Hydrogen Bonded Supramolecular Network from a Mixed Valence Cobalt System: Synthesis and Crystal Structure of [Co(H2O)6][Co(pydc)2(en)]2·14H2O

  • Alper Tolga Çolak
  • Gönül Pamuk
  • Okan Zafer Yeşilel
  • Filiz Yılmaz
  • Orhan Büyükgüngör
Original Paper

Abstract

The [Co(H2O)6][Co(pydc)2(en)]2·14H2O (1) compound (H2pydc = Pyridine-2,3-dicarboxylic acid and en = ethylenediamine) was synthesized and characterized by elemental analysis, magnetic and spectroscopic measurements (UV–Vis and IR spectra) and single crystal X-ray diffraction technique. There are two coordination spheres with different charges inside this aqueous compound of ionic character. The cationic part is composed of Co(II) encircled by six aqua ligand. Whereas the anionic part contains two anions complex unit each with −1 charge and have Co(III) ions in the centre. As a result different coordination spheres have cobalt ions with different states. The crystallographic analysis revealed that 1 consists of both discrete one-cationic and two-anionic entities, [Co(H2O)6]2+ and [Co(pydc)2(en)] 2 and fourteen crystal water molecules. Two water molecules within the water cluster act as hydrogen-bonding acceptors, whereas one water molecule acts as a hydrogen-bonding donor to form a discrete water trimer. These water molecules have stabilized the crystal structure by strong hydrogen bonding interactions.

Graphical Abstract

The [Co(H2O)6][Co(pydc)2(en)]2·14H2O (1) was synthesized and characterized by elemental analysis, magnetic and spectroscopic measurements and single crystal X-ray diffraction technique. There are two coordination spheres with different charges inside this aqueous compound of ionic character. The compound presented in this work corresponds to a class I compound according to Robin–Day classificationThe [Co(H2O)6][Co(pydc)2(en)]2·14H2O (1) was synthesized and characterized by elemental analysis, magnetic and spectroscopic measurements and single crystal X-ray diffraction technique. There are two coordination spheres with different charges inside this aqueous compound of ionic character. The compound presented in this work corresponds to a class I compound according to Robin–Day classificationThe [Co(H2O)6][Co(pydc)2(en)]2·14H2O (1) was synthesized and characterized by elemental analysis, magnetic and spectroscopic measurements and single crystal X-ray diffraction technique. There are two coordination spheres with different charges inside this aqueous compound of ionic character. The compound presented in this work corresponds to a class I compound according to Robin–Day classification

Keywords

Mixed-valence complex Pyridine-2,3-dicarboxylate complex Ethylenediamine complex Hexaaqua complex 

Notes

Acknowledgments

This study is part of a research project 209T119. We thank TÜBİTAK for the financial support given to the project.

Supplementary material

10870_2011_206_MOESM1_ESM.doc (78 kb)
(DOC 79 kb)

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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Alper Tolga Çolak
    • 1
  • Gönül Pamuk
    • 1
  • Okan Zafer Yeşilel
    • 2
  • Filiz Yılmaz
    • 3
  • Orhan Büyükgüngör
    • 4
  1. 1.Department of Chemistry, Faculty of Arts and SciencesDumlupınar UniversityKütahyaTurkey
  2. 2.Department of Chemistry, Faculty of Arts and SciencesEskişehir Osmangazi UniversityEskişehirTurkey
  3. 3.Department of Chemistry, Science FacultyAnadolu UniversityEskişehirTurkey
  4. 4.Department of Physics, Faculty of Arts and SciencesOndokuz Mayıs UniversityKurupelitTurkey

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