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Synthesis, crystal structure, thermal and spectroscopic properties of ZnX2-2-methylpyrazine (X = Cl, Br, I) coordination compounds

  • Christian Näther EMAIL logo , Inke Jess and Sebastian Mangelsen EMAIL logo
Published/Copyright: March 8, 2023
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Zeitschrift für Naturforschung B
From the journal Zeitschrift für Naturforschung B Volume 78 Issue 3-4

Abstract

Reaction of zinc(II) chloride, bromide and iodide with 2-methylpyrazine (2-Mepyz) leads to the formation of coordination compounds with the composition ZnX2(2-Mepyz)2 (X = Cl; 1-Cl, Br; 1-Br and I; 1-I). In the compounds each Zn cation is tetrahedrally coordinated by two halide anions and two 2-methylpyrazine ligands forming discrete complexes. TG-DTA and temperature dependent PXRD measurements prove that upon heating compounds 1 transform into new compounds with the composition ZnX2(2-Mepyz) (2), that are subsequently converted into compounds with the composition (ZnX2)3(2-Mepyz) (3) upon further heating. It was also found that compounds 2 can be prepared directly in solution. For ZnI2(2-Mepyz) (2-I) crystals were obtained and characterized by single crystal X-ray diffraction, whereas the crystal structures of 2-Cl and 2-Br were determined ab initio from PXRD data. In these compounds the Zn cations are also tetrahedrally coordinated and linked into chains by bridging 2-methylpyrazine ligands. The (ZnX2)3(2-Mepyz) compounds can only be obtained by thermal decomposition, and the products are of poor crystallinity and extremely hygroscopic, which prevented structure determinations.

Keywords: 2-methylpyrazine; coordination compounds; crystal structures; thermal properties; zinc(II) halides
Corresponding authors: Christian Näther and Sebastian Mangelsen, Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Straße 2, 24118 Kiel, Germany, E-mail: (C. Näther), (S. Mangelsen)
Dedicated to Professor Gerhard Müller on the occasion of his 70th birthday.

Funding source: State of Schleswig-Holstein

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: This work was supported by the state of Schleswig-Holstein.

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Supplementary Material

This article contains supplementary material (https://doi.org/10.1515/znb-2022-0306).

Received: 2022-12-22
Accepted: 2023-01-05
Published Online: 2023-03-08
Published in Print: 2023-03-28

© 2023 Walter de Gruyter GmbH, Berlin/Boston

Articles in the same Issue

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  2. In this issue
  3. Preface
  4. Professor Dr. Gerhard Müller. Editor-in-Chief der Zeitschrift für Naturforschung B – Chemical Sciences. zum 70. Geburtstag
  5. Research Articles
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  12. Synthesis, crystal structure, thermal and spectroscopic properties of ZnX2-2-methylpyrazine (X = Cl, Br, I) coordination compounds
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https://doi.org/10.1515/znb-2022-0306
Keywords for this article
2-methylpyrazine; coordination compounds; crystal structures; thermal properties; zinc(II) halides

Articles in the same Issue

  1. Frontmatter
  2. In this issue
  3. Preface
  4. Professor Dr. Gerhard Müller. Editor-in-Chief der Zeitschrift für Naturforschung B – Chemical Sciences. zum 70. Geburtstag
  5. Research Articles
  6. Ferrocenylmethylation of theophylline
  7. Electron density of a cyclic tetrasaccharide composed of benzoylated galactose units
  8. Orthoamide und Iminiumsalze, CIX. Umsetzungen von Orthoamiden der Alkincarbonsäuren mit Diolen, Ethandithiol und CH-aciden Nitroverbindungen
  9. 1,4-Divinylphenylene-bridged diruthenium complexes with 2-hydroxypyridine- and 2- or 8-hydroxyquinoline-olate ligands
  10. The calcium oxidotellurates Ca2(TeIVTeVIO7), Ca2(TeIVO3)Cl2 and Ca5(TeIVO3)4Cl2 obtained from salt melts
  11. N-heterocyclic carbene-mediated oxidation of copper(I) in an imidazolium ionic liquid
  12. Synthesis, crystal structure, thermal and spectroscopic properties of ZnX2-2-methylpyrazine (X = Cl, Br, I) coordination compounds
  13. Solid-state molecular structures of Se(IV) and Te(IV) dihalides X2Se(CH3)(C6F5) and the gas-phase structure of Se(CH3)(C6F5)
  14. Ein neuartiger T-förmiger 14-Elektronen-Iridium(I)-Komplex stabilisiert durch eine agostische Ir–H-Wechselwirkung
  15. Exploring dicyanamides with two different alkali-metal cations: phase separations, solid solutions and the new compound Rb1.667Cs0.333[N(CN)2]2
  16. Eu4Al13Pt9 – a coloring variant of the Ho4Ir13Ge9 type structure
  17. Decoration of the [Nb6O19]8– cluster shell with six Cu2+-centred complexes generates the [(Cu(cyclen))6Nb6O19]4+ moiety: room temperature synthesis, crystal structure and selected properties
  18. Structure and spectroscopic properties of etherates of the beryllium halides
  19. The palladium-rich silicides RE3Pd20Si6 (RE = Sc, Y and Lu)
  20. Azido and desamino analogs of the marine natural product oroidin
  21. High-pressure high-temperature preparation of CeGe3
  22. On the synthesis and crystal structure of praseodymium(III) metaborate molybdate(VI) – PrBO2MoO4
  23. A third polymorph of the zwitterionic complex trichlorido-((dimethylphosphoryl)methanaminium-κO)zinc(II)
  24. Mechanochemical synthesis and structural evaluation of a metastable polymorph of Ti3Sn
  25. Synthesis and application of calcium silicate hydrate (C-S-H) nanoparticles for early strength enhancement by eco-friendly low carbon binders
  26. Sterically crowded di-indazolyl-pyridines: Iron(II) complexation studies
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