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    • Keywords


      Chromium (III) complex; crystal structure; spectroscopic studies; thermal behavior.

    • Abstract


      A new hybrid salt (C5H9N2)[Cr(C2O4)2 (H2O)2].3H2O, 3,5-dimethylpyrazole Cis diaquadioxala-tochromate(III) trihydrate, has been prepared by slow evaporation at room temperature and characterized by single crystal X-ray diffraction, IR, UV–visible spectroscopies, PXRD and thermogravimetric analyses. Furthermore, the observed crystal morphology was compared to the simulated one using the Bravais-Friedel, Donnay-Harker model. The structure of the title compound consists of [Cr(C2O4) 2 (H2O) 2] mononuclear anions, 3,5-dimethylpyrazole cations and three uncoordinated water molecules. The Cr3+ ion is six coordinated in a slightly distorted octahedral environment, by two O atoms from two water molecules and four O atoms of two oxalate anions acting as chelating ligands. The cohesion of the structure is established by intermolecular O–H...O, N–H...O hydrogen bonds which connect ionic entities and water molecules and also by 𝜋–𝜋 stacking interactions between the rings of 3,5-dimethylpyrazole cations. Hence, both coordinated and uncoordinated water molecules play an important role in the hydrogen-bonding system and stabilize the structure.

    • Author Affiliations


      Rihab Dridi1 Saoussen Cherni1 Mohamed Faouzi Zid1

      1. Laboratoire de Matériaux et Cristallochimie, Département de Chimie, Faculté des Sciences de Tunis, Université de Tunis El Manar, 2092 Tunis, Tunisie
    • Dates

    • Supplementary Material

  • Journal of Chemical Sciences | News

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      Posted on July 25, 2019

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