The guanidinium t-diaqua-bis(oxalato)chromate(III) dihydrate complex: synthesis, crystal structure, EPR spectroscopy and magnetic properties
Author:
Kamga Idelle Nono1, Nana Augustin Nkwento1, Ndosiri Bridget Ndoye1, Capet Frédéric2, Foulon Michel3, Nenwa Justin1
Affiliation:
1. Inorganic Chemistry Department , University of Yaounde 1 , P. O. Box 812 , Yaounde , Cameroon 2. Université de Lille, CNRS, Centrale Lille, Université Artois, UMR 8181 – UCCS – Unité de Catalyse et Chimie du Solide , F-59000 Lille , France 3. Département de Physique , Université de Lille , F-59650 Lille , Villeneuve d’Ascq , France
Abstract
Abstract
A new salt (CH6N3)[t-Cr(C2O4)2(H2O)2]·2H2O (1) (CH6N3
+ = guanidinium cation) has been synthesized and characterized by single-crystal X-ray diffraction, FT-IR and UV–Vis spectroscopies, elemental and thermogravimetric analyses. In the crystal structure of 1, the chromate(III) ion lies on an inversion center in the form of an elongated octahedron. The coordination sphere consists of four oxygen atoms of two chelating oxalato ligands in the equatorial plane and two axial oxygen atoms of water ligands. The structural feature of focal interest in the structure of 1 is the formation of pillars of [Cr(C2O4)2(H2O)2]− complex anions and CH6N3
+ guanidinium cations, with the next-neighbor cations rotated by an angle of 60° relative to each other. O–H···O and N–H···O hydrogen bonds play an important role in the construction of the three-dimensional network. The electron paramagnetic resonance (EPR) and magnetic properties of 1 have also been investigated.
Publisher
Walter de Gruyter GmbH
Subject
General Chemistry
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