Publications scientifiques
Idelle N. Kamga
Augustin N. Nana
Bridget N. Ndosiri
Frédéric Capet
Autres affiliations : Université de Lille · Unité de catalyse et de chimie du solide de Lille · Université d'Artois · École Centrale de Lille
Michel Foulon
Zeitschrift für Naturforschung B
Abstract A new salt (CH 6 N 3 )[ t -Cr(C 2 O 4 ) 2 (H 2 O) 2 ]·2H 2 O ( 1 ) (CH 6 N 3 + = 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(C 2 O 4 ) 2 (H 2 O) 2 ] − complex anions and CH 6 N 3 + 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.
