Title :

Two tris(oxalato)ferrate(III) hybrid salts with pyridinium derivative isomers as counter cations: synthesis, crystal structures, thermal analyses, and magnetic properties

Author(s) :

Nguemdzi, Carole F. N. [Auteur]
University of Yaoundé [Cameroun]
Capet, Frederic [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Ngouné, Jean [Auteur]
Université de Dschang
Bebga, Gouet [Auteur]
University of Yaoundé [Cameroun]
Foulon, Michel [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Université de Lille, Sciences et Technologies
Nenwa, Justin [Auteur]
University of Yaoundé [Cameroun]

Journal title :

Journal of Coordination Chemistry

Volume number :

71

Pages :

1484-1496

Publisher :

Taylor & Francis

Publication date :

2018-04-30

English keyword(s) :

Hybrid salts
oxalate iron(III) complexes
crystal structures
thermal behavior
magnetic properties

HAL domain(s) :

Chimie

English abstract : [en]

Two organic–inorganic hybrid salts, tris(2-amino-4,6-dimethylpyridinium) tris(oxalato)ferrate(III), (C7H11N2)3[Fe(C2O4)3] (1), and tris(4-dimethylaminopyridinium) tris(oxalato)ferrate(III) tetrahydrate, (C7H11N2)3[Fe(C2O4)3]·4H2O ...
Show more >Two organic–inorganic hybrid salts, tris(2-amino-4,6-dimethylpyridinium) tris(oxalato)ferrate(III), (C7H11N2)3[Fe(C2O4)3] (1), and tris(4-dimethylaminopyridinium) tris(oxalato)ferrate(III) tetrahydrate, (C7H11N2)3[Fe(C2O4)3]·4H2O (2), have been synthesized and characterized by elemental and thermal analyses, IR spectroscopy, single-crystal X-ray diffraction, and SQUID magnetometry. Compounds 1 and 2 crystallize in triclinic P-1 and monoclinic C2/c space groups, respectively. Each compound contains the anionic complex [Fe(C2O4)3]3- in which the central metal is six-coordinate in a slightly distorted octahedron defined by three chelating oxalate(2-) ligands. The two substituted pyridinium cations are isomers. However, due to the great steric hindrance provided by the bulky cation, 2-amino-4,6-dimethylpyridinium, only the 4-dimethylaminopyridinium cation, the smallest of this series, led to formation of 2 with enough vacant spaces to be occupied by four solvent water molecules. In the crystals, cations and anions are connected via hydrogen-bonds of the types N–H⋯O in 1 and N–H⋯O and O–H⋯O in 2, with π–π stacking interactions between the pyridine rings stabilizing the 3-D framework. The thermal studies confirmed the anhydrous character of salt 1 and the presence of water molecules in salt 2. The magnetic susceptibility measurements in the 2–300 K temperature range revealed weak antiferromagnetic coupling in the two salts.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

ENSCL
CNRS
Centrale Lille
Univ. Artois
Université de Lille

Collections :

• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Submission date :

2019-09-25T14:37:55Z
2021-03-23T09:28:34Z