Synthesis and structural study of tris-(2,6-di-amino-pyridinium) bis-(oxalato)dioxidovanadate(V) 2.5-hydrate

Hiba Sehimi; Takashiro Akitsu; Mohamed Faouzi Zid

doi:10.1107/S2056989019005267

Synthesis and structural study of tris-(2,6-di-amino-pyridinium) bis-(oxalato)dioxidovanadate(V) 2.5-hydrate

Acta Crystallogr E Crystallogr Commun. 2019 Apr 25;75(Pt 5):680-684. doi: 10.1107/S2056989019005267. eCollection 2019 May 1.

Authors

Hiba Sehimi^{1

2}, Takashiro Akitsu³, Mohamed Faouzi Zid¹

Affiliations

¹ University of Tunis El Manar, Faculty of Sciences of Tunis, Laboratory of Materials, Crystal Chemistry and Applied Thermodynamics, 2092 El Manar II, Tunis, Tunisia.
² University of Gabes, Faculty of Sciences of Gabes, Erriadh Zrig City, 6072, Gabes, Tunisia.
³ Department of Chemistry, Faculty of Science, Tokyo University of Science, 1-3, Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.

Abstract

Crystals of the title compound, (C₅H₈N₃)₃[VO₂(C₂O₄)₂]·2.5H₂O, a mononuclear V^V complex, were obtained by slow evaporation at room temperature of an aqueous solution containing vanadium pentoxide, oxalic acid and 2,6-di-amino-pyridine. The asymmetric unit contains one bis-(oxalato)dioxovanadate(V) anionic complex, three 2,6-di-amino-pyridinium cations and two and a half uncoordinated water mol-ecules. The mononuclear vanadium(V) anions are connected to the organic cations and water mol-ecules through a strong N-H⋯O and O-H⋯O hydrogen-bond network, consolidated by π-π stacking inter-actions, to form a three-dimensional structure.

Keywords: 2,6-diaminopyridine; bis(oxalato) complexes; crystal structure; dioxovanadate(V); vanadium.

Grants and funding

This work was funded by Ministère de l’Enseignement Supérieur et de la Recherche Scientifique grant .