Abstract
The title compound, poly[(μ2-hydrazine)(μ4-phosphato)iron(III)], [Fe(PO4)(N2H4)] n , was prepared under hydro-thermal conditions. Its asymmetric unit contains one Fe(III) atom located on an inversion centre, one P atom located on a twofold rotation axis, and two O, one N and two H atoms located on general positions. The Fe(III) atom is bound to four O atoms of symmetry-related PO4 tetra-hedra and to two N atoms of two symmetry-related hydrazine ligands, resulting in a slightly distorted FeO4N2 octa-hedron. The crystal structure consists of a three-dimensional hydrazine/iron phoshate framework whereby each PO4 tetra-hedron bridges four Fe(III) atoms and each hydrazine ligand bridges two Fe(III) atoms. The H atoms of the hydrazine ligands are also involved in moderate N-H⋯O hydrogen bonding with phosphate O atoms. The crystal structure is isotypic with the sulfates [Co(SO4)(N2H4)] and [Mn(SO4)(N2H4)].
Highlights
Laboratoire de Réactivité et Chimie des Solides (LRCS), Université de Picardie Jules Verne, CNRS UMR 7314, 33 rue Saint
The FeIII atom is bound to four O atoms of symmetry-related PO4 tetrahedra and to two N atoms of two symmetry-related hydrazine ligands, resulting in a slightly distorted FeO4N2 octahedron
The H atoms of the hydrazine ligands are involved in moderate N—H O hydrogen bonding with phosphate O atoms
Summary
Transition metal phosphates have been studied intensively for their rich crystal- and magneto-chemistry (Kabbour et al, 2012), and for their various potential applications. Plastics but may be applied as catalysts, fertilizers and magnetic devices (Erskine et al, 1944; Bridger et al, 1962; Barros et al, 2006; Ramajo et al, 2009). It was demonstrated by Goodenough and co-workers that in electrodes the presence of PO4 groups results in higher positive potentials (Padhi et al, 1997), leading to an intensive research on LiFePO4, one of the most promising materials for the new generation of Li batteries (Ouvrard et al, 2013)
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