Bis(2,3,5,6-tetra-2-pyridylpyrazine-κ3N2,N1,N6)iron(II) bis(dicyanamidate) 4.5-hydrate

Abstract

In the title compound, [Fe(C24H16N6)2][N(CN)2]2·4.5H2O, the central iron(II) ion is hexacoordinated by six N atoms of two tridentate 2,3,5,6-tetra-2-pyridylpyrazine (tppz) ligands. Two dicyanamide anions [dca or N(CN)2−] act as counter-ions, and 4.5 water molecules act as solvation agents. The structure contains isolated cationic iron(II)–tppz complexes and the final neutrality is obtained with the two dicyanamide anions. One of the dicyanamide anions and a water molecule are disordered with an occupancy ratio of 0.614 (8):0.386 (8). O—H...O, O—H...N and C—H...O hydrogen bonds involving dca, water and tppz molecules are observed.