Crystal structure and magnetic properties of (tris-{4-[1-(2-meth-oxy-eth-yl)imidazol-2-yl]-3-aza-but-3-enyl}amine)-iron(II) bis-(hexa-fluorido-phosphate).

In the complex cation of the title compound, Fe(CHNO), the tripodal tris-{4-[1-(2-meth-oxy-eth-yl)imidazol-2-yl]-3-aza-but-3-en-yl}amine ligand is coordinated to an Fe ion through the nitro-gen atoms of three imidazole and three imino groups. The Fe atom exhibits a distorted octa-hedral geometry. In the crystal, l and d anti-podes are arranged in layers in the plane. Weak C⋯F and C-H⋯F/O contacts exist between the ligands of the complex cation and the PF anions, generating a three-dimensional network. At 120 K, the Fe ion is in a low-spin state, with an average Fe-N bond distance of 1.970 (2) Å. On heating, the Fe ion converts to the high-spin state, as demonstrated by magnetic susceptibility measurements.