Acta Crystallographica Section E

Structure Reports Online

Volume 64, Part 1 (January 2008)

metal-organic compounds

tk2214 scheme

Acta Cryst. (2008). E64, m1 [ doi:10.1107/S1600536807061673 ]

{Tris[2-(imidazol-2-ylmethylimino)ethyl]methylammonium}iron(II) tris(perchlorate) dihydrate

G. A. Brewer, J. P. Jasinski and R. J. Butcher

Abstract: The title complex, [Fe(C₁₉H₂₇N₁₀)](ClO₄)₃·2H₂O, is a new polymorph of an iron(II) Schiff base complex of tris(2-aminoethyl)methylammonium with imidazole-2-carboxaldehyde. The octahedral Fe^II atom is bound to three facial imidazole N atoms with average Fe-N_imidazole and Fe-N_imine bond distances of 1.963 (5) and 1.951 (5) Å, respectively. The central N atom of the tripodal ligand is outside the bonding distance at 3.92 Å. The crystal packing is stabilized by the hydrogen-bonding interactions between the two water molecules (acceptor) and two of the three imidazole NH groups (donor). The third imidazole NH group (donor) forms a hydrogen bond to one of the three perchlorate counter-ions (acceptor).