Acta Cryst. (2002). E58, m10-m12  [ doi:10.1107/S1600536801020542 ]

-Oxo-bis{chloro[N,N'-dimethyl-N,N'-bis(2-pyridylmethyl)ethane-1,2-diamine]iron(III)} diperchlorate 0.751-hydrate

R. K. Egdal, A. Hazell and C. J. McKenzie

Abstract: The title compound, -oxo-bis[bispicMe₂enFeCl](ClO₄)₂·0.751H₂O [bispicMe₂en = N,N'-dimethyl-N,N'-bis(2-pyridylmethyl)ethane-1,2-diamine] or [Fe₂Cl₂O(C₁₆H₂₂N₄)₂](ClO₄)₂·0.751H₂O, contains a complex dinuclear cation in which two Fe atoms are linked by a -oxo bridge. Each Fe atom is octahedrally coordinated by the bridging O atom, four N atoms of the bispicMe₂en ligand and a Cl atom. The FeFe distance is 3.623  (1)  Å; the Fe-O distances are 1.811  (1) and 1.814  (1)  Å; the Fe-N_pyridine distances vary between 2.156  (2) and 2.169  (2)  Å (mean value 2.163  Å) and are considerably shorter than the Fe-N_amine distances which fall into two categories, viz. Fe-N = 2.284  (2) and 2.296  (2)  Å for the N atoms trans to the bridging O atom, and 2.219  (2) and 2.227  (2)  Å for those trans to Cl. The Fe-Cl distances are 2.324  (1) and 2.334  (1)  Å. The geometry is compared to that in related complexes.

Online 8 December 2001

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