The μ-oxo dinuclear complex {Fe 2 O(tptz) 2 [N(CN) 2 ] 2 (NO 3 ) 2 } (1) (where tptz=2,4,6-tris(2-pyridyl)-1,3,5-triazine) has been synthesised and characterised by elemental analysis, FT-IR, UV–vis, cyclic voltammetry, Mössbauer spectroscopy, and variable-temperature magnetic susceptibility measurements and single crystal X-ray diffraction. The iron centres have a pentagonal-bipyramidal geometry. The dimeric neutral complex exhibits typical Fe-μ-O bond lengths of 1.763(1)Å and a bridge angle of 180.00°. The Fe⋯Fe separation is 3.526(3)Å. The Mössbauer spectrum at room temperature consists of one quadrupole doublet with an isomer shift of 0.41mm/s and a quadrupole splitting of 1.12mm/s. Variable-temperature magnetic susceptibility measurements have been measured in the temperature range 300–2K, revealing an intramolecular antiferromagnetic coupling (J=−211.6cm −1 ).