Synthesis, structure and physical properties of a low dimensional compound

The crystal structure of (mu(3)-oxo)hexakis(cyanoacetato-kappa O,O')(cyanoacetato-kappa O)diaquatriiron(III) cyanoacetic acid shows the formation of trinuclear complexes in a hydrogen-bond network that bonds all the molecules in a 3D arrangement For this complex, within whose clusters the whole magnetic interaction takes place, Fe-57 Mossbauer spectroscopy shows that the Fe cations are in the S = 5/2 state in the temperature range 2-295 K. The asymmetric broadening of the absorption peaks below 80 K is consistent with strong antiferromagnetic interactions between the metal spins. The magnetization measurements also show the antiferromagnetic character of the spin ensemble and an S-T = 1/2 magnetic ground state typical of triangular systems with similar J between Fe-Fe pairs. (C) 2016 Elsevier B.V. All rights reserved.