A New Bimetallic Intercalated 3-D Assembly Magnet [{(323)Ni}₃{Fe^III(CN)₆}₂]<i>_n</i>·12<i>n</i>H₂O (323 = <i>N</i>,<i>N</i>‘-Bis(3-aminopropyl) Ethylenediamine): An Unprecedented Concomitant Presence of Meridional and Facial Arrangment of Ferricyanide Anion

Abstract

A novel molecular based magnet of three-dimensional (3-D) cyanide-bridged bimetallic assembly, [{(323)Ni}3{FeIII(CN)6}2]n x 2nH2O where 323 = N,N'-bis(3-aminopropyl) ethylenediamine, was synthesized and structurally characterized. The compound crystallizes in the orthorhombic space group Pbca with a = 15.6560 A, b = 15.2910 A, c = 50.9120 A, and Z = 8. The assembly has two intercalated 3-D networks created by FeIII-CN-NiII-NC-FeIII linkages. The ferricyanide anion adopts both facial and meridional arrangements through the linkage. Interesting magnetic properties including 3-dimensional magnetic ordering were revealed. The assembly displays 3-dimensional magnetic ordering below 5.2 +/- 0.1 K and field-induced magnetic behavior below 5.1 +/- 0.1 K and above 1.15 +/-0.05 kOe.