Synthesis, Crystal Structure and Magnetic Property of a Cyano-Bridged Two-Dimensional Heterometallic Assembly (Mn(salen))2(Fe(CN)5NO) 2H2O

AbstractA cyano-bridged bimetallic assembly, [Mn III (salen)] 2 [Fe II (CN) 5 NO]·2H 2 O [salen = N,N′-1,2-ethylenebis(salicylideneiminato)dianion], has been prepared and characterized structurally and magnetically. It crystallizes in the tetragonal space group P4/ncc with a = b = 14.813(2) A, c = 17.093(5) A, V = 3750.6(13) A 3 , Z = 4. In this complex, each [Fe(CN) 5 NO] 2− unit connects four [Mn(salen)] + units with its four co-planar cyanide groups, and each [Mn(salen)] + unit is linked to two [Fe(CN) 5 NO] 2− ions in trans-form, which results in a two-dimensional (2-D) network consisting of pillow-like octanuclear [–Fe II –CN–Mn III –NC–] 4 units with dimensions: Fe–C = 1.943(3) A, C≡N– = 1.139(4) A, Mn–N = 2.326(3) A, Fe–C≡N = 178.0(3)°, Mn–N≡C = 161.7(3)°. The NO group of [Fe(CN) 5 NO] 2− remains monodentate and the bond angle of Fe–N–O is linear (180.0°). The variable temperature magnetic susceptibilities, measured in the 1.8–300 K range, show a weak Mn III ···Mn III antiferromagnetic interaction through the diamagnetic –NC–Fe II –CN– bridges.Graphical AbstractThe cyano-bridged 2-D assembly of [Mn III (salen)] 2 [Fe II (CN) 5 NO]·2H 2 O [salen = N,N′-1,2-ethylenebis(salicylideneiminato)dianion] have been synthesized and characterized by i.r., thermoanalysis, single crystal X-ray structure analysis and magnetic measurements.[IMAGE]