CRYSTAL STRUCTURE AND MAGNETIC PROPERTIES OF HETEROTRINUCLEAR COMPLEX, (CUTREN)2FE(CN)6 · 12H2O

A heterotrinuclear complex, (Cutren)2Fe(CN)6 · 12H2O, was synthesised and its crystal structure solved by direct methods. Crystal data are: C18H60N14Cu2FeO12, M = 847.7, monoclinic, space group: P21/c, a = 13.568(5), b = 10.100(3), c = 13.935(6) A, μ = 95.50(4)°, V = 1901(1) A3, Z − 2. D x = 1.48 gem−3, final R = 0.039 and Rω = 0.049. The crystal structure shows that the complex is composed of two (Cutren) and one hexacyanometallate Fe(CN)6 subunits. Bridging cyano C(l) — N(l) is 1.148(4) A, which is shorter than non-bridging (1.155(4) A and 1.164(4) A). Magnetic properties of (Cutren)2Fe(CN)6 indicate weak ferromagnetic exchange over the temperature range of 6.2–37K.