Structure and magnetic properties of THE pentanuclear complex [Fe2(CN)12Ni3(L)6]·27H2O, where L is nitronyl nitroxide
H. Higashikawa, K. Inoue, K.YU. Maryunina, G.V. Romanenko, A.S. Bogomyakov, O.V. Kuznetsova, E.YU. Fursova, V.I. Ovcharenko
Keywords: nickel, iron, cyano bridge, nitroxide, pentanuclear complex, crystal structure, magnetic properties
Pages: 1209-1212
Abstract
We succeeded in synthesizing a new high-spin complex [Fe2(CN)12Ni3(L)6]·27H2O, where L is stable nitroxide 2-(imidazol-4-yl)-4,4,5,5-tetramethyl-2-imidazoline-3-oxide-1-oxyl. According to X-ray diffraction data, the metal core of the pentanuclear [Fe2(CN)12Ni3(L)6] molecule is a trigonal bipyramid with Fe atoms occupying the axial positions and linked via CN bridges to {NiL2} fragments laying in the equatorial plane. A peculiarity of this coordination compound is a large number of water molecules per the [Fe2(CN)12Ni3(L)6] pentanuclear molecule in the structure. The complex character of the μeff(T) dependence points to many competing channels of exchange interactions between the three types of paramagnetic centers.
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