Tetra(n-butyl)ammonium salt of a ferrimagnetic complex based on mixed-valent dinuclear ruthenium pivalate and octacyanidotungstate(V)
Abstract
A tetra (n-butyl)ammonium (n-Bu4N+) salt of Ru2–W complex consisting of dinuclear ruthenium (II,III) pivalate, ([RuIIRuIII(piv)4]+) (Hpiv = pivalic acid), and octacyanidotungstate(V), [n-Bu4N][{RuIIRuIII(piv)4}2(H2O){WV(CN)8}] (1), was synthesized and characterized by elemental analysis, infrared spectra, and temperature dependence of magnetic susceptibilities (2–300 K). The crystal structure of 1 revealed a zigzag one-dimensional chain molecule along the c axis with alternating arrangement of [RuIIRuIII(piv)4]+ and [WV(CN)8]3−, where another [RuIIRuIII(piv)4]+ unit is dangled from the [WV(CN)8]3− moiety. The magnetic susceptibilities and zero-field-cooled and field-cooled magnetization data showed that the present complex is ferrimagnetic with a Tc value of 5.5 K. The field dependence of magnetization exhibited a hysteresis with a coercive field of 150 Oe at 2 K.
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