The Synthesis and Characterization of Two-Dimensional Ferromagnetic Extended Structures Containing High-Spin (S = 5/2) and Low-Spin (S = 1/2)

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• 作者：Nazzareno Re ; Raffaella Crescenzi ; Carlo Floriani ; Hitoshi Miyasaka ; and Naohide Matsumoto
• 刊名：Inorganic Chemistry
• 出版年：1998
• 出版时间：June 1, 1998
• 年：1998
• 卷：37
• 期：11
• 页码：2717 - 2722
• 全文大小：115K
• 年卷期：v.37,no.11(June 1, 1998)
• ISSN：1520-510X

文摘

The reaction of [Fe(salen)]⁺ and{A₃[Fe(CN)₆]} (A =NEt₄, K), depending on the countercation A⁺and on thereaction solvent, led to[(NEt₄){Fe(salen)}₂{Fe(CN)₆}]_n,4, and[{Fe(salen)}₃{Fe(CN)₆}(MeOH)₂]_n·3nH₂O,5 [NEt₄= tetraethylammonium cation, salen = N,N'-ethylenebis(salicylideneiminato) dianion],displaying a similar extended2D structure. Complex 5 crystallizes in the monoclinic,space group P2₁/n, a =13.495(7) Å, b = 14.220(9) Å,c = 33.137(5) Å, = 96.74(2), andZ = 4. It assumes a two-dimensional network layerstructure consisting ofcyclic octanuclear [-Fe(h.s.)-NC-Fe(l.s.)-CN-]₄units with [Fe(salen)(MeOH)₂]⁺located between the interlayer asa countercation. Complex 4 exhibits a metamagneticbehavior with a field-induced transition from anantiferromagnetic to a ferromagnetic-like state and a Neel temperatureof ca. 6 K.