A series of spin transition (ST) iron(II) compounds of the type [FeIIL2](X)2·S}2 (where L is 4′-(4‴-cyanophenyl)-1,2′:6′1″-bispyrazolylpyridine, X = ClO4− or BF4−, and S is acetonitrile) was synthesized and magnetically investigated. The effects of the removal of the lattice-solvent molecules and of their different positions relative to the iron(II) cations on the ST process were investigated. Crystallization
一系列自旋跃迁(英石)类型为[Fe II L 2 ](X)2 · S } 2的铁(II)化合物(其中L为4'-(4‴-氰基苯基)-1,2':6'1“-双吡唑基吡啶, X = CLO 4 -或BF 4 - ,和小号是乙腈)进行了合成和磁性研究。去除晶格的效果-溶剂分子及其相对于铁的不同位置(II)阳离子 对ST工艺进行了调查。 结晶产生组成为[Fe II(L)2 ](ClO 4)2 · S } 2的橙色嵌段(A·S} 2)晶体,以及两种化学计量为[Fe II(L)2 ]的多晶型化合物( BF 4)2 · S } 2为红色棺材(B·S} 2)和橙色块状(C·S} 2)晶体。Fe·N键距为A·S} 2(从1.921(9)到1.992(3)Å;在150 K时),B·S} 2(从1.943(2)到2.017(2)Å;在180 K下)和C·S} 2(从1.883(3)到1.962(3)Å;在180