Magnetic Properties of a One-Dimensional Ferromagnet Containing a Mn(III)−NC−Fe(III) Linkage: Synthesis and Crystal Structure of a Chainlike [Mn(acacen)Fe(CN)6]n2n- Polyanion
Magnetic Properties of a One-Dimensional Ferromagnet Containing a Mn(III)−NC−Fe(III) Linkage: Synthesis and Crystal Structure of a Chainlike [Mn(acacen)Fe(CN)6]n2n- Polyanion
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含有 Mn(III)−NC−Fe(III) 连接的一维铁磁体的磁性：链状 [Mn(acacen)Fe(CN)6]n2n- 聚阴离子的合成和晶体结构
DOI：
10.1021/ic960556g
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发表时间：
1996
影响因子：
4.6
通讯作者：
N. Matsumoto
中科院分区：
文献类型：
--
作者：
N. Re;E. Gallo;C. Floriani;H. Miyasaka;N. Matsumoto
通过[Mn(Acen)Cl]和[net4]3[Fe(CN)6]在乙醇/异丙醇中的组装反应，合成了一维化合物[Net_4]_2[Mn(Acen)][Fe(CN)_6](Net_4=四乙基铵，Acen=N，N‘-亚乙基双(乙酰乙酰亚氨基基))，其中[Net_4]_2[Mn(Acen)][Fe(CN)_6][Net_4]_3[Fe(CN)_6]为[−_4]_2[Mn(Acen)]_[Fe(CN)_6](Net_4)_2[Mn(Acen)][Fe(CN)_6](Net_4=四乙基铵，Acen=N，N’-亚乙基双(乙酰乙酰亚甲基)氨基)。该化合物属正交晶系Pnma，晶胞尺寸为a=152.6(5)A，b=19.79(1)A，c=11.471(4)A，Z=4。该化合物呈一维蛇形链状结构，由(−Mn−NC−Fe−CN−)n个重复单元组成，尺寸为Fe−C=1.952(4)A，Mn−N=2.316(4)A，Mn−N−C=1.952(3)°，Fe−C−N=2.316(4)°，其中Fe离子位于反转中心，[Mn(Acacen)]部分位于镜面上，相邻的一维链沿b轴呈蛇形排列，具有相同的相。随着温度的降低，每铁锰的有效磁矩从室温的5.05μB逐渐增加，然后突然低于约20K，增加到15.5K以下.
A one-dimensional compound with a Mn(III)−NC−Fe(III) linkage of the formula of [NEt4]2[Mn(acacen)][Fe(CN)6] (NEt4 = tetraethylammonium, acacen = N,N‘-ethylenebis(acetylacetonylideneaminato)) has been prepared by the assembly reaction of [Mn(acacen)Cl] and [NEt4]3[Fe(CN)6] in ethanol/2-propanol. The compound crystallizes in the orthorhombic space group Pnma with the cell dimensions of a = 17.415(5) A, b = 19.79(1) A, c = 11.471(4) A, and Z = 4. The compound assumes a one-dimensional snaky-chain structure consisting of (−Mn−NC−Fe−CN−)n repeating units with dimensions of Fe−C = 1.952(4) A, Mn−N = 2.316(4) A, Mn−N−C = 152.6(3)°, Fe−C−N = 177.1(4)°, in which the Fe ion is positioned at the inversion center, the [Mn(acacen)] moiety lies on a mirror plane, and the adjacent one-dimensional chains run like a snake along the b axis with the same phase. On lowering of the temperature, the effective magnetic moment per FeMn increases gradually from 5.05 μB at room temperature and then abruptly below ca. 20 K to 15.5 ...