High-spin .dblharw. low-spin transition in hexacoordinate complexes of iron(II) with monodentate 1-alkyltetrazole ligands: a variable-temperature Moessbauer, magnetic susceptibility, and far-infrared study
High-spin .dblharw. low-spin transition in hexacoordinate complexes of iron(II) with monodentate 1-alkyltetrazole ligands: a variable-temperature Moessbauer, magnetic susceptibility, and far-infrared study
复制标题
高旋转.dblharw。
DOI：
10.1021/ic00156a027
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发表时间：
1983
影响因子：
4.6
通讯作者：
P. Guetlich
中科院分区：
文献类型：
--
作者：
E. W. Mueller;J. Ensling;H. Spiering;P. Guetlich
C2H5(Etz)，n-C3H7(PTZ)和j‘-C3H7(Iptz)已被合成，并在初步研究中发现经历了依赖温度的高自旋(5T2)-低自旋(’AJ)转变。我们用穆斯堡尔谱、磁化率和变温下的远红外光谱对自旋转变行为进行了更详细的表征。PTZ络合物中的自旋相变导致了铁中心附近的结构重新排序的一级相变。同样的现象也发生在锌稀释的混合晶体中。在MTZ、ETZ和IPTZ中也发生了依赖于温度的自旋转变，但似乎更渐进和不完整；从目前的研究来看，没有迹象表明存在结构相变。
C2H5 (etz), n-C3H7 (ptz), and j'-C3H7 (iptz), have been synthesized earlier and found in preliminary studiesto undergo a temperature-dependent high-spin (5T2)— low-spin (’AJ transition. We reporthere on a more detailed characterization of the spin transition behavior using Mossbauer, magnetic susceptibility, and far-infrared spectroscopy at variable temperatures. The spin transition in the ptz complex induces a first-order phase transition with structural reordering in the vicinity of the iron center. The same phenomenon occurs in a zinc-diluted mixed crystal. A temperature-dependentspin transition also occurs in the mtz, etz, and iptz complexes but appears to be more gradual and incomplete; from the present studies there is no indication of a structural phase transition.