An unprecedented homochiral mixed-valence spin-crossover compound.
An unprecedented homochiral mixed-valence spin-crossover compound.
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DOI：
10.1002/anie.200250399
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发表时间：
2003-04
影响因子：
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通讯作者：
Y. Sunatsuki;Yuichi Ikuta;N. Matsumoto;Hiromi Ohta;M. Kojima;S. Iijima;S. Hayami;Y. Maeda;S. Kaizaki;F. Dahan;J. Tuchagues
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文献类型：
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作者：
Y. Sunatsuki;Yuichi Ikuta;N. Matsumoto;Hiromi Ohta;M. Kojima;S. Iijima;S. Hayami;Y. Maeda;S. Kaizaki;F. Dahan;J. Tuchagues
安吉街1615号国际化学版2003，42，1614-1618 www. angewandte。org 2003 Wiley-VCH Verlag GmbH & Co. KGaA，魏因海姆等，其产生手性（聚集）晶体。从选定晶体获得的对映体圆二色性（CD）光谱提供了自发拆分发生的明确证据（图3）。质子化[FeIIH 3L] 2+离子（Fe 2和Fe 4）在295 K时的Fe 3 N键长范围为2.146（2）至2.210（2），这是HS Fe II中心的典型值，而在100 K时的Fe 3 N键长范围为2.019（2）至2.044（2），更典型的是LS Fe II离子。在去质子化的[FeIIIL]物种（Fe 1和Fe 3）中，Fe 3 N键长在295 K时为1.974（2）至2.023（2），在100 K时为1.926（2）至1.996（2），这两个都暗示LS FeIII物种。图2b示出了存在两种类型的平坦层：一层仅包含[FeIIH 3L] 2+物质（Fe 2和Fe 4），另一层仅包含[FeIIIL]物质（Fe 1和Fe 3），两层沿c轴沿着交替堆叠。
1615 Angew. Chem. Int. Ed. 2003, 42, 1614–1618 www. angewandte. org 2003 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim other, which results in a chiral (conglomerate) crystal. Enantiomeric circular dichroism (CD) spectra obtained from selected crystals provide definitive evidence that spontaneous resolution has occurred (Figure 3). The FeÀN bond lengths for the protonated [FeIIH3L] 2+ species (Fe2 and Fe4) at 295K range from 2.146 (2) to 2.210 (2), which are typical values for HS FeII centers, while those at 100 K range from 2.019 (2) to 2.044 (2), more typical for LS FeII ions. In the deprotonated [FeIIIL] species (Fe1 and Fe3), the FeÀN bond lengths are in the range 1.974 (2) to 2.023 (2) at 295 K, and 1.926 (2) to 1.996 (2) at 100 K, both suggestive of LS FeIII species. Figure 2b illustrates that there are two types of flat layers: One layer contains only [FeIIH3L] 2+ species (Fe2 and Fe4), the other layer contains only [FeIIIL] species (Fe1 and Fe3), with both layers stacked alternately along the c axis.