...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Bulletin of the Chemical Society of Japan >Crystal Structures and Spectroscopic Characterization of Linear-Type-S-Bridged Trinuclear Complexes #DELTA##LAMBDA#- and #DELTA##DELTA#/#LAMBDA##LAMBDA#-[Re~III{Rh~III(aet)_3}_2]~(3+) (aet = 2-Aminoethanethiolate)
【24h】

Crystal Structures and Spectroscopic Characterization of Linear-Type-S-Bridged Trinuclear Complexes #DELTA##LAMBDA#- and #DELTA##DELTA#/#LAMBDA##LAMBDA#-[Re~III{Rh~III(aet)_3}_2]~(3+) (aet = 2-Aminoethanethiolate)

机译：线性S桥三核配合物＃DELTA ## LAMBDA＃-和＃DELTA ## DELTA＃/＃LAMBDA ## LAMBDA＃-[Re〜III {Rh〜III（aet）_3}的晶体结构和光谱表征_2]〜（3+）（aet = 2-Aminoethylthiothiolate）

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The reduction of an acidic mixture of fac(S)-[Rh~III(aet)_3] (aet = 2-aminoethanethiolate) and NH_4Re~(VII)O_4 gave the first linear-type S-bridged trinuclear xomplexes containing a d~4 metal ion, [Re~III {Rh~III(aet)_3}_2]~(3+). The meso (1a) and ra-cemic (1b) isomers were selecteively isolated by using HCl and HBr solutions, respectively, although both isomers were formed in each case. The crystal structures of 1aCl(ReO_4)_2 center dot 4H_2O and 1b(ClO_4)_3 were determined by X-ray crystallography. Both complex cations consist of two terminal fac(S)-[Rh~III(aet)_3] units and a central rhenium atom, which is situated in an octahedral environment with the Re~IIIS_6 chromophore. 1b were fairly stable in water, even under aerobic conditions, unlike in the case of previously reported [Mo~III{rH~iii(AET)_3}_2]~(3+). The Re(III) ion, which is incorporated into the S-bridged polynuclear structure, indicated a lower magnetic moment (1.32 #mu#_B for 1b) at room trmperature than the spin-only value for the d~4 electronic configuration. The ~1H and ~13C NMR spectra of 1a and 1b showed paramagnetic shifts compared with those of the corresponding diamagnetic complexes, [Co~III{Rh~III(aet)_3}_2]~(3+). 1a and 1b were also characterized on the basis of the IR and UV-vis absorption spectra and the molar conductivities.
机译：fac（S）-[Rh〜III（aet）_3]（aet = 2-氨基乙烷硫醇盐）和NH_4Re〜（VII）O_4的酸性混合物的还原得到第一个线性的，带有ad〜4的S型桥连的三核xomplex。金属离子[Re〜III {Rh〜III（aet）_3} _2]〜（3+）。尽管分别形成了两种异构体，但分别使用HCl和HBr溶液选择性地分离了内消旋（1a）和镭（1b）异构体。通过X射线晶体学测定1aCl（ReO_4）_2中心点4H_2O和1b（ClO_4）_3的晶体结构。两种络合阳离子均由两个末端fac（S）-[Rh〜III（aet）_3]单元和一个中央rh原子组成，该中心atom原子与Re〜IIIS_6生色团位于八面体环境中。 1b在水中甚至在有氧条件下也相当稳定，这与先前报道的[Mo〜III {rH〜iii（AET）_3} _2]〜（3+）情况不同。掺入S桥多核结构中的Re（III）离子在室温下的磁矩（对于1b为1.32＃mu＃_B）比d〜4电子构型的仅自旋值低。 1a和1b的〜1H和〜13C NMR谱显示出与相应的抗磁性配合物[Co〜III {Rh〜III（aet）_3} _2]〜（3+）相比的顺磁位移。还基于IR和UV-可见吸收光谱以及摩尔电导率来表征图1a和1b。

著录项

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号