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稀土二四离子桥接胺酸复合物

Peng-Bo Jin¹, Qian-Cheng Luo¹, Gemma K Gransbury²

¹Frontier Institute of Science and Technology, State Key Laboratory of Electrical Insulation and Power Equipment, MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter, Xi'an Key Laboratory of Electronic Devices and Materials Chemistry and School of Chemistry, Xi'an Jiaotong University 99 Yanxiang Road Xi'an Shaanxi 710054 P. R. China zheng.yanzhen@xjtu.edu.cn.

Chemical science

|December 26, 2024

概括

合成了新的稀土逆烯复合物,其中包括四基桥. 这些复合物表现出独特的电子结构和结合相互作用,在氧化还原化学中具有潜在的应用.

科学领域:

有机金属化学有机金属化学
稀土化学稀土化学
协调化学协调化学

背景情况:

反向烯复合体具有独特的电子特性.
稀土元素提供了不同的协调环境.
二甲是一种新的桥接联体.

研究的目的:

合成和描述新型的二甲基四氨基基桥接稀土逆氨基胺酸复合物.
研究这些新化合物的电子结构和结合.
探索这些复合物的反应性和磁性特性.

主要方法:

通过减少Ln(iii) 前体的合成或与Ln(ii) 复合体和KC8.8反应.
使用单晶X射线衍射,元素分析,SQUID磁力测量,UV对NIR,ATR-IR和NMR光谱学进行表征.
计算研究包括密度函数理论 (DFT) 和初始计算.

主要成果:

成功合成了Ln = Gd,Tb,Dy,Y. 的[{Ln(κ1:η6-Piso) }2(μ-η6:η6-C6H6) ] (2-Ln) 复合体.
作为2-Y的四电子还原剂的反应性已被证明.
DFT计算显示了强大的Y-(C6H6) 4- δ结合相互作用.
在2-Tb中有强大的分子间反铁磁合的证据,并在2-Gd中确定了交换合.

结论:

合成的复合物具有Ln(iii) 中心在一个顶的反向三明治配置内.
强大的金属-烯结合相互作用是这些复合物的关键特征.
这些复合体显示出有趣的磁性和氧化还原活性.

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