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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Strong electronic influence of equatorial ligands on frontier orbitals in paddlewheel dichromium(ii,ii) complexes
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Strong electronic influence of equatorial ligands on frontier orbitals in paddlewheel dichromium(ii,ii) complexes

机译:赤道配体对桨轮脱铬(II,II)复合物前轨道的强电子影响

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摘要

A series of substituted benzoate-bridged dichromium(II, II) complexes [Cr-2(RCO2)(4)(THF)(2)] ([Cr-2]), where RCO2- is substituted benzoate, was synthesized and its structural and magnetic properties were investigated. The orbital energies, as well as magnetic coupling energies, were also investigated using computational approaches. The HOMO/LUMO energy levels of the complexes are strongly dependent on the acidity, i.e., pK(a), of the corresponding benzoic acids (RCO2H), revealing a linear trend in the respective groups of non-ortho, mono-ortho, and bi-ortho substituted groups. The Cr center dot center dot center dot Cr magnetic coupling constant (E-S (T)) is little affected by pK(a); instead, the E-S (T) is associated with the HOMO/LUMO gap and strongly correlated with the Cr center dot center dot center dot Cr distance.
机译:一系列取代的苯甲酸桥桥桥铬(II,II)复合物[Cr-2(RCO2)(4)(THF)(THF)(2)]([Cr-2]),其中RCO2-被取代的苯甲酸酯,合成及其 研究了结构和磁性。 使用计算方法还研究了轨道能量以及磁耦合能量。 复合物的同性计/八孔能量水平强烈依赖于相应的苯甲酸(RCO2H)的酸度,即PK(A),揭示了各组非邻族,单邻和官能和的线性趋势 双邻替代的基团。 CR中心点中心点中心点CR CR磁耦合常数(E-S(T))受PK(A)的影响很少; 相反,E-S(t)与同性阀/灯泡间隙相关,并与CR中心点中心点中心点CR距离强烈相关。

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