首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Investigation of the two-step spin crossover complex Fe[5-NO2-sal-(1,4,7,10)] using density functional theory
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Investigation of the two-step spin crossover complex Fe[5-NO2-sal-(1,4,7,10)] using density functional theory

机译:利用密度泛函理论研究两步自旋交联络合物Fe [5-NO2-sal-(1,4,7,10)]

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摘要

A quantum chemical study of the Fe[5-NO2-sal-(1,4,7,10)] ((1,10-bis(5-nitrosalicylaldehyde)-1,4,7,10-tetra-ezdecane-O,O',N,N',N' ',N' '')iron(II)) molecule was performed using density functional theory (DFT). Starting from the different X-ray crystallographic structures, geometry optimizations have been performed. These calculations confirmed the conformational isomerism of this complex in each spin states of the molecule ((1)A(1g) and T-5(2g)). Each employed DFT method (B3LYP, B3LYP*, BP86, HCTH407) reproduced correctly the structural differences between the two calculated conformers when compared to the experimental structures. Furthermore, electronic polarizabilities have been calculated in each spin state and for each conformer. These calculations revealed a higher polarizability in the singlet state in agreement with the measured higher dielectric constant in this state.
机译:Fe [5-NO2-sal-(1,4,7,10)]((1,10-双(5-硝基水杨醛)-1,4,7,10-四癸烷-O的量子化学研究使用密度泛函理论(DFT)进行O,N,N,N',N',N''')铁(II))分子的研究。从不同的X射线晶体学结构开始,已经进行了几何优化。这些计算证实了该复合物在分子的每个自旋态((1)A(1g)和T-5(2g))中的构象异构现象。与实验结构相比,每种采用的DFT方法(B3LYP,B3LYP *,BP86,HCTH407)都能正确再现两个计算的构象异构体之间的结构差异。此外,已经在每个自旋状态和每个构象异构体计算了电子极化率。这些计算表明,在单重态下具有较高的极化率,与在此状态下测得的较高介电常数相符。

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