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首页> 外文期刊>Zeitschrift fur Naturforschung, B. A Journal of Chemical Sciences >Sind Metalloprotonencryptanden - DFT-Studie zur Protonenaffinitat von [2.2.2]-analogen Metallocryptanden
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Sind Metalloprotonencryptanden - DFT-Studie zur Protonenaffinitat von [2.2.2]-analogen Metallocryptanden

机译:是金属质子体-DFT研究[2.2.2]-模拟金属质子的质子亲和力

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摘要

Based on density functional calculations (RB3LYP/LANL2DZp) the bicyclic metallocryptand [Pd_3(L~2)_2] [(L~2)~(3-): 1,1', 1"-nitrilotris(5,5-dimethylhexane-2,4-dione trianion)] shows the same high gas-phase basicity (-257.1 kcal mol~(-1) ) as Lehn's [2.2.2] cryptand (-254.4 kcal mol~(-1)) . This illustrates that the concept of metallotopomers adopted by Saalfrank et al. can be applied to design proton sponges as well as proton cryptands by metallosupramolecular coordination chemistry. The slightly higher gas-phase proton affinity of [Pd_3(L~2)_2] compared to [2.2.2] can be attributed to the smaller cavity in the metallotopomer.
机译:根据密度泛函计算(RB3LYP / LANL2DZp),双环金属链和[Pd_3(L〜2)_2] [(L〜2)〜(3-):1,1',1“-硝腈(5,5-二甲基己烷- [2,4-dione trianion]]显示出与Lehn's [2.2.2] cryptand(-254.4 kcal mol〜(-1))相同的高气相碱度(-257.1 kcal mol〜(-1))。 Saalfrank等人采用的金属拓扑异构体的概念可以应用于通过金属超分子配位化学设计质子海绵以及质子隐窝,[Pd_3(L〜2)_2]的气相质子亲和力比[2.2]高。 [2]可归因于金属拓扑异构体中较小的空腔。

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