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Is the Fukui Function a Right Descriptor of Hard-Hard Interactions?

机译:Fukui函数是硬性互动的正确描述吗?

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摘要

To verify whether the maximum or the minimum Fukui function site is better for protonation reactions or an altogether different local reactivity descriptor, viz., the charge is necessary, we calculate the Fukui functions (using a finite-difference approximation as well as a frozen-core approximation) and charges (Mulliken, Hirshfeld, and natural population analysis schemes) of several hydroxylamine derivatives, their sulfur-containing variants, and amino acids using B3LYP/6-311G(d,p) technique. While the Fukui functions provide the wrong selectivity criterion for hard-hard interactions, the charges are found to be more reliable, vindicating Klopman's idea. It is transparent from the present results that the hard-hard interactions are better explained in terms of charges, whereas the Fukui functions can properly account for soft-soft interactions known to be frontier-controlled.
机译:为了验证最大或最小Fukui函数位点对于质子化反应还是完全不同的局部反应性描述符(即电荷是必要的)更好,我们计算了Fukui函数(使用有限差分近似以及冷冻-核心近似)和使用B3LYP / 6-311G(d,p)技术的几种羟胺衍生物,其含硫变体和氨基酸的电荷(穆尔肯,赫希菲尔德和自然种群分析方案)。尽管Fukui函数为硬硬相互作用提供了错误的选择性标准,但发现电荷更可靠,证明了Klopman的想法。从目前的结果可以看出,可以用费用更好地解释硬对硬的交互作用,而Fukui函数可以适当地解释已知为边疆控制的软软交互。

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