A computational analysis of the apparent nido vs. hypho conflict: are we dealing with six- or eight-vertex open-face diheteroboranes?

A computational analysis of the apparent nido vs. hypho conflict: are we dealing with six- or eight-vertex open-face diheteroboranes?
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对明显的 nido 与 hypho 冲突的计算分析:我们正在处理六顶点还是八顶点的开放面二杂硼烷?

DOI:
10.1039/c5dt01460c
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发表时间:
2015
期刊:
2003)
影响因子:
--
通讯作者:
Nunes JP
Nunes JP
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--
文献类型:
--
作者:
Nunes JP

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已经进行了一系列的计算研究,以调查的电子结构和键合方案的六个杂取代硼烷笼,所有这些都已在文献中提出的潜在的hypo结构。这六种物质是hypho-7,8-[C2 B6 H13]−(1a)、hypho-7,8-[CSB 6 H11]−(1b)、hypho-7,8-[S2 B6 H9]−(1c)、hypho-7,8-[NSB 6 H11](1d)、exo-7-Me-hypho-7,8-[NCB 6 H12](1 e)和endo-7-Me-hypho-7,8-[NCB 6 H12](1f),并且所谓的mno规则已应用于它们中的每一种。由于没有已知的carbathia-,azathia-,和dithahexaboranes的结构数据,我们还应用了从头算/GIAO/NMR结构工具1b-1d,与1c已为此目的而准备。我们的结论是,mno计数为10意味着1a,1b,1d,1 e和1f应该被称为伪nido或伪hypho。只有1c可以被正确地称为hypho-7,8-[S2 B6 H9]−。
A series of computational studies have been undertaken to investigate the electronic structures and bonding schemes for six hetero-substituted borane cages, all of which have been presented in the literature as potential hypho structures. The six species are hypho-7,8-[C2B6H13]− (1a), hypho-7,8-[CSB6H11]− (1b), hypho-7,8-[S2B6H9]− (1c), hypho-7,8-[NSB6H11] (1d), exo-7-Me-hypho-7,8-[NCB6H12] (1e), and endo-7-Me-hypho-7,8-[NCB6H12] (1f) and the so-called mno rule has been applied to each of them. As no structural data are known for the carbathia-, azathia-, and dithiahexaboranes, we have also applied the ab initio/GIAO/NMR structural tool for 1b–1d, with 1c having been prepared for this purpose. We conclude that an mno count of 10 means that 1a, 1b, 1d, 1e, and 1f should be termed pseudo-nido or pseudo-hypho. Only 1c can be considered to be correctly termed hypho-7,8-[S2B6H9]−.
第一个簇氮杂硫硼烷:八顶点 hypho-7,8-NSB6H11 和十顶点 arachno-6,9-NSB8H11 的分离和表征
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