Structural and Electronic Properties of Iron(0) PNP Pincer Complexes.

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Accounts of Chemical Research Pub Date : 2021-07-27 Epub Date: 2021-05-04 DOI:10.1002/zaac.202100015
Mathias Glatz, Nikolaus Gorgas, Berthold Stöger, Ernst Pittenauer, Liliana Ferreira, Luis F Veiros, Maria José Calhorda, Karl Kirchner
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Abstract

In the present work we have prepared and fully characterized several Fe(0) complexes of the type [Fe(PNP)(CO)2] treating Fe(II) complexes [Fe(PNP)(Cl)2] with KC8 in the presence of carbon monoxide. While complexes [Fe(PNPNMe-iPr)(CO)2], [Fe(PNPNEt-iPr)(CO)2] adopt a trigonal bipyramidal geometry, the bulkier and more electron rich [Fe(PNPNH-tBu)(CO)2] is closer to a square pyramidal geometry. Mössbauer spectra showed isomer shifts very close to 0 and similar to those reported for Fe(I) systems. Quadrupole splitting values range between 2.2 and 2.7 mm s-1 both in experiments and DFT calculations, while those of Fe(I) complexes are much smaller (∼0.6 mm s-1).

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铁(0)PNP 钳形配合物的结构和电子特性。
在本研究中,我们用 KC8 在一氧化碳存在下制备了几种[Fe(PNP)(CO)2]类型的 Fe(0) 复合物,并对其进行了全面表征,这些复合物处理了 Fe(II) 复合物[Fe(PNP)(Cl)2]。复合物[Fe(PNPNMe-iPr)(CO)2]和[Fe(PNPNEt-iPr)(CO)2]采用三叉双锥几何结构,而体积更大、电子更丰富的[Fe(PNPNH-tBu)(CO)2]则更接近于方形金字塔几何结构。摩斯鲍尔光谱显示出非常接近于 0 的异构体偏移,与报告的 Fe(I) 系统的异构体偏移相似。实验和 DFT 计算得出的四极分裂值介于 2.2 和 2.7 mm s-1 之间,而 Fe(I) 复合物的四极分裂值要小得多(∼0.6 mm s-1)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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