η2-Arene Binding at High-Spin Fe(I) Enabled by a Sterically Accommodating Tris(pyrazolyl)hydroborate Ligand,Organometallics

当前位置： X-MOL 学术 › Organometallics › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

η2-Arene Binding at High-Spin Fe(I) Enabled by a Sterically Accommodating Tris(pyrazolyl)hydroborate Ligand
Organometallics ( IF 2.5 ) Pub Date : 2020-06-30 , DOI: 10.1021/acs.organomet.0c00340
Laura A. Essex ₁ , Alex McSkimming ₁ , Niklas B. Thompson ₂ , Margaret L. Kelty ₃ , Ethan A. Hill ₃ , W. Hill Harman ₁

Affiliation

Transition-metal arene complexes are important species in catalysis and arene functionalization. Certain electron-rich metal fragments are capable of binding arenes across two adjacent carbon atoms, inducing significant dearomatization through strong back-bonding interactions. Such complexes generally adopt low-spin, closed-shell configurations with electronic and coordinative saturation. Herein, we report an asymmetric tris(pyrazolyl)hydroborate (Tp) ligand and its Fe(I) fragment, which forms η² complexes with a range of arenes and heteroarenes, including benzene, trifluoromethylbenzene, naphthalene, anthracene, and furan. X-band EPR and solution magnetometry definitively establish these complexes as high spin (S = 3/2), owing to the relatively weak ligand field provided by Tp. These compounds expand a small but growing family of complexes that feature strongly back-bonding metal fragments in high-spin configurations.

中文翻译：

η ² -Arene绑定在由空间位容纳三（吡唑基）硼氢化配体启用高自旋的Fe（I）

过渡金属芳烃络合物是催化和芳烃功能化的重要物质。某些富电子的金属片段能够结合两个相邻碳原子上的芳烃，通过强的反向键相互作用引起显着的脱芳构作用。这样的复合体通常采用具有电子和协调饱和的低旋转，闭壳配置。在此，我们报告一个非对称的三（吡唑基）硼氢化（TP）配体和它的铁（I）片段，其形式η ^2种配合物的范围内的芳烃和杂芳烃，包括苯，三氟甲基苯，萘，蒽，和呋喃的。X波段EPR和溶液磁力测定法将这些络合物确定为高自旋（S= 3/2），这是由于Tp提供的相对较弱的配体场。这些化合物扩展了一个小的但正在增长的络合物家族，这些络合物在高旋转构型中具有强力的反向结合金属片段。

更新日期：2020-07-13

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11