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Four-Coordinate Co(III) Imide with an Unusually Tilted Terminal Imido Ligand
Organometallics ( IF 2.5 ) Pub Date : 2024-01-12 , DOI: 10.1021/acs.organomet.3c00473
Li Gu 1 , Addison Fraker 1 , Niklas B Thompson 2 , Alex McSkimming 1
Affiliation  

We report herein the synthesis and characterization of a terminal Co(III) imido complex supported by an intermediate field N,N,C heteroscorpionate. This chemistry is enabled through the development of an additional member of this ligand type featuring Ph2(CH3)C– substituents, one of which weakly binds and stabilizes Co in the corresponding Co(I) precursor. The Co(III) imide is low-spin with no evidence for thermal population of open-shell excited states. Unusually, the imido ligand in this molecule tilts markedly toward the Calkyl donor. DFT calculations suggest this structural feature to be largely a result of strong Co–C covalency, underscoring the importance of M–C bonding in determining the (electronic) structure of metal centers supported by this class of ligand.

中文翻译:


具有异常倾斜末端亚氨基配体的四配位 Co(III) 酰亚胺



我们在此报道了由中间场 N,N,C 异蝎酸酯支持的末端 Co(III) 亚氨基配合物的合成和表征。这种化学反应是通过开发具有 Ph 2 (CH 3 )C– 取代基的配体类型的附加成员来实现的,其中一个取代基与相应 Co(I) 前体中的 Co 结合较弱并使其稳定。 Co(III) 酰亚胺是低自旋的,没有开壳层激发态热布居的证据。不同寻常的是,该分子中的酰亚胺配体明显向C烷基供体倾斜。 DFT 计算表明,这种结构特征很大程度上是强 Co-C 共价键的结果,强调了 M-C 键合在确定此类配体支持的金属中心(电子)结构中的重要性。
更新日期:2024-01-12
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