Main-group metal complexes of α-diimine ligands: structure, bonding and reactivity,Dalton Transactions

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Main-group metal complexes of α-diimine ligands: structure, bonding and reactivity
Dalton Transactions ( IF 3.5 ) Pub Date : 2021-09-14 , DOI: 10.1039/d1dt02120f
Rong Zhang ₁ , Yanchao Wang ₁ , Yanxia Zhao ₂ , Carl Redshaw ₃ , Igor L Fedushkin _{2,

4} , Biao Wu ₁ , Xiao-Juan Yang _{1,

2}

Affiliation

α-Diimine ligands, in particular 1,4-diazabutadiene (dad) and bis(iminoacenaphthene) (bian) derivatives, have been widely used for coordination with various metals, including main-group, transition, and lanthanide and actinide metals. In addition to their tunable steric and electronic properties, the dad and bian ligands are redox-active and can readily accept one or two electrons, converting into the radical-anionic (L˙⁻) or dianionic (enediamido, L²⁻) form, respectively. This non-innocence brings about rich electronic structures and properties of the ligands and complexes thereof. For example, the dad ligands in their three redox levels can effectively stabilize a series of metal centers in different oxidation states, including low-valent metals. Moreover, these ligands can serve as electron reservoirs and can participate in reactions toward other molecules with or without metals. Therefore, such ligands are extremely useful in the areas of low-valent complexes and small molecule activation. Herein, we will discuss the use of dad (and bian) ligands in the stabilization of metal–metal-bonded compounds, in particular those of main-group metals, as well as small molecule activation by these (low-valent) metal coordination species where the non-innocence of the ligands plays a key role.

中文翻译：

α-二亚胺配体的主族金属配合物：结构、键合和反应性

α-二亚胺配体，特别是 1,4-二氮杂丁二烯 ( dad ) 和双 (亚氨基苊) ( bian ) 衍生物，已广泛用于与各种金属配位，包括主族金属、过渡金属、镧系金属和锕系金属。除了它们的可调谐的空间和电子属性时，爸爸和扁配体是氧化还原活性的，并且可以容易地接受一个或两个电子，转变成自由基阴离子（L ^{- ）}或二价阴离子（enediamido，L ^2-）的形式，分别。这种非纯洁性带来了丰富的电子结构和配体及其配合物的特性。例如，爸爸三个氧化还原水平的配体可以有效地稳定一系列不同氧化态的金属中心，包括低价金属。此外，这些配体可以作为电子储存器，并可以参与对其他分子的反应，有或没有金属。因此，此类配体在低价复合物和小分子活化领域非常有用。在此，我们将讨论dad（和bian）配体在稳定金属-金属键合化合物，尤其是主族金属化合物中的应用，以及这些（低价）金属配位物质对小分子的活化其中配体的无罪发挥了关键作用。

更新日期：2021-09-14

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