1st row transition metal aluminylene complexes: preparation, properties and bonding analysis.

1st row transition metal aluminylene complexes: preparation, properties and bonding analysis.
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第一排过渡金属亚铝烯配合物:制备、性能和成键分析。

DOI:
10.1039/d1dt01415c
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发表时间:
2021
期刊:
2003)
影响因子:
--
通讯作者:
Kong RY
Kong RY
中科院分区:
--
文献类型:
--
作者:
Kong RY

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报道了八种新的第一行过渡金属(M = Cr,Mn,Fe,Co,Cu)铝烯配合物的合成和光谱性质。DFT和从头计算已被用来提供详细的洞察到金属-金属键。通过NBO和ETS-NOCV计算评估了该配体的σ-施主和π-反馈性质。计算结果表明,这些配体既是强的σ-给体,又是强的π-受体。这些性质不是固定的,而是根据过渡金属中心的性质而变化,这表明亚铝基片段可以调节它们的键合以容纳富电子和贫电子的过渡金属。从头计算DLPNO-CCSD(T)表明,分散起着重要的作用,在稳定这些复合物。短程和长程色散相互作用被确定。这些结果可能会为基于铝金属配体的下一代催化剂的设计提供信息。
The synthesis and spectroscopic characterisation of eight new first-row transition metal (M = Cr, Mn, Fe, Co, Cu) aluminylene complexes is reported. DFT and ab initio calculations have been used to provide detailed insight into the metal–metal bond. The σ-donation and π-backdonation properties of the aluminylene ligand are evaluated via NBO and ETS-NOCV calculations. These calculations reveal that these ligands are strong σ-donors but also competent π-acceptors. These properties are not fixed but vary in response to the nature of the transition metal centre, suggesting that aluminylene fragments can modulate their bonding to accommodate both electron-rich and electron-poor transition metals. Ab initio DLPNO-CCSD(T) calculations show that dispersion plays an important role in stabilising these complexes. Both short-range and long-range dispersion interactions are identified. These results will likely inform the design of next-generation catalysts based on aluminium metalloligands.
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