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Identification of a uranium-rhodium triple bond in a heterometallic cluster.


ABSTRACT: The chemistry of d-block metal-metal multiple bonds has been extensively investigated in the past 5 decades. However, the synthesis and characterization of species with f-block metal-metal multiple bonds are significantly more challenging and such species remain extremely rare. Here, we report the identification of a uranium-rhodium triple bond in a heterometallic cluster, which was synthesized under routine conditions. The uranium-rhodium triple-bond length of 2.31 Å in this cluster is only 3% longer than the sum of the covalent triple-bond radii of uranium and rhodium (2.24 Å). Computational studies reveal that the nature of this uranium-rhodium triple bond is 1 covalent bond with 2 rhodium-to-uranium dative bonds. This heterometallic cluster represents a species with f-block metal-metal triple bond structurally authenticated by X-ray diffraction. These studies not only demonstrate the authenticity of the uranium-metal triple bond, but also provide a possibility for the synthesis of other f-block metal-metal multiple bonds. We expect that this work may further our understanding of the bonding between uranium and transition metals, which may help to design new d-f heterometallic catalysts with uranium-metal bonds for small-molecule activation and to promote the utilization of abundant depleted uranium resources.

SUBMITTER: Feng G 

PROVIDER: S-EPMC6731654 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature

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Identification of a uranium-rhodium triple bond in a heterometallic cluster.

Feng Genfeng G   Zhang Mingxing M   Wang Penglong P   Wang Shuao S   Maron Laurent L   Zhu Congqing C  

Proceedings of the National Academy of Sciences of the United States of America 20190819 36


The chemistry of <i>d</i>-block metal-metal multiple bonds has been extensively investigated in the past 5 decades. However, the synthesis and characterization of species with <i>f</i>-block metal-metal multiple bonds are significantly more challenging and such species remain extremely rare. Here, we report the identification of a uranium-rhodium triple bond in a heterometallic cluster, which was synthesized under routine conditions. The uranium-rhodium triple-bond length of 2.31 Å in this clust  ...[more]

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