Successive modification of polydentate complexes gives access to planar carbon- and nitrogen-based ligands

Xiaoxi Zhou, Xin Pang, Liming Nie, Congqing Zhu, Kaiyue Zhuo, Qingde Zhuo, Zhixin Chen, Gang Liu, Hong Zhang (), Zhenyang Lin and Haiping Xia
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Xiaoxi Zhou: Xiamen University
Xin Pang: Xiamen University
Liming Nie: Xiamen University
Congqing Zhu: Xiamen University
Kaiyue Zhuo: Xiamen University
Qingde Zhuo: Xiamen University
Zhixin Chen: Xiamen University
Gang Liu: Xiamen University
Hong Zhang: Xiamen University
Zhenyang Lin: The Hong Kong University of Science and Technology
Haiping Xia: Xiamen University

Nature Communications, 2019, vol. 10, issue 1, 1-10

Abstract: Abstract Polydentate complexes containing combinations of nitrogen and carbon (N and C) ligating atoms are among the most fundamental and ubiquitous molecules in coordination chemistry, yet the formation of such complexes with planar high-coordinate N/C sites remains challenging. Herein, we demonstrate an efficient route to access related complexes with tetradentate CCCN and pentadentate CCCCN and NCCCN cores by successive modification of the coordinating atoms in complexes with a CCCC core. Combined experimental and computational studies reveal that the rich reactivity of metal-carbon bonds and the inherent aromaticity of the metallacyclic skeletons play key roles in these transformations. This strategy addresses the paucity of synthetic approaches to mixed N/C planar pentadentate chelating species and provides valuable insights into the synthesis of carbon-based high-coordinate complexes. Furthermore, the resulting complexes are the examples of organometallic species with combined photoacoustic, photothermal, and sonodynamic properties, which makes them promising for application in related areas.

Date: 2019
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DOI: 10.1038/s41467-019-09367-8

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