Volume 58, Issue 44 pp. 15829-15833
Communication

Tricoordinate Nontrigonal Pnictogen-Centered Radical Anions: Isolation, Characterization, and Reactivity

Dr. Manas Kumar Mondal

Dr. Manas Kumar Mondal

State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023 China

These authors contributed equally to this work.

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Dr. Li Zhang

Dr. Li Zhang

State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023 China

Center of Materials Science and Engineering, Guangxi University of Science and Technology, Liuzhou, 545006 China

These authors contributed equally to this work.

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Zhongtao Feng

Zhongtao Feng

State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023 China

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Shuxuan Tang

Shuxuan Tang

State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023 China

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Rui Feng

Rui Feng

State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023 China

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Dr. Yue Zhao

Dr. Yue Zhao

State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023 China

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Dr. Gengwen Tan

Corresponding Author

Dr. Gengwen Tan

State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023 China

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Dr. Huapeng Ruan

Corresponding Author

Dr. Huapeng Ruan

State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023 China

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Prof. Dr. Xinping Wang

Corresponding Author

Prof. Dr. Xinping Wang

State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023 China

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First published: 03 September 2019
Citations: 64

Graphical Abstract

The selective one-electron reduction of nontrigonal R3E compounds (E=P, As, Sb) afforded the first stable tricoordinate pnictogen-centered radical anion salts; the pnictogen atoms retain a planar T-shaped structure. EPR spectroscopy and calculations reveal that the spin density mainly resides at the p orbital of the pnictogen atom, which is perpendicular to the N3E plane.

Abstract

The search for main-group element-based radicals is one of the main research topics in contemporary chemistry because of their fascinating chemical and physical properties. The Group 15 element-centered radicals mainly feature a V-shaped two coordinate structure, with a couple of radical cations featuring trigonal tricoordinated geometry. Now, nontrigonal compounds R3E (E=P, As, Sb) were successfully synthesized by introducing a new rigid tris-amide ligand. The selective one-electron reduction of R3E afforded the first stable tricoordinate pnictogen-centered radical anion salts; the pnictogen atoms retain planar T-shaped structures. EPR spectroscopy and calculations reveal that the spin density mainly resides at the p orbitals of the pnictogen atoms, which is perpendicular to the N3E planes.

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