Volume 60, Issue 16 pp. 8700-8704
Communication

Planar Hexacoordinate Carbons: Half Covalent, Half Ionic

Luis Leyva-Parra

Luis Leyva-Parra

Computational and Theoretical Chemistry Group, Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, República 498, Santiago, Chile

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Luz Diego

Luz Diego

Escuela Profesional de Química, Facultad de Ciencias Naturales, Universidad Nacional Federico Villarreal, Jr. Río Chepén 290, El Agustino, Lima, Perú

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Dr. Osvaldo Yañez

Dr. Osvaldo Yañez

Computational and Theoretical Chemistry Group, Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, República 498, Santiago, Chile

Center of New Drugs for Hypertension (CENDHY), Santiago, Chile

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Diego Inostroza

Diego Inostroza

Computational and Theoretical Chemistry Group, Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, República 498, Santiago, Chile

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Jorge Barroso

Corresponding Author

Jorge Barroso

Departamento de Física Aplicada, Centro de Investigación y de Estudios Avanzados, Unidad Mérida, km. 6 Antigua carretera a Progreso, Apdo. Postal 73, Cordemex Mérida, Yuc., México

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Dr. Alejandro Vásquez-Espinal

Corresponding Author

Dr. Alejandro Vásquez-Espinal

Computational and Theoretical Chemistry Group, Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, República 498, Santiago, Chile

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Prof. Gabriel Merino

Corresponding Author

Prof. Gabriel Merino

Departamento de Física Aplicada, Centro de Investigación y de Estudios Avanzados, Unidad Mérida, km. 6 Antigua carretera a Progreso, Apdo. Postal 73, Cordemex Mérida, Yuc., México

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Prof. William Tiznado

Corresponding Author

Prof. William Tiznado

Computational and Theoretical Chemistry Group, Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, República 498, Santiago, Chile

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First published: 01 February 2021
Citations: 67

Graphical Abstract

Fifteen global minima of the CE3M3+ (E=S–Te and M=Li–Cs) series contain a true planar hexacoordinate carbon. The chemical bonding analyses indicate that the carbon atom is covalently bonded to three chalcogens and ionically connected to the three alkali metals.

Abstract

Herein, the first global minima containing a planar hexacoordinate carbon (phC) atom are reported. The fifteen structures belong to the CE3M3+ (E=S–Te and M=Li–Cs) series and satisfy both geometric and electronic criteria to be considered as a true phC. The design strategy consisted of replacing oxygen in the D3h CO3Li3+ structure with heavy and less electronegative chalcogens, inducing a negative charge on the C atom and an attractive electrostatic interaction between C and the alkali-metal cations. The chemical bonding analyses indicate that carbon is covalently bonded to three chalcogens and ionically connected to the three alkali metals.

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