Planar Hexacoordinate Carbons: Half Covalent Half Ionic

Abstract

<div>The global minima of thirteen combinations of atoms with formula CE<sub>3</sub>M<sub>3</sub><sup>+</sup> (E=S-Te and M=Li-Cs) adopt a planar structure with carbon covalently bonded to three chalcogens and ionically bonded to the three alkali-metals to stabilize the first global minima structures containing planar hexacoordinate carbon atoms.</div>