Boron-Sulfur and Boron-Selenium Compounds-From Unique Molecular Structural Principles to Novel Polymeric Materials

An immensely broad scope of structural motifs is covered by the intriguing chemistry of boron-sulfur and boron-selenium compounds. Characteristic structural features of the binary boron sulfides can be applied to understand and rationalize the three-dimensional atomic arrangement in macromolecular anionic frameworks such as that of Li_6+2x [B₁₀ S₁₈ ]S_x (x≈2, shown in the picture; ○: S, •: B, ○: Li). Of interest are also the ion dynamics of lithium thioborates and a persubstituted B₁₂ icosahedron that was prepared by high-temperature synthesis and features a characteristic planar B₃ Se₂ ring at the chelating ligand.