Synthesis and Characterization of Monomeric Hexacoordinated Chalcogenonium Salts Bearing 2-(2-Pyridyl)phenyl Ligands

Consecutive treatment of 2-(2-lithiophenyl)pyridine with chalcogen tetrachlorides (ChCl4; Ch = Se and Te) and KPF6 afforded the hexafluorophosphate salts of tris[2-(2-pyridyl)phenyl]selenonium [(ppy)3Se]+ ([1]+) and tris[2-(2-pyridyl)phenyl]telluronium [(ppy)3Te]+ ([2]+), respectively. The chalcogenonium salts [1][PF6] and [2][PF6] exhibit extremely high thermal stability and high melting points. Their solid-state structures revealed distorted...