Evidence of Solubility of the Acetylide Ion C₂²⁻: Syntheses and Crystal Structures of K₂C₂⋅2 NH₃, Rb₂C₂⋅2 NH₃, and Cs₂C₂⋅7 NH₃

Abstract

Carbon anions in solution: C(2)(2-) dumbbells are well-known in solid-state compounds. The crystallization of the title compounds now shows that acetylide ions are existent in solution and therefore chemistry with small dissolved carbon anions may be within reach.