Bi—Zn Bond Formation in Liquid Ammonia Solution: [Bi—Zn—Bi]~(4-), a Linear Polyanion that is Iso(valence)-electronic to CO2

摘要

Reactions of the zinc(I) complex [Zn2(Mesnacnac)2] (Mesnacnac = [(2,4,6-Me3C6H2)NC(Me)]2CH) with solid K3Bi2 dissolved in liquid ammonia yield crystals of the compound K4[ZnBi2]·NH3)_(12) (1), which contains the molecular, linear heteroatomic [Bi—Zn—Bi]~(4-) polyanion (1 a). This anion represents the first example of a three-atomic molecular ion of metal atoms being iso (valence)-electronic to CO2 and being synthesized in solution. The analogy of the discrete [Bi— Zn—Bi]~(4-) anion and the polymeric _∞~1[(ZnBi_(4/2))~(4-)] unit to monomeric CO2 and polymeric SiS2 is rationalized.