Synthesis of 1,2,3-tripnictolide anions by reaction of group 15 Zintl ions with acetylene. Isolation of [E3C2H2]− (E = P, As) and preliminary reactivity studies

Abstract

Dimethylformamide solutions of K₃E₇ (E = P, As) react with acetylene yielding the 1,2,3-tripnictolide anions [E₃C₂H₂]⁻ (R = P (1), As (2)). Preliminary studies have shown that 1 and 2 displace labile ligands in [Ru(COD){η³-CH₃C(CH₂)₂}₂] (COD = 1,5-cyclooctadiene) to yield the novel complexes [Ru(η⁵-E₃C₂H₂){CH₃C(CH₂)₂}₂}]⁻ (E = P (3), As (4)).