The Biicosahedral Complex Anions [M(B₁₁H₁₁)₂]^3- (M = Cu, Ag, Au): Synthesis and Unexpected Low-Temperature Phase Transition of [Ag(η⁵-B₁₁H₁₁)₂]^3- to [Ag(η²-B₁₁H₁₁)₂]³.

ABSTRACT: We disclose the synthesis and properties of [M(B₁₁H₁₁)₂]^3- (M = Cu, Ag, Au) with the first gold-based anion [Au(B₁₁H₁₁)₂]^3-. The nido-[B₁₁H₁₁]^4- ligand stabilizes complexes with copper, silver, and gold in the highest known oxidation state +V. The relative stability of [M^+V(nido-B₁₁X₁₁)₂]^3-, [M^+III(nido-B₁₁X₁₁)(closo-B₁₁X₁₁)]^3-, and [M^+I(closo-B₁₁X₁₁)₂]^3- isomers (X = H, F) was calculated at the DFT level. Unlike for [Cu(B₁₁H₁₁)₂]^3- and [Au(B₁₁

SUBMITTER: Bernhardt E 

PROVIDER: S-EPMC12790380 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature