Why Do Five Ga⁺ Cations Form a Ligand-Stabilized [Ga₅ ]⁵⁺ Pentagon and How Does a 5:1 Salt Pack in the Solid State?

ABSTRACT: The reaction of the Ga⁺ source [Ga(PhF)₂ ]⁺ [Al(OR^F )₄ ]^- with the neutral σ-donor ligand dmap (4-Me₂ N-C₆ H₄ N) produces the unexpectedly large and fivefold positively charged cluster cation salt [Ga₅ (dmap)₁₀ ]⁵⁺ ([Al(OR^F )₄ ]^- )₅ . It includes a regular and planar Ga₅ pentagon with strong metal-metal bonding. Additionally, the compound represents the first salt in which an ionic 1:5 packing is realized. We discuss the nature of this structure which results from the conversion of the non-bonding 4s² lone-pair orbitals into fully Ga-Ga-bonding orbitals and the solid-state arrangement of the ion

SUBMITTER: Glootz K 

PROVIDER: S-EPMC6790617 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature