Solvent-free anhydrous Li+, Na+ and K+ salts of [B(3,5-(CF3)2C6H3)4]−, [BArF4]−. Improved synthesis and solid-state structures

Abstract

A modified, convenient, preparation of solvent-free, anhydrous, Li⁺, Na⁺ and K⁺ salts of the ubiquitous [BAr^F₄]⁻ anion is reported, that involves a simple additional recrystallisation step. Anhydrous Na[BAr^F₄], K[BAr^F₄], and [Li(H₂O)][BAr^F₄], were characterised by single-crystal X-ray diffraction.