Also known as tetrachloroaluminate(1-), AlCl4(-), [AlCl4](-), tetrachloroaluminate ion, tetrachloridoaluminate, AlCl4-, chloroaluminate
Tetrachloroaluminate [AlCl4]− is an anion formed from aluminium trichloride and chloride. The anion has a tetrahedral shape and is isoelectronic with silicon tetrachloride. Some tetrachloroaluminates are soluble in organic solvents, creating an ionic non-aqueous solution, making them suitable as component of electrolytes for batteries. For example, lithium tetrachloroaluminate is used in some lithium batteries.
== Formation == thumb|structure of tetrachloroaluminate salt of tetrachlorocyclopropene|trichlorocyclopropenium cation. Color code: Cl = green, mauve = Al. The Al-Cl distance is 213 [[picometers.|144px|left]] Tetrachloroaluminate ions are formed as intermediates in the Friedel–Crafts reactions when aluminium chloride is used as the catalyst. In the case of the Friedel–Crafts acylation, the reaction is often broken into three steps as follows: The acyl halide reacts with the strong Lewis acid to form an activated electrophile, tetrachloroaluminate salt of the acylium ion.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).