Tetracyanoborate
chemical compound
Tetracyanoborate (tetracyanidoborate or tetracyanoboranuide) is an anion or salt of this anion. It has four cyano groups attached to a central boron atom. The formula is [B(CN)4]−.
The anion is weakly coordinating and stable in conjunction with the hydronium ion H3O+.
Tetracyanoborate can form ionic liquids with unsymmetrical quaternary nitrogen cyclic cations. These are under investigation as carbon dioxide absorbers for use in carbon capture and storage. They are also used as electrolytes in supercapacitors and electric batteries.
Tetracyanoborate compounds were first made by Eduard Bernhardt and team in 2000 after previous failed attempts in the 1950s.
Production
Tetrabutylammonium bromide can react with boron trihalides and potassium cyanide to yield tetrabutylammonium tetracyanoborate.
Tetrafluoroborate salts can react with Me3SiCN when catalysed with Lewis acids to substitute fluoride with cyanide yielding tetracyanoborates.
“Tetracyanoborate” enters the record as chemical compound. Crown Archives preserves that source wording while asking what Tetracyanoborate, chemical and compound can confirm, complicate or overturn.
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This entry incorporates text from “Tetracyanoborate” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.