Caesium fluoride

Caesium fluoride is an ionic compound composed of caesium cations and fluoride anions. Its high solubility in polar solvents makes it a useful fluoride-ion source in chemical synthesis.

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Ionic bonding: Chemical bonding produced by electrostatic attraction between oppositely charged ions. Caesium fluoride consists of caesium and fluoride ions held together by electrostatic attraction.
Knoevenagel condensation: A carbon–carbon bond-forming reaction between an active methylene compound and a carbonyl compound. Caesium fluoride can promote this condensation in selected synthetic procedures.
Caesium: A soft, highly reactive alkali metal with atomic number 55. Caesium atoms form the positive ions in the compound.
Potassium fluoride: The ionic salt KF, consisting of potassium cations and fluoride anions. It is a less costly alkali-metal fluoride, though its solubility and reactivity differ.
Fluoride ion: The anion F⁻, formed when a fluorine atom gains one electron. This anion is the reactive species transferred in many caesium fluoride reactions.
Fluorination: The introduction of fluorine atoms or fluoride-derived groups into a chemical compound. Caesium fluoride supplies fluoride for reactions that install fluorine-containing groups.
Fluorine: A highly reactive halogen with atomic number 9. Fluorine forms the fluoride anions that pair with caesium ions.
Sodium fluoride: The ionic salt NaF, used in dental care and other applications. Its lower solubility in many organic solvents can make it less convenient for synthesis.
Solvation: The interaction of solvent molecules with dissolved ions or molecules. Solvation affects how readily caesium fluoride dissolves and how reactive its fluoride becomes.
Desilylation: Removal of a silyl group from a molecule, often using fluoride as a reagent. Fluoride attacks silicon, making caesium fluoride useful for removing silyl protecting groups.