Phenolates (also called phenoxides) are anions, salts, and esters of phenols, containing the phenolate ion. They may be formed by reaction of phenols with strong base. [1]
Alkali metal phenolates, such as sodium phenolate hydrolyze in aqueous solution to form basic solutions. [2] At pH = 10, phenol and phenolate are in approximately 1:1 proportions.
The phenoxide anion (aka phenolate) is a strong nucleophile with a comparable to the one of carbanions or tertiary amines. [3] Generally, oxygen attack of phenoxide anions is kinetically favored, while carbon-attack is thermodynamically preferred (see Thermodynamic versus kinetic reaction control). Mixed oxygen/carbon attack and by this a loss of selectivity is usually observed if the reaction rate reaches diffusion control. [4]
Alkyl aryl ethers can be synthesized through the Williamson ether synthesis by treating sodium phenolate with an alkyl halide: [5]
Salicylic acid is produced in the Kolbe–Schmitt reaction between carbon dioxide and sodium phenolate.