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GENERAL
(A) ESTERS OF INORGANIC ACIDS OF NON-METALS
These compounds are usually formed by the reaction of an alcohol or phenol with inorganic acids of non-metals. They have the general formula (ROX) in which R is an alcoholic or phenolic radical and X is the residue of the inorganic acid molecule known as an acid radical.
The acid radical of nitric acid is (-NO2), of sulphuric acid (=SO2), of phosphoric acid (ºPO); and of carbonic acid (CO).
This sub-Chapter excludes esters of later headings in this Chapter. (B) SALTS OF ESTERS OF INORGANIC ACIDS OF NON-METALS
These can be obtained only from esters of inorganic polybasic acids of non-metals (sulphuric, phosphoric, silicic, etc.). Polybasic acids have more than one replaceable acidic element, and when all such elements are not esterified the result is an acid ester.
Appropriate treatment of these acid esters produces a salt of an ester of an inorganic acid of a non-metal.
Nitrous and nitric acids, on the other hand, being monobasic, can give only neutral esters.
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