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Orthoesters

An uncommon class of esters are the orthoesters. One of them are the esters of orthocarboxylic acids. Those esters have the formula RC(OR′), where R stands for any group (organic or inorganic) and R ′ stands for organyl group. For example, triethyl orthoformate (HC(OCH CH)) is derived, in terms of its name (but not its synthesis) from esterification of orthoformic acid (HC(OH)) with ethanol.