Editing Ester (section)

===Esters of inorganic acids===
[[Image:Phosphate Group.svg|130px|thumb|A phosphoric acid ester, where R stands for an [[organyl]] group.]]
Esters can also be derived from inorganic acids.
*[[Perchloric acid]] forms [[perchlorate]] esters, e.g., [[methyl perchlorate]] ({{chem2|CH3\sO\sCl(\dO)3}})
*[[Sulfuric acid]] forms [[organosulfate|sulfate ester]]s, e.g., [[dimethyl sulfate]] ({{chem2|(CH3\sO\s)2S(\dO)2}}) and [[methyl bisulfate]] ({{chem2|CH3\sO\sS(\dO)2\sOH}})
*[[Nitric acid]] forms [[organic nitrate|nitrate esters]], e.g. [[methyl nitrate]] ({{chem2|CH3\sO\sNO2}}) and [[nitroglycerin]] ({{chem2|CH(\sO\sNO2)(\sCH2\sO\sNO2)2}})
*[[Phosphoric acid]] forms [[phosphate ester]]s, e.g. [[triphenyl phosphate]] ({{chem2|O\dP(\sO\sC6H5)3}}) and [[methyl dihydrogen phosphate]] ({{chem2|O\dP(\sO\sCH3)(\sOH)2}})
**[[Pyrophosphoric acid|Pyrophosphoric (diphosphoric) acid]] forms [[pyrophosphate]] esters, e.g. [[tetraethyl pyrophosphate]], [[Adenosine diphosphate|ADP]], [[dADP]], [[ADPR]], [[cADPR]], [[Cytidine diphosphate|CDP]], [[dCDP]], [[Guanosine diphosphate|GDP]], [[Deoxyguanosine diphosphate|dGDP]], [[Uridine diphosphate|UDP]], [[dTDP]], [[MEcPP]], [[HMBPP]], [[DMAPP]], [[Isopentenyl pyrophosphate|IPP]], [[Geranyl pyrophosphate|GPP]], [[Farnesyl pyrophosphate|FPP]], [[Geranylgeranyl pyrophosphate|GGPP]], [[ThDP]], [[FAD]], [[Nicotinamide adenine dinucleotide|NAD]], [[NADP]].
**[[Triphosphoric acid]] forms [[triphosphate]] esters, e.g. [[Adenosine triphosphate|ATP]], [[dATP]], [[Cytidine triphosphate|CTP]], [[dCTP]], [[Guanosine triphosphate|GTP]], [[dGTP]], [[Uridine triphosphate|UTP]], [[dTTP]], [[Inosine triphosphate|ITP]], [[Xanthosine triphosphate|XTP]], [[ThTP]], [[AThTP]].
**[[Tetraphosphoric acid]] forms tetraphosphate esters, e.g. [[hexaethyl tetraphosphate]], [[adenosine tetraphosphate]] (ATPP, Ap4), [[Ap4A]].
*[[Carbonic acid]] forms [[carbonate ester]]s, e.g. [[dimethyl carbonate]] ({{chem2|(CH3\sO\s)2C\dO}}) and 5-membered [[cyclic compound|cyclic]] [[ethylene carbonate]] ({{chem2|(\sCH2\sO\s)2C\dO}}) (if one classifies carbonic acid as an inorganic compound)
*[[Thiocarbonic acid|Trithiocarbonic acid]] forms [[thiocarbonate|trithiocarbonate ester]]s, e.g. [[dimethyl trithiocarbonate]] ({{chem2|(CH3\sS\s)2C\dS}}) (if one classifies trithiocarbonic acid as an inorganic compound)
*[[Chloroformic acid]] forms [[chloroformate]] esters, e.g. [[methyl chloroformate]] ({{chem2|Cl\sC(\dO)\sO\sCH3}}) (if one classifies chloroformic acid as an inorganic compound)
*[[Boric acid]] forms [[Borate#Borate esters|borate esters]], e.g. [[trimethyl borate]] ({{chem2|B(\sO\sCH3)3}})
*[[Chromic acid]] forms [[di-tert-butyl chromate|di-''tert''-butyl chromate]] ({{chem2|((CH3)3C\sO\s)2Cr(\dO)2}})

Inorganic acids that exist as [[tautomers]] form two or more types of esters.
*[[Thiosulfuric acid]] forms two types of [[thiosulfate]] esters, e.g. ''O'',''O''-dimethyl thiosulfate ({{chem2|(CH3\sO\s)2S(\dO)(\dS)}}) and ''O'',''S''-dimethyl thiosulfate ({{chem2|(CH3\sO\s)(CH3\sS\s)S(\dO)2}})
*[[Thiocyanic acid]] forms [[thiocyanate]] esters, e.g. [[methyl thiocyanate]] ({{chem2|CH3\sS\sC\tN}}) (if one classifies thiocyanic acid as an inorganic compound), but forms [[isothiocyanate]] "esters" as well, e.g. [[methyl isothiocyanate]] ({{chem2|CH3\sN\dC\dS}}), although [[organyl]] isothiocyanates are not classified as esters by the [[IUPAC]]
*[[Phosphorous acid]] forms two types of esters: [[phosphite ester]]s, e.g. [[triethyl phosphite]] ({{chem2|P(\sO\sCH2CH3)3}}), and [[Phosphonate|phosphonate esters]], e.g. [[diethyl phosphite|diethyl phosphonate]] ({{chem2|H\sP(\dO)(\sO\sCH2CH3)2}})

Some inorganic acids that are unstable or elusive form stable esters.
*[[Sulfurous acid]], which is unstable, forms stable [[dimethyl sulfite]] ({{chem2|(CH3\sO\s)2S\dO}})
*[[Dicarbonic acid]], which is unstable, forms stable [[dimethyl dicarbonate]] ({{chem2|CH3\sO\sC(\dO)\sO\sC(\dO)\sO\sCH3}})

In principle, a part of metal and metalloid [[alkoxide]]s, of which many hundreds are known, could be classified as esters of the corresponding acids (e.g., [[aluminium triethoxide]] ({{chem2|Al(OCH2CH3)3}}) could be classified as an ester of aluminic acid which is [[aluminium hydroxide]], [[tetraethyl orthosilicate]] ({{chem2|Si(OCH2CH3)4}}) could be classified as an ester of [[orthosilicic acid]], and [[titanium ethoxide]] ({{chem2|Ti(OCH2CH3)4}}) could be classified as an ester of [[Titanic acid|orthotitanic acid]]).