A nitronate (IUPAC: azinate) in organic chemistry is a functional group with the general structure R1R2C=NO−2. It is the anion of nitronic acid (sometimes also called an aci, or an azinic acid), a tautomeric form of a nitro compound. Just as ketones and aldehydes can exist in equilibrium with their enol tautomer, nitro compounds exist in equilibrium with their nitronate tautomer under basic conditions. In practice they are formed by the deprotonation of the α-carbon, the pka of which is typically around 17.
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| - Nitronato (es)
- Acidi nitronici (it)
- Nitronate (fr)
- Nitronate (en)
- Nitronaat (nl)
- Нитронаты (ru)
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| - En química orgánica, un nitronato es un grupo funcional con la estructura general R1R2C=N+(OH)(O-). Es una forma tautomérica de un grupo nitro. Un nitronato también es denominado forma aci. En la reacción de Nef, los nitronatos son degradados a cetonas.Los nitronatos pueden ser alquilados en el átomo de oxígeno, y ser usados como un dipolo en .
* Datos: Q111461805 (es)
- En chimie organique, un nitronate (IUPAC : azinate) est un groupe fonctionnel de formule générale R1R2C=N+(O−)2.C'est la forme anionique de l'acide nitronique, un tautomère du composé nitro correspondant. Cet acide nitronique est aussi appelé « forme aci ». Dans la réaction de Nef, des acides nitroniques sont dégradés en cétones. Ils peuvent aussi être alkylés sous dioxygène et utilisés comme dipôles dans les cycloadditions 1,3-dipolaires. (fr)
- Een nitronaat is in de organische chemie een functionele groep of stofklasse met als algemene formule R1R2C=N+(OH)(O−). Het is de tautomerische vorm van een nitrogroep. In een Nef-reactie worden nitronaten omgevormd tot ketonen. (nl)
- Gli acidi nitronici o acidi azinici sono dei composti organici azotati con formula condensata RR'C=NOOH derivati dalla struttura inorganica base dell'acido nitronico (H2NOOH). Tali composti si trovano in equilibrio tautomerico coi nitroderivati di formula generale RR'CH-NO2 aventi almeno un atomo di idrogeno sul carbonio in alfa al nitrogruppo. Come nel caso degli enoli affinché si instauri l'equilibrio è necessaria la formazione di un intermedio di reazione, in questo caso l'anione nitronato di formula RR'C=NO2−. (it)
- Нитронаты — органические соединения, в которых присутствует функциональная группа =N+(O−)(O−), представляющая собой таутомерную форму нитро-группы −NO2. Общая формула нитронатов R1R2C=N+(OX)(O−). Если X = H, нитронаты обычно называют нитроновыми кислотами; существуют также нитроновые соли (X = металл), нитроновые эфиры (X = углеводородный радикал) и т.д. По сути, нитронаты являются аци-формой первичных и вторичных нитросоединений: (ru)
- A nitronate (IUPAC: azinate) in organic chemistry is a functional group with the general structure R1R2C=NO−2. It is the anion of nitronic acid (sometimes also called an aci, or an azinic acid), a tautomeric form of a nitro compound. Just as ketones and aldehydes can exist in equilibrium with their enol tautomer, nitro compounds exist in equilibrium with their nitronate tautomer under basic conditions. In practice they are formed by the deprotonation of the α-carbon, the pka of which is typically around 17. (en)
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| - En química orgánica, un nitronato es un grupo funcional con la estructura general R1R2C=N+(OH)(O-). Es una forma tautomérica de un grupo nitro. Un nitronato también es denominado forma aci. En la reacción de Nef, los nitronatos son degradados a cetonas.Los nitronatos pueden ser alquilados en el átomo de oxígeno, y ser usados como un dipolo en .
* Datos: Q111461805 (es)
- En chimie organique, un nitronate (IUPAC : azinate) est un groupe fonctionnel de formule générale R1R2C=N+(O−)2.C'est la forme anionique de l'acide nitronique, un tautomère du composé nitro correspondant. Cet acide nitronique est aussi appelé « forme aci ». Dans la réaction de Nef, des acides nitroniques sont dégradés en cétones. Ils peuvent aussi être alkylés sous dioxygène et utilisés comme dipôles dans les cycloadditions 1,3-dipolaires. (fr)
- A nitronate (IUPAC: azinate) in organic chemistry is a functional group with the general structure R1R2C=NO−2. It is the anion of nitronic acid (sometimes also called an aci, or an azinic acid), a tautomeric form of a nitro compound. Just as ketones and aldehydes can exist in equilibrium with their enol tautomer, nitro compounds exist in equilibrium with their nitronate tautomer under basic conditions. In practice they are formed by the deprotonation of the α-carbon, the pka of which is typically around 17. Nitronates are formed as intermediates in the Henry reaction and Nef reaction, the latter of which also demonstrates the instability of the nitronic acid form. The nitronate has two different resonance structures, one with a negative charge on the α-carbon and a double bond between the nitrogen and one of the oxygens, and another resonance structure with a double bond between the nitrogen and the α carbon, and no double bond between the nitrogen and the oxygens. (en)
- Een nitronaat is in de organische chemie een functionele groep of stofklasse met als algemene formule R1R2C=N+(OH)(O−). Het is de tautomerische vorm van een nitrogroep. In een Nef-reactie worden nitronaten omgevormd tot ketonen. (nl)
- Gli acidi nitronici o acidi azinici sono dei composti organici azotati con formula condensata RR'C=NOOH derivati dalla struttura inorganica base dell'acido nitronico (H2NOOH). Tali composti si trovano in equilibrio tautomerico coi nitroderivati di formula generale RR'CH-NO2 aventi almeno un atomo di idrogeno sul carbonio in alfa al nitrogruppo. Come nel caso degli enoli affinché si instauri l'equilibrio è necessaria la formazione di un intermedio di reazione, in questo caso l'anione nitronato di formula RR'C=NO2−. (it)
- Нитронаты — органические соединения, в которых присутствует функциональная группа =N+(O−)(O−), представляющая собой таутомерную форму нитро-группы −NO2. Общая формула нитронатов R1R2C=N+(OX)(O−). Если X = H, нитронаты обычно называют нитроновыми кислотами; существуют также нитроновые соли (X = металл), нитроновые эфиры (X = углеводородный радикал) и т.д. По сути, нитронаты являются аци-формой первичных и вторичных нитросоединений: (ru)
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