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nitrite
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The nitrite ion, which has the chemical formula NO2−, is a symmetric anion with equal N–O bond lengths and an O–N–O bond angle of approximately 120°. Upon protonation, the unstable weak acid nitrous acid is produced. Nitrite can be oxidized or reduced, with the product somewhat dependent on the oxidizing/reducing agent and its strength. The nitrite ion is an ambidentate ligand, and is known to bond to metal centers in at least five different ways.〔 Nitrite is also important in biochemistry as a source of the potent vasodilator nitric oxide. In organic chemistry the NO2 group is present in nitrous acid esters and nitro compounds. Nitrites are also used in the food production industry for curing meat.
== The nitrite ion ==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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