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Sodium superoxide is the inorganic compound with the formula NaO2.
This yellow-orange solid is a salt of the superoxide anion. It is
an intermediate in the oxidation of sodium by oxygen.The product is
highly paramagnetic, as expected for a salt of the O2 anion. It
hydrolyses readily to give a mixture of sodium hydroxide and sodium
peroxide, as signaled by the bleaching of the sample. It
crystallizes in the NaCl motif.Traditionally, inorganic compounds
are considered to be of a mineral, not biological, origin.
Complementarily, most organic compounds are traditionally viewed as
being of biological origin. Over the past century, the precise
classification of inorganic vs organic compounds has become less
important to scientists, primarily because the majority of known
compounds are synthetic and not of natural origin. Furthermore,
most compounds considered the purview of modern inorganic chemistry
contain organic ligands. The fields of organometallic chemistry and
bioinorganic chemistry explicitly focus on the areas between the
fields of organic, biological, and inorganic chemistry.