An inorganic compound is typically a chemical compound that lacks carbon–hydrogen bondsthat is, a compound that is not an organic compound.[ Brief commentary can be found in ][Dan Berger, Bluffton College, analysis of varying inappropriate definitions of the inorganic-organic distinction: Otherwise consistent linked material differing from current article in downplaying the carbon present vs carbon absent distinctive: [1]] The study of inorganic compounds is a subfield of chemistry known as inorganic chemistry.
Inorganic compounds comprise most of the Earth's crust, although the compositions of the deep mantle remain active areas of investigation.
All (structurally different pure forms of an element) and some simple carbon compounds are often considered inorganic. Examples include the allotropes of carbon (graphite, diamond, buckminsterfullerene, graphene, etc.), carbon monoxide , carbon dioxide , , and salts of inorganic such as , , , , , etc. Many of these are normal parts of mostly organic systems, including ; describing a chemical as inorganic does not necessarily mean that it cannot occur within life things.
History
Friedrich Wöhler's conversion of
ammonium cyanate into
urea in 1828 is often cited as the starting point of modern organic chemistry.
In Wöhler's era, there was widespread belief that
were characterized by a
vitalism. In the absence of vitalism, the distinction between inorganic and organic chemistry is merely semantic.
Modern usage
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The Inorganic Crystal Structure Database (ICSD) in its definition of "inorganic" carbon compounds, states that such compounds may contain either C-H or C-C bonds, but not both.
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The book series Inorganic Syntheses does not define inorganic compounds. The majority of its content deals with metal complexes of organic ligands.
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IUPAC does not offer a definition of "inorganic" or "inorganic compound" but does define inorganic polymer as "...skeletal structure that does not include carbon atoms."
See also
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Inorganic compounds by element
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List of inorganic compounds
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List of named inorganic compounds
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Mineral acid