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inorganic compound : ウィキペディア英語版
inorganic compound
(詳細はorganic".
Inorganic compounds are traditionally viewed as being synthesized by the agency of geological systems. In contrast, organic compounds are found in biological systems. The distinction between inorganic and organic compounds is not always clear. Organic chemists traditionally refer to any molecule containing carbon as an organic compound and by default this means that inorganic chemistry deals with molecules lacking carbon.〔Major textbooks on inorganic chemistry, however, decline to define inorganic compounds: Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Francisco, 2001. ISBN 0-12-352651-5; , 〕〔The 19th century., Arnoldischen Buchhandlung, Dresden and Leipzig, 1827. ISBN 1-148-99953-1. Brief English commentary in English can be found in Bent Soren Jorgensen "More on Berzelius and the vital force" J. Chem. Educ., 1965, vol. 42, p 394. 〕 although many minerals are of biological origin. Biologists may distinguish organic from inorganic compounds in a different way that does not hinge on the presence of a carbon atom. Pools of organic matter, for example, that have been metabolically incorporated into living tissues persist in decomposing tissues, but as molecules become oxidized into the open environment, such as atmospheric CO2, this creates a separate pool of inorganic compounds. The International Union of Pure and Applied Chemistry, an agency widely recognized for defining chemical terms, does not offer definitions of inorganic or organic. Hence, the definition for an inorganic versus an organic compound in a multidisciplinary context spans the division between living (or animate) and non-living (or inanimate) matter and remains open to debate according to the way that one views the world.〔(【引用サイトリンク】title=organic compound – chemical compound )
== Traditional usage ==
The Wöhler synthesis is the conversion of ammonium cyanate into urea. This chemical reaction was discovered in 1828 by Friedrich Wöhler and is considered the starting point of modern organic chemistry.
The Wöhler synthesis is of great historical significance because for the first time an organic compound was produced from inorganic reactants. This finding went against the mainstream theory of that time called vitalism, which stated that organic matter possessed a special force or ''vital force'' inherent to all things living. For this reason a sharp boundary existed between organic and inorganic compounds. Urea was discovered in 1799 and could until 1828 only be obtained from biological sources such as urine. Wöhler reported to his mentor Berzelius:
"''I cannot, so to say, hold my chemical water and must tell you that I can make urea without thereby needing to have kidneys, or anyhow, an animal, be it human or dog''".

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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