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In chemistry, meta is a prefix, used for systematic names in IUPAC nomenclature. It has several meanings.〔dictionary.reference.com: (meta- )〕 *In organic chemistry, meta indicates the positions of substituents in aromatic cyclic compounds. The substituents have the 1,3-positions, for example in resorcinol. *Meta may also denote the dehydrated form of an acid, salt or organic derivative in a series. :For example metabisulfite: :2 bisulfite (HSO3−) → 1 metabisulfite S2O52− + H2O :and metaphosphoric acid: :3 orthophosphoric acid H3PO4 → 1 trimetaphosphoric acid (H3P3O9) + 3 H2O. :Meta-antimonic acid, the dehydrated form of antimonic acid (H3SbO4), is HSbO3.〔Sir William Crookes: (Chemical news and journal of industrial science, Volume 31 ) PD @ books.google. 1875; p.76 PDF: ()〕 ==See also== *Arene substitution patterns 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Meta- (chemistry)」の詳細全文を読む スポンサード リンク
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