Editing Carbon compounds (section)

===Carbon-oxygen compounds===
There are many [[oxide]]s of carbon ([[oxocarbon]]s), of which the most common are [[carbon dioxide]] (CO<sub>2</sub>) and [[carbon monoxide]] (CO). Other less known oxides include [[carbon suboxide]] (C<sub>3</sub>O<sub>2</sub>) and [[mellitic anhydride]] (C<sub>12</sub>O<sub>9</sub>).<ref>It is an organic compound.</ref> There are also numerous unstable or elusive oxides, such as [[dicarbon monoxide]] (C<sub>2</sub>O), [[oxalic anhydride]] (C<sub>2</sub>O<sub>4</sub>), and [[carbon trioxide]] (CO<sub>3</sub>).

There are several [[oxocarbon anion]]s, negative ions that consist solely of oxygen and carbon. The most common are the [[carbonate]] (CO<sub>3</sub><sup>2−</sup>) and [[oxalate]] (C<sub>2</sub>O<sub>4</sub><sup>2−</sup>).  The corresponding acids are the highly unstable [[carbonic acid]] (H<sub>2</sub>CO<sub>3</sub>) and the quite stable [[oxalic acid]] (H<sub>2</sub>C<sub>2</sub>O<sub>4</sub>), respectively.  These anions can be partially deprotonated to give the [[bicarbonate]] (HCO<sub>3</sub><sup>−</sup>) and [[hydrogenoxalate]]  (HC<sub>2</sub>O<sub>4</sub><sup>−</sup>).  Other more exotic carbon–oxygen anions exist, such as [[acetylenedicarboxylic acid|acetylenedicarboxylate]] (O<sub>2</sub>C–C≡C–CO<sub>2</sub><sup>2−</sup>), [[mellitic acid|mellitate]] (C<sub>12</sub>O<sub>9</sub><sup>6−</sup>), [[squaric acid|squarate]] (C<sub>4</sub>O<sub>4</sub><sup>2−</sup>), and [[rhodizonic acid|rhodizonate]] (C<sub>6</sub>O<sub>6</sub><sup>2−</sup>).  The [[anhydride]]s of some of these acids are oxides of carbon; carbon dioxide, for instance, can be seen as the anhydride of carbonic acid.

Some important carbonates are
[[Silver carbonate|Ag<sub>2</sub>CO<sub>3</sub>]],
[[Barium carbonate|BaCO<sub>3</sub>]],
[[Calcium carbonate|CaCO<sub>3</sub>]],
[[Cadmium carbonate|CdCO<sub>3</sub>]],
[[Cerium(III) carbonate|Ce<sub>2</sub>(CO<sub>3</sub>)<sub>3</sub>]],
[[Cobalt(II) carbonate|CoCO<sub>3</sub>]],
[[Caesium carbonate|Cs<sub>2</sub>CO<sub>3</sub>]],
[[Copper(II) carbonate|CuCO<sub>3</sub>]],
[[Iron(II) carbonate|FeCO<sub>3</sub>]],
[[Potassium carbonate|K<sub>2</sub>CO<sub>3</sub>]],
[[Lanthanum carbonate|La<sub>2</sub>(CO<sub>3</sub>)<sub>3</sub>]],
[[Lithium carbonate|Li<sub>2</sub>CO<sub>3</sub>]],
[[Magnesium carbonate|MgCO<sub>3</sub>]],
[[Manganese(II) carbonate|MnCO<sub>3</sub>]],
[[Ammonium carbonate|(NH<sub>4</sub>)<sub>2</sub>CO<sub>3</sub>]],
[[Sodium carbonate|Na<sub>2</sub>CO<sub>3</sub>]],
[[Nickel(II) carbonate|NiCO<sub>3</sub>]],
[[Lead(II) carbonate|PbCO<sub>3</sub>]],
[[Strontium carbonate|SrCO<sub>3</sub>]], and
[[Zinc carbonate|ZnCO<sub>3</sub>]].

The most important bicarbonates include 
[[Ammonium bicarbonate|NH<sub>4</sub>HCO<sub>3</sub>]],
[[Calcium bicarbonate|Ca(HCO<sub>3</sub>)<sub>2</sub>]],
[[Potassium bicarbonate|KHCO<sub>3</sub>]], and
[[Sodium bicarbonate|NaHCO<sub>3</sub>]].

The most important oxalates include
[[Silver oxalate|Ag<sub>2</sub>C<sub>2</sub>O<sub>4</sub>]],
[[Barium oxalate|BaC<sub>2</sub>O<sub>4</sub>]],
[[Calcium oxalate|CaC<sub>2</sub>O<sub>4</sub>]], 
[[Cerium oxalate|Ce<sub>2</sub>(C<sub>2</sub>O<sub>4</sub>)<sub>3</sub>]],
[[Potassium oxalate|K<sub>2</sub>C<sub>2</sub>O<sub>4</sub>]], and
[[Disodium oxalate|Na<sub>2</sub>C<sub>2</sub>O<sub>4</sub>]].

[[Carbonyl]]s are coordination complexes between transition metals and [[carbonyl]] ligands. [[Metal carbonyl]]s are complexes that are formed with the neutral ligand CO. These complexes are covalent. Here is a list of some carbonyls:
[[Chromium carbonyl|Cr(CO)<sub>6</sub>]],
[[Cobalt carbonyl|Co<sub>2</sub>(CO)<sub>8</sub>]],
[[Iron pentacarbonyl|Fe(CO)<sub>5</sub>]],
[[Manganese carbonyl|Mn<sub>2</sub>(CO)<sub>10</sub>]],
[[Molybdenum carbonyl|Mo(CO)<sub>6</sub>]],
[[Nickel carbonyl|Ni(CO)<sub>4</sub>]],
[[Tungsten carbonyl|W(CO)<sub>6</sub>]].