Title: Carboxylate
Content: Formate ion, HCOO− ; Acetate ion, CH3COO− ; Methanetetracarboxylate ion, C(COO−)4 ; Oxalate ion, This list is for cases where there is a separate article for the anion or its derivatives. All other organic acids should be found at their parent carboxylic acid.
Title: Carboxylate
Content:    A carboxylate is the conjugate base of a carboxylic acid, RCOO− (or ). It is an ion with negative charge. Carboxylate salts are salts that have the general formula M(RCOO)n, where M is a metal and n is 1, 2,...; carboxylate esters have the general formula RCOOR′ (or RCO2R′). R and R′ are organic groups; R′ ≠ H.
Title: CH3O
Content: Hydroxymethyl (HOCH2&ndash;) ; Methoxy group (H3CO&ndash;) The molecular formula CH3O may refer to:  The chemical name for CH3O is methoxide. It is a base formed from methanol by replacement of the hydroxyl hydrogen with a metal. A strong base and a good nucleophile. Methoxide contains one atom of carbon, three atoms of hydrogen and one atom of oxygen.
Title: Chemical formula
Content:  entire formula of the ion with charge +3. This is strictly optional; a chemical formula is valid with or without ionization information, and Hexamminecobalt(III) chloride may be written as [Co(NH3)6]3+Cl3− or [Co(NH3)6]Cl3. Brackets, like parentheses, behave in chemistry as they do in mathematics, grouping terms together – they are not specifically employed only for ionization states. In the latter case here, the parentheses indicate 6 groups all of the same shape, bonded to another group of size 1 (the cobalt atom), and then the entire bundle, as a group, is bonded to 3 chlorine atoms. In the former case, it is clearer that the bond connecting the chlorines is ionic, rather than covalent.
Title: Bicarbonate
Content: + 2 H2O  + H2O + OH−  H2CO3 + 2  OH− H2CO3 + 2 H2O  + H3O+ + H2O   + 2 H3O+. The bicarbonate ion (hydrogencarbonate ion) is an anion with the empirical formula and a molecular mass of 61.01 daltons; it consists of one central carbon atom surrounded by three oxygen atoms in a trigonal planar arrangement, with a hydrogen atom attached to one of the oxygens. It is isoelectronic with nitric acid. The bicarbonate ion carries a negative one formal charge and is an amphiprotic species which has both acidic and basic properties. It is both the conjugate base of carbonic acid ; and the conjugate acid of, the carbonate ion, as shown by these equilibrium reactions:   A bicarbonate salt forms when a positively charged ion attaches to the negatively charged oxygen atoms of the ion, forming an ionic compound. Many bicarbonates are soluble in water at standard temperature and pressure; in particular, sodium bicarbonate contributes to total dissolved solids, a common parameter for assessing water quality.
Title: 3-Methylbutanoic acid
Content:  An isovalerate or 3-methylbutanoate ion is (CH3)2CHCH2COO&minus;, the conjugate base of the acid. It is the form found in biological systems at physiological pH. An isovalerate or 3-methylbutanoate compound is a salt or ester of the acid.
Title: Oxocarbon anion
Content:  An oxocarbon anion can be seen as the result of removing all protons from a corresponding acid CxHnOy. Carbonate, for example, can be seen as the anion of carbonic acid H2CO3. Sometimes the "acid" is actually an alcohol or other species; this is the case, for example, of acetylenediolate that would yield acetylenediol C2H2O2. However, the anion is often more stable than the acid (as is the case for carbonate); and sometimes the acid is unknown or is expected to be extremely unstable (as is the case of methanetetracarboxylate C(COO−)4).
Title: Chemical formula
Content:  For ions, the charge on a particular atom may be denoted with a right-hand superscript. For example, Na+, or Cu2+. The total charge on a charged molecule or a polyatomic ion may also be shown in this way. For example: H3O+ or SO42−. Note that + and - are used in place of +1 and -1, respectively. For more complex ions, brackets [ ] are often used to enclose the ionic formula, as in [B12H12]2−, which is found in compounds such as Cs2[B12H12]. Parentheses can be nested inside brackets to indicate a repeating unit, as in [Co(NH3)6]3+Cl3−. Here, (NH3)6 indicates that the ion contains six NH3 groups bonded to cobalt, and [ ] encloses 
Title: Oxocarbon anion
Content:  In chemistry, an oxocarbon anion is a negative ion consisting solely of carbon and oxygen atoms, and therefore having the general formula for some integers x, y, and n. The most common oxocarbon anions are carbonate,, and oxalate,. There is however a large number of stable anions in this class, including several ones that have research or industrial use. There are also many unstable anions, like and, that have a fleeting existence during some chemical reactions; and many hypothetical species, like Orthocarbonic acid, that have been the subject of theoretical studies but have yet to be observed. Stable oxocarbon anions form salts with a large variety of cations. Unstable anions may persist in very rarefied gaseous state, such as in interstellar clouds. Most oxocarbon anions have corresponding moieties in organic chemistry, whose compounds are usually esters. Thus, for example, the oxalate moiety [–O–(C=O)2–O–] occurs in the ester dimethyl oxalate H3C–O–(C=O)2–O–CH3.
Title: C3H5O3
Content: Etabonate group : CH3-CH2-O-CO-O- ; Lactate anion, found in salts and solutions of lactic acid The molecular formula C3H5O3 may refer to: 

Question: what is the name for the ch3coo- ion?
Answer: polyatomic anion.