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The term alkoxide refers to the anionic conjugate bases of alcohols (RO −) or to ionic compounds containing such an anion. Alkoxide compounds are derivatives of alcohols where the hydrogen of the –OH group is replaced by a metal ; [ 2 ] for example, the sodium salt of ethanol ( CH 3 CH 2 OH ) is sodium ethoxide , containing ethoxide anions ...
Structure of the methoxide anion. Although alkali metal alkoxides are not salts and adopt complex structures, they behave chemically as sources of RO −. The structure of the methoxide ion. In chemistry, an alkoxide is the conjugate base of an alcohol and therefore consists of an organic group bonded to a negatively charged oxygen atom.
Structure of the methoxide anion. Although alkali metal alkoxides are not salts and adopt complex structures, they behave chemically as sources of RO −.. A transition metal alkoxide complex is a kind of coordination complex containing one or more alkoxide ligands, written as RO −, where R is the organic substituent.
Sodium methoxide is prepared by treating methanol with sodium: 2 Na + 2 CH 3 OH → 2 CH 3 ONa + H 2. The reaction is so exothermic that ignition is possible. The resulting solution, which is colorless, is often used as a source of sodium methoxide, but the pure material can be isolated by evaporation followed by heating to remove residual methanol.
It is easily prepared in the laboratory by treating sodium metal with absolute ethanol: [3] 2 CH 3 CH 2 OH + 2 Na → 2 CH 3 CH 2 ONa + H 2. The reaction of sodium hydroxide with anhydrous ethanol suffers from incomplete conversion to the ethoxide, but can still produce dry NaOEt by precipitation using acetone, [4] or by drying using additional ...
Anhydrous base such as sodium methoxide in methanol. Very useful when a methyl ester of a carboxylic acid is also present in the molecule, as it will not hydrolyze it like an aqueous base would. (Same also holds with an ethoxide in ethanol with ethyl esters) [ 8 ]
The structure of a typical methoxy group. In organic chemistry, a methoxy group is the functional group consisting of a methyl group bound to oxygen.This alkoxy group has the formula R−O−CH 3.
The hydroxide ion by itself is not a strong enough base, but it can be converted in one by adding sodium hydroxide to ethanol. OH − + EtOH ⇌ EtO − + H 2 O. to produce the ethoxide ion. The pK a for self-dissociation of ethanol is about 16, so the alkoxide ion is a strong enough base. [49]