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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 . On a benzene ring , the Hammett equation classifies a methoxy substituent at the para position as an electron-donating group , but as an electron-withdrawing group if at the meta position.
The methoxy group is an ortho/para directing group, which means that electrophilic substitution preferentially occurs at these three sites. The enhanced nucleophilicity of anisole vs. benzene reflects the influence of the methoxy group, which renders the ring more electron-rich.
Alkoxy groups Aryloxy groups. In chemistry, the alkoxy group is an alkyl group which is singularly bonded to oxygen; thus R−O.Denoted usually with apostrophe('). The range of alkoxy groups is vast, the simplest being methoxy (CH 3 O−). [1]
For example, prior to the development of the more precise methods of NMR spectroscopy and mass spectrometry, the Zeisel test was widely used to determine the number of methoxy (-OCH 3) and ethoxy (-OCH 2 CH 3) groups in carbohydrate and organophosphorus insecticides.
2-Methoxyethanol, or methyl cellosolve, is an organic compound with formula C 3 H 8 O 2 that is used mainly as a solvent.It is a clear, colorless liquid with an ether-like odor.
Methoxymethanol forms spontaneously when a water solution of formaldehyde and methanol are mixed. [3] [1] or when formaldehyde is bubbled through methanol.[4]In space methoxymethanol can form when methanol radicals (CH 2 OH or CH 3 O) react.
They consist of a disubstituted benzene ring with methoxy group and one methyl group. All three are colorless flammable liquids which are soluble in organic solvents but poorly soluble in water. They are not of major commercial interest although they are precursors to the corresponding methoxybenzoic acids and methoxybenzaldehydes. [1]
The hydroxymethyl group is a substituent with the structural formula −CH 2 −OH.It consists of a methylene bridge (−CH 2 − unit) bonded to a hydroxyl group (−OH).This makes the hydroxymethyl group an alcohol.