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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.
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.
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.
Propylene glycol methyl ether acetate (PGMEA, 1-methoxy-2-propanol acetate) is a P-type glycol ether used in inks, coatings, and cleaners. It is sold by Dow Chemical under the name Dowanol PMA, [ 3 ] by Shell Chemical under the name methyl proxitol acetate, [ 4 ] [ 5 ] and by Eastman under the name PM Acetate.
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.
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 real story behind the 10,000 step number is a little wilder and less science-forward than you might think. In this feature, Women's Health investigates. 10,000 Steps Is A Myth.
Pages in category "Methoxy compounds" The following 200 pages are in this category, out of approximately 381 total. This list may not reflect recent changes.