methoxyl


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methoxyl

[mə′thäk·səl]
(organic chemistry)
CH3O‒ A functional group which is univalent.
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The 1H-NMR spectrum further displayed signal for methoxyl proton at I' 3.75 (s) and two overlapped doublets due to geminal protons of another methylene group at I' 3.39 (1H, d, J = 12.4 Hz) and 3.42 (1H, d, J = 12.4 Hz).
Chapter 9, Market Trend Analysis, Regional Market Trend, Market Trend by Product Type [, High Methoxyl Pectin (HMP) & Low Methoxyl Pectin (LMP)], Market Trend by Application [Supermarkets and Hypermarkets, Independent Retailers, Specialty Stores & Other];
Anthocyanidins have showed up as aglycone form, which is structurally based on the flvylium cation having hydroxyl, or methoxyl groups present at different positions of the main structure (32).
la, the characterized peaks on raw kraft lignin is a broad band at 3,450 [cm.sup.-1] for O-H and a peak at 2,935 [cm.sup.-1] for the vibration of methoxyl groups [33].
The total six signals of H with ring B is symmetrical, free methoxyl group at position C-4 in the downfield region in its [.sup.1]H-NMR spectra.
They typically have methoxyl groups which are sites for further functionalization.
Curcumin is a unique antioxidant; its distinctiveness is attributed by the presence of a variety of functional groups: [beta]-Diketo groups, carbon-carbon double bonds, and phenyl rings containing varying amounts of hydroxyl and methoxyl substituents, rather than just having either a phenolic functional group or a [beta]-Diketone group, like most other antioxidants.
Other than these common peaks observed for all derivatives, certain specific peaks for individual compounds owing to the presence of certain side groups were also noticed such as 1029-1053 cm-for methoxyl group in compound 3 (a, b), 520 cm-1 for bromo group in compound 4 (a, b), 1128-1178 cm-1 for hydroxyl group in 5 (a, b), 1000-1070 cm-1 for fluoro group in compound 6 (a, b) and 732-765 cm-1 for chloro group in 7 (a, b)-8 (a, b) compounds (Nikoofar et al., 2015).
Generally, the methane evolved during the oil shale pyrolysis process may result primarily from the cleavage of methyl and methoxyl groups attached to aromatic and aliphatic structures, as well as the cleavage of methylene bridges connecting the aromatic rings.
Many of these molecules are aromatic compounds that have carboxyl groups and, generally, they present an electron-donating group, such as amine or a methoxyl group, in the ortho or para positions [25].