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m-Xylene (meta-xylene) is an aromatic hydrocarbon. It is one of the three isomers of dimethylbenzene known collectively as xylenes . The m- stands for meta- , indicating that the two methyl groups in m -xylene occupy positions 1 and 3 on a benzene ring.
Generally, two kinds of reactions occur with xylenes: those involving the methyl groups and those involving the ring C–H bonds. Being benzylic and hence weakened, the C–H bonds of the methyl groups are susceptible to free-radical reactions, including halogenation to the corresponding xylene dichlorides (bis(chloromethyl)benzenes), while ...
p-Xylene (para-xylene) is an aromatic hydrocarbon. It is one of the three isomers of dimethylbenzene known collectively as xylenes . The p- stands for para- , indicating that the two methyl groups in p -xylene occupy the diametrically opposite substituent positions 1 and 4.
In the petroleum refining and petrochemical industries, the initialism BTX refers to mixtures of benzene, toluene, and the three xylene isomers, all of which are aromatic hydrocarbons. The xylene isomers are distinguished by the designations ortho – (or o –), meta – (or m –), and para – (or p –) as indicated in the adjacent diagram.
m-Xylene is isomerized to o-xylene. Net production was approximately 500,000 tons in the year 2000. o-Xylene is largely used in the production of phthalic anhydride, which is a precursor to many materials, drugs, and other chemicals. [7] Related to their easy oxidation, the methyl groups are susceptible to halogenation.
Xylene is among the 30 most produced chemicals in the country. It is described as a colorless, ... Ether is a group of flammable and explosive gaseous and liquid chemicals, according to the ...
Transalkylation of toluene and trimethylbenzene to produce xylene. In this example, the M/R ratio is 2. This type of reaction can also be performed with toluene and trimethylbenzene to produce xylene. The reaction occurs via equilibrium, so the product is not pure xylene. Many products are produced with varying numbers of methyl groups.
They are derivatives of phenol with two methyl groups at various positions relative to the hydroxyl group. Six isomers exist, of which 2,6-xylenol with both methyl groups in an ortho position with respect to the hydroxyl group is the most important. The name xylenol is a portmanteau of the words xylene and phenol.
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