follow Dictionary.com

11 Trending Words of 2014

dimethylbenzene

[dahy-meth-uh l-ben-zeen, -ben-zeen] /daɪˌmɛθ əlˈbɛn zin, -bɛnˈzin/
noun, Chemistry
1.
Origin
1865-1870
1865-70; di-1 + methyl + benzene
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source
Encyclopedia Article for dim-ethylbenzene

dimethylbenzene

any of three isomeric dimethylbenzenes [which have the same chemical formula, C6H4(CH3)2, but different molecular structure], used as solvents, as components of aviation fuel, and as raw materials for the manufacture of dyes, fibres, and films. The three isomers, designated ortho (o), meta (m), and para (p), differ structurally only in the location of the methyl groups. All three are obtained from coal-tar distillate and petroleum as a mixture containing 50-60 percent by volume of m-xylene and 20-25 percent of each of the other isomers. Fractional distillation of the mixture removes the meta and para isomers, which have very similar boiling points, from the less volatile ortho isomer. Upon cooling the mixture of meta and para isomers, much of the p-xylene crystallizes in nearly pure form. The meta isomer, the principal component of the remaining liquid, then can be purified by taking advantage of its solubility in a mixture of hydrofluoric acid and boron trifluoride. Meta- and para-xylene undergo nitration and reduction to give xylidines, used in making dyes. The meta isomer also is converted to trinitro-t-butyl-m-xylene, or xylene musk, a component of perfumes. Oxidation of the xylenes gives monocarboxylic acids (toluic acids), and then dicarboxylic acids (phthalic acids).

Learn more about dimethylbenzene with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
Cite This Source

Word of the Day

Difficulty index for dimethylbenzene

Few English speakers likely know this word

Word Value for dim

6
7
Scrabble Words With Friends

Quotes with dim-ethylbenzene

Nearby words for dim-ethylbenzene