Dimethylaniline


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Dimethylaniline

 

C6H5N(CH3)2, a tertiary aliphatic-aromatic amine; a colorless liquid. Boiling point, 192.5°-193.5°C; density, 0.9557 g/cm3 (20°C); index of refraction n20D, 1.55819. Dimethylaniline is miscible with most organic solvents; its solubility in water is 1.0-1.4 percent (12°C).

Characterisitc reactions of dimethylaniline are the formation of p-nitrosodimethylaniline by the action of nitrosation agents and of 4, 4′-bis(dimethylamine) benzophenone (Michler’s ketone) by the action of phosgene. Dimethylaniline is produced by heating aniline with methanol in the presence of H2SO4 under pressure. It is used in the synthesis of dyes (malachite green, methylene blue, and others) and explosives.

References in periodicals archive ?
Experimentally parameters in ozonation experiments Variable Notation Unit Range Solution pH PH -- 3.34-7.52 Liquid t s 4.6-12.6 residence time Liquid [Q.sub.L] [m.sup.3]/s 0.7-3.0 x flow rate [10.sup.-6] Gas flow [Q.sub.G] [m.sup.3]/s 2-3.5 x rate [10.sup.-6] 2,4- [c.sub.L,2,4-DMA] g/[m.sup.3] 54-200 Dimethylaniline [c.sub.L,2,4-DMA] g/[m.sup.3] 45-182 concentrations Ozone [MATHEMATICAL g/[m.sup.3] 16.3-19.6 concentrations EXPRESSION NOT REPRODUCIBLE IN ASCII] [MATHEMATICAL 9/[m.sup.3] 9.6-20.3 EXPRESSION NOT REPRODUCIBLE IN ASCII] Biodegradability [BOD.sub.7]/ -- 0-0.01 in [COD.sub.in] Biodegradability [BOD.sub.7]/ -- 0.05-0.26 out [COD.sub.out] Table 2.
As triethylamine is an easily volatile component this work focuses on the degradation of dimethylanilines, which are the main toxic components from missile fuel.
In the aliphatic region, three singlets were observed, one at d 2.38 (s, 3H, CH3-1'''), other at d 2.19 (s, 3H, CH3-2') for the dimethyl group and finally at d 1.94 (s, 3H-1') for methyl group of toluene moiety confirming the union of 2,3- dimethylaniline (1) with p-toluenesulfonylchloride (2).
The room temperature catalyst used was methylethylketone peroxide (MEKP) promoted by cobalt naphthenate solution and dimethylaniline. The MEKP came in a 50 wt.% solution with dimethyl pthalate.
The catalyst methylethylketone peroxide (MEKP) is promoted by cobalt naphthenate (CoNap) and dimethylaniline (DMA).