Sym-Trimethylbenzene

Synonyms The three isomers of trimethyl benzene are mesitylene (1,3,5-trimethylben-zene, sym-trimethylbenzene, 1,3,5-TMB), pseudocumene (1,2,4-trimethyl benzene,... 

SYNS BENZENE, 1,3,5-TRIMETHYL- FLEET-X MESITYLENE TMB TRIMETHYX BENZENE -(ACGIH) sym-TRIMETHYLBENZENE TRIMETHYL BENZOL... 

TRIMETHYL BENZENE see TLM050 sym-TRIMETHYLBENZENE see TLM050 TRIMETHYL BENZENE (ACGIH) see TLM050 TRIMETHYL BENZENE (mixed isomers) see TLL250 TRIMETHYL BENZOL see TLM050 endo-l,7,7-TRIMETHYL-BICYCLO(2.2.1)HEPTAN-2-OL see BMDOOO... 

Polymethylbenzenes undergo nitration more readily as illustrated by the conversion of sym-trimethylbenzene (mesitylene) to nitromesitylene (76%). Durene (sym-tetramethylbenzene) gives dinitrodurene (94%) no mononitrodurene is ever obtained. In the nitration of other polysub-stituted benzenes, certain anomalous reactions occur. Thus nitration of p-cymene (p-isopropyltoluene) and p-diisopropylbenzene gives in part p-nitrotoluene (8%) and p-nitroisopropylbenzene (50%), respectively, each resulting from the replacement of an isopropyl group by the nitro group. 

I Synonyms/Trade Names Mesitylene, Symmetrical trimethylbenzene, sym-Trimethylbenzene ... 

Synonyms Benzene, 1,3,5-trimethyl- Mesitylene TMB Trimethylben-zene Trimethyl-1,3,5-benzene sym-Trimethylbenzene Trimethylbenzol... 

Trimethyl-1,3,5-benzene. See 1,3,5-Trimethylbenzene as-Trimethylbenzene. See 1,2,4-Trimethylbenzene sym-Trimethylbenzene Trimethylbenzol. See 1,3,5-Trimethylbenzene... 

Although the oxidation affects only the alkyl group attached to the benzene nucleus, the presence of more than one methyl group accelerates the oxidation. Thus, in the liquid phase non-catalytic oxidation experiments of Stephens it was found that durene (sym.-tetra methylbenzene) was easily oxidized under conditions that scarcely affected toluene. However, in the presence of water the oxidation of m-xylene or mesitylene (1 3 4-trimethylbenzene) is almost entirely inhibited,128 a fact that Stephens interprets as showing the reversible elimination of water in one... 

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