O-Dimethylbenzene

Synonyms AI3-08197 BRN 1815558 CCRIS 905 1,2-Dimethylbenzene o-Dimethylbenzene EINECS 202-422-2 o-Methyltoluene NSC 60920 UN 1307 1,2-Xylene 2-Xylene o-Xylol. 

Dimethylbenzene, see p-Xylene o-Dimethylbenzene, see o-Xylene m-Dimethylbenzene, see m-Xylene p-Dimethylbenzene, see p-Xylene... 

Figure 11. Charts of indan (8), tetralin (9) and o-dimethylbenzene (10) and numbering of heavy atoms (not using the IUPAC convention).

SYNS o-DIMETHYLBENZENE 1,2-DIMETHYLBENZENE o-METHYLTOLUENE 1,2-XYLENE o-XYLOL... 

DIMETHYLBENZENAMINE see XOAOOO DIMETHYLBENZENE see XGSOOO m-DIMETHYLBENZENE see XHAOOO o-DIMETHYLBENZENE see XHJOOO p-DIMETHYLBENZENE see XHSOOO... 

AI3-08197 Benzene, 1,2-dimethyl- Benzene, o-di-methyl- CCRIS 905 o-Dimethylbenzene EINECS 202-422-2 HSDB 134 0-Methyltoluene NSC 60920 UN1307 Xylene, 0- o-Xylene o-Xylol Solvent and raw material for preparation of organic compounds, mp = -25.2° bp= 144.5° d ss10 = 0.8802 Am = 262, 270 nm (c = 254, 211, MeOH) insoluble in H2O, freely soluble in EtOH, Et20, MezCO, CsHe, CCI4, petroleum ether. 

Dimethylbenzene. See Xylene 1,2-Dimethylbenzene. Seeo-Xylene 1,4-Dimethylbenzene. See p-Xylene o-Dimethylbenzene. Seeo-Xylene p-Dimethylbenzene. See p-Xylene N,N-Dimethylbenzeneamine. See N, N-Dimethylaniline Dimethyl 1,2-benzenedicarboxylate. See Dimethyl phthalate N,N-Dimethylbenzenemethanamine. See N-Benzyidimethylamine m-, 0-, and p-Dimethylbenzene (mixed isomers). See Xylene... 

Synonyms Benzene, 1,2-dimethyl 1,2-Di methyl benzene o-Dimethylbenzene o-Methyltoluene 1,2-Xylene o-Xylol... 

How many products might be formed on chlorination of o-xylene (o-dimethylbenzene), m-xylene, and p-xylene ... 

Because of cyclic delocalization, structures A and B shown here for o-dimethylbenzene (o-xylene) are simply two resonance forms of the same molecule. Can the same be said for the two dimethylcyclooctatetraene structures C and D Explain. 

A similar procedure can be applied to mixtures of 1,2-dimethylbenzene (o-xylene) and 1,4-dimethylbenzene (p-xylene). 

Chemical names Phosphorothioic acid 0-[4-[(dimethylamino) sulfonyl], phenyl] 0,0-dimethyl ester Phosphorothioic acid, 0,0-dimethyl-, O-ester with p-hydroxy-/V,/V-dimethylbenzene sulfonamide Phosphorothioic acid, 0,0-dimethyl O-p-(dimethylsulfamoyl) phenyl ester O-Dimethyl hydrogen phosphorothioate, O-ester with p-hydroxy-/V,/V-dimethylbenzenesulfonamide 0-[4-1 (Dimethylamino) sulfonyl] phenyl phosphorothioic acid O.O-dimethyl ester O,O-Dimethyl O, p-(N,N-dimethylsulfamoyl) phenyl phosphorothioate O, p-(Dimethylsulfamoyl) phenyl O.O-dimethyl phosphorothioate p-(Dimethylsulfamoyl)phenyl dimethyl phosphorothioate O.O-dimethyl 0-[p-(dimethylsulfamoyl)-phenyl] phosphorothioate Dimethyl p-(dimethylsulfamoyl) phenyl phosphorothionate O.O-dimethyl-O, p-(dimethylsulfamoyl) phenyl phosphorothionate... 

Anthraquinone itself is traditionally available from the anthracene of coal tar by oxidation, often with chromic acid or nitric acid a more modern alternative method is that of air oxidation using vanadium(V) oxide as catalyst. Anthraquinone is also produced in the reaction of benzene with benzene-1,2-dicarboxylic anhydride (6.4 phthalic anhydride) using a Lewis acid catalyst, typically aluminium chloride. This Friedel-Crafts acylation gives o-benzoylbenzoic acid (6.5) which undergoes cyclodehydration when heated in concentrated sulphuric acid (Scheme 6.2). Phthalic anhydride is readily available from naphthalene or from 1,2-dimethylbenzene (o-xylene) by catalytic air oxidation. 

Synonyms AI3-00262 Avolin 1,2-Benzenedicarboxylic acid, dimethyl ester BRN 1911460 C-11233 Caswell No. 380 CCRIS 2674 Dimethyl-1,2-benzenedicarboxylate Dimethylbenzene-o-dicarboxylate DMP EINECS 205-011-6 ENT 262 EPA pesticide chemical code 028002 Fermine Methyl phthalate Mipax NSC 15398 NTM Palatinol M Phthalic acid, dimethyl ester o-Phthalic acid, dimethyl ester Phthalic acid methyl ester o Phthalic acid, dimethyl ester RCRA waste number U102 Solvanom Solvarone. 

Xilite o Trinitrometaxilolo (TNX or Trinitro-m-dimethylbenzene). It is very briefly described in Belgrano (Ref 31, pp 248—49). It was used during WWI in mixtures with AN, such as in NX, contg AN 77 xilite 23%. Another mixture was MTX which contd PA 55, TNT 35 xilite 10%... 

Problem 10.28 (a) Draw two Kekule structures for l,2-dimethylbenzene(o-xylene), b) Why are these structures not isomers What are they (c) Give the carbonyl products formed on ozonolysis. M... 

FeN2OjC2,Hi , Iron, tricarbonylbis(2-isocy-amo-l,3-dimethylbenzene)-, 26 54 Fe O WCmHw. Tungstate(2-), nona-carbonyliron-... 

Aromatic hydrocarbons which have methyl side chains mainly behave like toluene and form aldehydes, while combustion is stimulated and selective oxidation of the nucleus is repressed. The oxidation of methyl-naphthalene, for example, exhibits a low selectivity with respect to phtha-lic anhydride formation, combustion and maleic acid formation being the dominating reactions. Durene is a special case because it resembles o-xy-lene. The oxidation of durene over a V—W—O catalyst at 420° C is reported to produce pyromellitic dianhydride, phthalic and maleic anhydride, although combustion dominates (Geiman et al. [122]). 1,2,4-Trimethyl-benzene yields dimethylbenzene and trimellitic acid if oxidized on a Sn— V—O catalyst. Kinetic data have been measured by Balsubramanian and Viswanath [37]. 

When there are two or more substituents on a benzene ring, structural isomerization can result. For instance, there are three possible isomers of xylene (dimethylbenzene). The isomers are commonly designated as ortho, meta, and para. A letter (o, m, or p) designates the isomeric position. 

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