P-Dimethylbenzene

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

SYNS CHROMAR p-DIMETHYLBENZENE 1,4-DIMETHYLBENZENE p-METHYLTOLUENE SCINTILLAR 1,4-XYLENE p-X XOL (DOT]... 

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

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 Cs aromatics Dimethylbenzene Dimethyl benzene, m-, o-, and p- Dimethylbenzene (mixed isomers) Methyl toluene... 

The isomers 1,2-dimethylbenzene, 1,3-dimethylbenzene and 1,4-dimethylbenzene also have traditional names 6>-dimethylbenzene, m-dimethylbenzene and p-dimethylbenzene (6>rf/z6>-dimethylbenzene, m fa-dimethylbenzene, and para-dimethylbenzene). If the positions of double bonds were localized, as proposed by Kekule, 1,2-dimethylbenzene and 1,6-dimethylbenzene would be different isomers because the bond between carbons Ci and C2 is double while the bond between Ci and Ce would be a single bond. However, all the experiments have demonstrated that only three isomers exist, hence 1,2-dimethylbenzene and 1,6-dimethylbenzene are identical. Consequently, the classical structure theory which implies that the double bonds are localized is unable to describe the structures of the benzene molecule and other aromatic compounds. 

Materials. Anisole (1), terephthalonitrile (2) m-cyanoanisole (3b), o- and p-dimethylbenzenes (5a and c), 15-crown-5, 18-crown-6, benzonitrile, and KCN, were purchased. CH2CI2 was distilled from CaH2. PEG 200- 1000 (Nakarai Chem. Co) were dried azeotropically by benzene. Ortho- and para-cyanoanisoles (3a and 3c ) were prepared according to the methods of the literatures. 1,3-Pentadiene and acetone were distilled directly before use. 

A model pathway of ion-pairing mechanisms can be shown on the above-mentioned, dually acting carbon paste binder tricresyl phosphate (TCP) as an example. This mixture of isomers is commercially available and, in electroanalysis with CPEs, an already well-established pasting liquid.Abbreviating the o,wi,p-dimethylbenzene groups by Ar , the process can be described by Eqs. (5.13a) and (5.13b) ... 

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