The gas chromatography of alkyldinitrophenols and the corresponding anisoles

✍ Scribed by D.R Clifford; D.A.M. Watkins

• Book ID: 104146075
• Publisher: Elsevier Science
• Year: 1970
• Tongue: English
• Weight: 310 KB
• Volume: 48
• Category: Article
• ISSN: 1873-3778
• DOI: 10.1016/s0021-9673(01)85587-4

✦ Synopsis

Resa&s

All compounds were resolved except benzene from ethylcyclohexane, n-propylcyclohexane from isopropylcyclohexane, and sec.-butylcyclohexane from ut-butylcyclohexane. Since by simple fragmentation none of the alkylbenzenes studied could give both of these unresolved cyclohexane pairs, lack of resolution was of little consequence. A separate study showed that benzene is only formed in very small relative amounts, so that the detection of products with 'this retention time was attributed predominantly to ethylcyclohexane. The alkylbenzenes studies are listed in Table I, together withthe major reaction products. In all compounds the predicted behaviour was observed, and it was found that, in general, for a given parent compound, the ratio of the amount of an alkylbenzene to the corresponding cyclohexane increased with the number of carbon atoms on the side chain. For example rt-propylbenzene gave rise to small amounts of cyclohexane and methylcyclohexane, and somewhat greater quantities of ethyl-and propylcpclohexane, ethylbenzene and unreacted parent compound. A chromatogram is shown in Fig. I.