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Muchalal Muchalal
Chemistry Department, Faculty of Mathematics and Natural Sciences Gadjah Mada University, Yogyakarta
Chemical Engineering, Chemistry & Bioengineering Chemistry

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EFFECTS OF ETHYLENE GLYCOL AND KOH IN THE FORMATION OF 2-METHOXY-4-PROPYLPHENOL ON EUGENOL ISOMERIZATION REACTION Muchalal Muchalal
Indonesian Journal of Chemistry Vol 5, No 1 (2005)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (226.561 KB) | DOI: 10.22146/ijc.21841

Abstract

Formation reaction mechanism of  2-methoxy-4-propylphenol on eugenol isomerization that involved protic hydrogen originated from ethylene glycol as a solvent has been done. To check this reaction mechanism, the effect of amounts of ethylene glycol as a solvent and KOH as a reagent on the quantity of 2-methoxy-4-propylphenol as a product has been carried out. The reaction product was analyzed by GC and GC-MS. Quantity of 2-methoxy-4-propylphenol as a product increased if ratio of quantity of ethylene glycol as solvent to quantity of KOH as reagent became larger. The result showed that formation process of 2-methoxy-4-propylphenol involved the protic hydrogen of solvent. The existence of cis-isoeugenol as an initiator compound in forming 2-methoxy-4-propylphenol indicated that the reaction mechanism followed the steps (1) cis-isoeugenolic ion gave Cb with negative charge at prophenyl group through resonance (2) a negative charge Cb then attacked a protic H atom in the solvent, and (3) hydride ion will attack Cb to form 2-methoxy-4-propylphenolic ion.
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