Global Journal of Pure and Applied Chemistry Research (GJPACR)

EA Journals

4dinitrophenylhydrazone

Selective transformation of menthone from the essential oil of Mentha piperata L. into menthone 2,4-dinitrophenylhydrazone and UV-visible spectrophotometric analysis (Published)

The essential oil of Mentha piperata L., brown in color, was extracted by hydrodistillation from leaf stems collected in the southern district of Brazzaville (Bacongo), with a yield of 0.42 %. Analysis by gas chromatography (GC) and by gas chromatography coupled with mass spectrometry (GC/MS) revealed the presence of thirty (30) constituents of which twenty (20) were identified representing a proportion of (93.26 %) of the chemical composition of the total essential oil. The essential oil consists mainly of monoterpenes (92.47 %) with a predominance of oxygenated monoterpenes (89.43 %) dominated by menthol (44.08 %), followed by menthone (14.49 %), menthyl acetate (13.54 %) ), mint furanone 1 (7.81 %) and menthofuran (3.04 %). Hydrocarbon monoterpenes occupy a low level of (3.04 %) characterized by limonene (2.71 %), orthocymene (0.37 %), β-pinene (0.35 %) and α-pinene (0.15 %). Concerning the group of sesquiterpenes, this represents a minimal rate (0.79 %), oxygenated compound are predominant (0.57 %) marked by caryophyllene oxide (0.40 %) and viridiflorol (0.17 %). We note the presence of a single hydrocarbon sesquiterpene, E caryophyllene occupying a small proportion of (0.22 %).Menthone 2,4-dinitrophenylhydrazone was hemi-synthesized by reacting the essential oil of Mentha piperata with 2,4-dinitrophenylhydrazine in the presence of sulfuric acid, a simple, easy method occurring in a rapid time (five minutes ). The rate of conversion of menthone to menthone 2,4-dinitrophenylhydrazone of orange color is 29 %.Analysis of menthone 2,4-dinitrophenylhydrazone by UV-visible spectrophotometry showed an absorption maximum wavelength of 356 nm. The UV-visible spectrophotometric method employed for the determination of this hydrazone is convenient, fast and simple. The hemi-synthesized menthone 2,4-dinitrophenylhydrazone could be useful in the pharmaceutical, agrochemical, perfume and cosmetic industries.

Citation: NDZELI LIKIBI Belline, LOUBAKI Laurent, NSIKABAKA Samuel, OUAMBA Jean-MaurilleS(2021) Selective transformation of menthone from the essential oil of Mentha piperata L. into menthone 2,4-dinitrophenylhydrazone and UV-visible spectrophotometric analysis, Global Journal of Pure and Applied Chemistry Research, Vol.9, No.1, pp.1-20

Keywords: 4dinitrophenylhydrazone, Essential oil, Mentha piperata L., UV-visible spectrophotometry, menthone, menthone 2, wavelength.

Scroll to Top

Don't miss any Call For Paper update from EA Journals

Fill up the form below and get notified everytime we call for new submissions for our journals.