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Experimental and theoretical determination of the antioxidant properties of isoespintanol (2-isopropyl-3,6-dimethoxy-5-methylphenol)

✍ Scribed by Benjamín Rojano; Jairo Saez; Guillermo Schinella; Jairo Quijano; Ederley Vélez; Andrea Gil; Rafael Notario

Book ID
103838024
Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
253 KB
Volume
877
Category
Article
ISSN
0022-2860

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✦ Synopsis

The present study compares, theoretically and experimentally, the antioxidant power of isoespintanol (2-isopropyl-3,6-dimethoxy-5methylphenol) isolated from the leaves of Oxandra cf. xylopioides, with its biosyntetic analogue thymol (2-isopropyl-5-methylphenol). Calculations based on the density functional theory at the B3LYP/6-311G(d,p) level allowed us to determine the O-H bond dissociation enthalpy (BDE), and the ionization potential (IP) of isoespintanol and thymol in the gas phase and in solution in water and in methanol. Computed DBDE and DIP values, and FRAP (Ferric Reducing Antioxidant Power) and DPPH (1,1-diphenyl-2-picrylhydrazyl) assays have shown that isoespintanol is twice better antioxidant than thymol.

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