Details

Autor(en) / Beteiligte

• Rojano, Benjamín
• Saez, Jairo
• Schinella, Guillermo
• Quijano, Jairo
• Vélez, Ederley
• Gil, Andrea
• Notario, Rafael

Titel

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

Ist Teil von

• Journal of molecular structure, 2008-04, Vol.877 (1), p.1-6

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2008

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The present study compares, theoretically and experimentally, the antioxidant power of isoespintanol (2-isopropyl-3,6-dimethoxy-5-methylphenol) 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 ΔBDE and ΔIP 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.