B. Rojano, J. Sáez, G. Schinella
Apr 17, 2008
Citations
4
Influential Citations
72
Citations
Quality indicators
Journal
Journal of Molecular Structure
Abstract
Abstract 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.