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- W2016720384 abstract "Thermochemical parameters of caffeine 1, theophylline 2, xanthine 3, uracil, and imidazole derivatives are determined by quantum chemical calculations. Using the composite G3B3 method, the standard heat of formation of caffeine in the gaseous phase amounts to ΔfHg∘(1)=-243±8kJ·mol-1, which lends a support for the recent experimental value of −237.0 ± 2.5 kcal · mol−1. We also obtain ΔfHg∘(2)=-232±8kJ·mol-1andΔfHg∘(3)=-209±8kJ·mol-1. The adiabatic ionization energies are IEa(1) = 7.9 eV, IEa(2) = 8.1 eV, and IEa(3) = 8.5 eV using B3LYP calculations. The enhanced ability of caffeine to eject electron, as compared to the parent compounds and cyclic components, is of interest with regard to its potential use as a corrosion inhibitor." @default.
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- W2016720384 date "2010-04-01" @default.
- W2016720384 modified "2023-10-18" @default.
- W2016720384 title "Thermochemical parameters of caffeine, theophylline, and xanthine" @default.
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- W2016720384 doi "https://doi.org/10.1016/j.jct.2009.10.006" @default.
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