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The present theoretical study was carried out to investigate the NO reduction by CO over a Ti-porphyrin catalyst. Thus, density functional theory with and without the van der Waals correction was employed. The calculated adsorption energies show that the Ti-porphyrin is active in bending the NO and CO molecules. So, we proposed two reaction mechanisms for the NO reduction by CO on Ti-porphyrin. The calculated activation energies show that both mechanisms are plausible and feasible at room temperature. The Ti-porphyrin shows a good catalytic activity to NO reduction by CO compared to conventional Rh cluster catalyst. These results indicate that the Ti-porphyrin is a promising candidate for reducing NO and CO gases from our environment. [ABSTRACT FROM AUTHOR]

Abstract: The reactions of allylic and aliphatic alcohols with ethyl acetoacetate have been investigated at the DFT/B3LYP level using 6-311G(d) basis set. Analysis results of frontier molecular orbital (FMO) interactions, chemical potential μ and electrophilicity index ω according to Fukui and Pearson respectively, provide a good prediction of experimental results. Alkylation or transesterification reaction is predicted reliably by the calculations. [Copyright &y& Elsevier]