Microtech2010 2010

Ozonolysis of Indigo: A ab initio study

E. Ortiz, H.E. Solís Correa, V. Uc
Universidad Autonoma Metropolitana Azcapotzalco, MX

Keywords: indigo, ozone, dye


The theoretical investigation of the electronic structure calculations of the indigo have been performed with the system of programs Gaussian03, all geometries have been fully optimized with MP2 method using a 3-21G** basis set. These calculations showed that low reactivity can be attributed to its highly stability. The intramolecular hydrogen bridges between amino and carbonyl took the nucleophilic and electrophilic attacks position. This intramolecular interaction was analyzed following the Bader’s atoms in molecules model. In the dimer formation, hydrogen bridges between amino and carbonyl, became intermolecular. Calculations for HOMO and LUMO orbitals indicated that the preferential attack positions are carbons 1, 3 and 6 energy values of indigo – OH interactions confirm that carbon 1 is the likeliest.
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