Thermodynamics of Synthesis of New Phenoxazine Derivatives – Pages 16-20

Thermodynamics of Synthesis of New Phenoxazine Derivatives – Pages 16-20
V. José Cotuá1, Sandra Cotes2, Fernando Castro1 and Pedro Castro1

1Grupo de Investigación Max Planck, Universidad del Atlántico, Facultad de Química y Farmacia, Km 7 Antigua Vía a Puerto Colombia, Barranquilla, Colombia; 2Universidad del Norte, Departamento de Química y Biología, Km 5 Antigua Vía a Puerto Colombia, Barranquilla, Colombia

http://dx.doi.org/10.6000/1927-5129.2013.09.03

Abstract: This article describes a semi-empirical study on the thermodynamics involved in the synthesis of three novel orthometa and para, potentially intercalatingphenoxazine 1 derivatives o-(6), m-(7) and p-(8)Quantum chemical calculations at the semi-empirical PM3 method were used in order to evaluate conformational states of the molecules, as well as to predict thermodynamic properties and equilibrium constants. The more favourable product was found to be the compound with the methoxy group in ortho-position. The methoxy group in para-position hinders the reaction by steric factor, which is reflected from the small constant, Kp.

Keywords: Phenoxazine, PM3 calculation, conformational structures, equilibrium constant, thermodynamics.