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作者单位:Alexandre C. Bertoli (1) Jerusa S. Garcia (1) Marcello G. Trevisan (1) Teodorico C. Ramalho (2) Matheus P. Freitas (2)
1. Instituto de Química, Universidade Federal de Alfenas, UNIFAL, Alfenas, MG, 37130-000, Brazil 2. Departamento de Química, Universidade Federal de Lavras, Lavras, MG, 37200-000, Brazil
The use of theoretical calculation to determine structural properties of fulvate-metal complex (zinc, copper and iron) is here related. The species were proposed in the ratio 1:1 and 2:1 for which the molecular structure was obtained through the semi-empirical method PM6. The calculation of thermodynamic stability (\(\Delta H_{(aq.)}^{0}\)) predicted that the iron complex were more exo-energetic. Metallic ions were coordinated to the phtalate groups of the model-structure of fulvic acid Suwannee River and the calculations of vibrational frequencies suggested that hydrogen bonds may help on the stability of the complex formation.