Author(s)

Najlaa S. Al-Radadi¹, Magda M. Akl², Mohamed A. Elbeshlawi², Mohsen M. Mostafa^2*

¹Chemistry Department, Faculty of Science, Taibah University, Al-Madinah, Saudia Arabia.
²Chemistry Department, Faculty of Science, Mansoura University, Mansoura, Egypt.

The coordination behavior of 2,3-butanedionemonoxime Girard’s T hydrazone (L¹) towards Hg²⁺ ion has been investigated. The structure of Hg²⁺ complex, [Hg(L¹)Cl]Cl·5H₂O, is elucidated using elemental analyses, spectral (IR, UV-visible, 1H-NMR and mass) and TGA measurements. IR spectrum suggests that L¹ behaves in a bidentate manner through the azomethine groups. The molecular modeling of L¹ and its Hg²⁺ complex has been investigated. The bond lengths, bond angles, HOMO and LUMO have been calculated. The thermal behavior and kinetic parameters are determined using Coats-Redfern method. The use of L¹ for preconcentration and separation via flotation of Hg²⁺ complex and determination using cold vapor atomic spectrometry (CVAAS) is described. The effects on the percentage of recovered Hg²⁺ by pH of sample solutions, oleic acid (HOL) concentration, Hg²⁺ and L¹ concentrations are studied in details. The method is applied for the determination of the total Hg²⁺ (mg·mL^-1) in natural water samples.

Mercury Complex, 2, 3-Butanedionemonoxime Girard’s T Hydrazone, Modeling, Spectral Studies, Separation Using Flotation Method

Al-Radadi, N. , Akl, M. , Elbeshlawi, M. and Mostafa, M. (2016) Analytical, Spectral, Thermal and Molecular Modeling Studies of Hg²⁺-2,3-Butanedionemonoxime Girard’s T Hydrazone Complex and Its Application. Open Journal of Inorganic Chemistry, 6, 1-14. doi: 10.4236/ojic.2016.61001.