Abstract
The electronic structure and surface reactivity of poly[ethylenediaminetetraacetato-aqua-disodium-nickel(II)] were investigated using molecular electrostatic potential (MEP) and molecular surface analyses. The calculated MEP surface revealed pronounced charge separation, where the oxygen atoms of the carboxylate groups represent electron-rich regions, while the hydrogen atoms and the coordination environment around the Ni(II) center exhibit positive electrostatic potential. Electron density mapping demonstrated effective charge delocalization between the EDTA ligand and the nickel ion, indicating strong metal–ligand interactions. Surface reactivity analysis further identified the oxygen-containing functional groups as the most favorable sites for electrophilic attack. The balanced distribution of electrostatic potential and electron density suggests high electronic stability and an ordered coordination environment. These findings provide insight into the relationship between the electronic structure and chemical reactivity of the synthesized nickel(II)-EDTA coordination polymer.
References
1. Politzer, P., Murray, J. S. (2019). Molecular Electrostatic Potentials: Concepts and Applications. Theoretical Chemistry Accounts, 138, 1–18.
2. Lu, T., Chen, F. (2012). Multiwfn: A multifunctional wavefunction analyzer. Journal of Computational Chemistry, 33, 580–592. https://doi.org/10.1002/jcc.22885
3. Foreman, M. M., Alessio, M., Krylov, A. I., Johnson, M. A. (2023). Influence of transition metal electron configuration on the structure of metal–EDTA complexes. Journal of Physical Chemistry A, 127, 1135–1145. https://doi.org/10.1021/acs.jpca.2c07996
4. Parr, R. G., Yang, W. (1989). Density Functional Theory of Atoms and Molecules. Oxford University Press.
5. Geerlings, P., De Proft, F., Langenaeker, W. (2003). Conceptual Density Functional Theory. Chemical Reviews, 103, 1793–1874.
6. Bader, R. F. W. (1994). Atoms in Molecules: A Quantum Theory. Oxford University Press.Murray, J. S., Politzer, P. (2017). The electrostatic potential: An overview. Wiley Interdisciplinary Reviews: Computational Molecular Science, 7, e1326.
7. Jensen, F. (2017). Introduction to Computational Chemistry (3rd ed.). John Wiley & Sons.