Computational characterization of sodium selenite using density functional theory

Area of Science:

• Computational Chemistry
• Materials Science

Background:

• Sodium selenite is a compound with potential applications in agriculture.
• Understanding its electronic structure and reactivity is crucial for its effective use.

Purpose of the Study:

• To calculate the molecular and crystalline structures of sodium selenite using density functional theory.
• To determine key reactivity parameters and assess sites of potential chemical attack.

Main Methods:

• Density Functional Theory (DFT) calculations.
• Comparison of calculated structural data with experimental results.
• Determination of ionization potential, electron affinity, and global reactivity indices.
• Calculation of selectivity using Fukui functions and Mulliken charges.

Main Results:

• Structural parameters were calculated and compared with experimental data.
• Ionization potential and electron affinity values varied based on calculation method (vertical vs. adiabatic energies).
• Electrophilic index values were consistent across methods.
• Sodium atoms were identified as the most sensitive sites for nucleophilic attack.

Conclusions:

• The study provides theoretical data on sodium selenite's structure and reactivity.
• Findings can assist in the characterization of compounds for crop biofortification.
• Further investigation using Atoms in Molecules (AIM) is recommended for selectivity characterization.