Applying the Jellium model to octacarbonyl metal complexes

Area of Science:

• Inorganic Chemistry
• Computational Chemistry
• Quantum Chemistry

Background:

• Octacarbonyl metal complexes M(CO)₈ (M = Ca, Sr, Ba) exhibit novel bonding characteristics.
• These complexes feature high coordination numbers and unique electronic configurations.

Purpose of the Study:

• To investigate the electronic structures of octacarbonyl metal complexes M(CO)₈.
• To demonstrate the applicability of the Jellium model beyond metal clusters.

Main Methods:

• Analogical comparison between [Ba(CO)₈]^2- and metal clusters [BaBe₈]^2-.
• Application of the Jellium model to various M(CO)₈ species with different metal ions (M) and charges (q).

Main Results:

• The Jellium model is a viable tool for understanding the electronic structures of M(CO)₈ complexes.
• A 20-electron model with the configuration |1S²|1P⁶|1D¹⁰|1F²| accurately describes the valence bonding.
• Each coordinative bond in M(CO)₈ species comprises 7/8 bonding and 1/8 non-bonding orbitals.

Conclusions:

• The Jellium model provides a robust framework for analyzing the electronic properties of octacarbonyl metal complexes.
• The findings offer a deeper understanding of the bonding intricacies in these highly coordinated metal carbonyls.