Bond energies for molecules, clusters, and deposit systems

Area of Science:

• Computational chemistry
• Materials science
• Quantum chemistry

Background:

• Accurate assignment of bond energies is crucial for understanding molecular and cluster behavior.
• Existing methods may have limitations in handling complex systems or specific computational approaches.

Purpose of the Study:

• To introduce a new, effective method for assigning bond energies in molecules and clusters.
• To validate the proposed method using semiempirical calculations and a specific deposition system.

Main Methods:

• A shareholder principle is applied to redistribute atomic energy shifts onto molecular bonds.
• The method is designed for semiempirical computational chemistry approaches, focusing on one- and two-center terms.
• MSINDO calculations were employed to test the approach on molecules, clusters, and a copper/magnesium oxide system.

Main Results:

• The shareholder principle method successfully assigns bond energies in the tested molecules and clusters.
• Analysis of copper deposition on magnesium oxide reveals bonding to both oxygen and magnesium sites.
• Copper-copper bonds are identified as the strongest, significantly influencing the structure of copper clusters.

Conclusions:

• The proposed shareholder principle offers a direct and suitable approach for bond energy assignment in semiempirical calculations.
• The method provides valuable insights into bonding interactions, exemplified by the copper/magnesium oxide system.
• Understanding these bonding dynamics is key for predicting the structure and properties of materials.