Quantum Chemical Calculation of Molecular Structures of Al2Fe2 and Al2FeCo Tetranuclear Metalloclusters

Resumo

Using the hybrid density functional method (DFT) of the OPBE/TZVP approximation in the Gaussian09 program package, the geometrical parameters of the molecular structures of the tetranuclear aluminum–iron and aluminum–iron–cobalt metalloclusters of the Al₂Fe₂ and Al₂FeCo stoichiometric compositions are calculated. It is established that the first cluster can exist in 12 structural modifications and the second cluster in 3 modifications. The values of the bond lengths, and the valence and dihedral (torsion) angles for each of these modifications, are given.