ABSTRACT
The study of pure and doped metal clusters has become an interesting and rapidly progressing research topic over the past decades. This is because of their structural richness, unexpected stability and reactivity patterns, the variation of these properties with respect to the number of the constituting atoms, and also because of the observed aromaticity in certain species. Similarly to an organic compound [1], the aromaticity of a metal cluster is showed by the coexistence of different properties such as equalized bond lengths and bond orders, the thermodynamic stability, specic reactivity, magnetic behavior, and the closed electronic structure.
