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In more detail, diatomic M clusters (M\u2009=\u2009Cu, Ag, and Au) were used in a series of homodimer and homotrimer complexes, where they acted as both electron donor and acceptor counterparts. The results were analyzed using several state of the art quantum chemistry tools, such as the quantum theory of atoms in molecules (QTAIM), the natural nond orbital (NBO), the non\u2010covalent interaction plot (NCIplot), and the energy decomposition analyses (EDA) methodologies. 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