Aromaticity in a Surface Deposited Cluster: Pd4 on TiO2 (110)
Abstract
We report the presence of σ-aromaticity in a surface deposited cluster, Pd4 on TiO2 (110). In the gas phase, Pd4 adopts a tetrahedral structure. However, surface binding promotes a flat, σ-aromatic cluster. This is the first time aromaticity is found in surface deposited clusters. Systems of this type emerge as a promising class of catalyst, and so realization of aromaticity in them may help to rationalize their reactivity and catalytic properties, as a function of cluster size and composition.
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