Observation of All-Metal Aromatic Molecules
摘要：
Aromaticity is a concept invented to account for the unusual stability of an important class of organic molecules: the aromatic compounds. Here we report experimental and theoretical evidence of aromaticity in all-metal systems. A series of bimetallic clusters with chemical composition MAl4-(M = Li, Na, or Cu), was created and studied with photoelectron spectroscopy and ab initio calculations. All the MAl4-species possess a pyramidal structure containing an M+cation interacting with a square Al42-unit. Ab initio studies indicate that Al42-exhibits characteristics of aromaticity with two delocalized π electrons (thus following the 4n + 2 electron counting rule) and a square planar structure and maintains its structural and electronic features in all the MAl4-complexes. These findings expand the aromaticity concept into the arena of all-metal species.
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DOI：
10.1126/science.291.5505.859
被引量：
年份：
2001
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