ChemInform Abstract: Observation of All-Metal Aromatic Molecules.
Abstract
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ChemInform Abstract
Bimetallic clusters MAl4- (M: Li, Na, Cu) are produced with a laser vaporization supersonic cluster source using a Cu/Al alloy or Al/Li2CO3 (Na2CO3) composite target. The clusters are investigated by photoelectron spectroscopy and ab initio calculations. The most stable structure for all three MAl4- species is a square pyramid consisting of an M+ cation coordinated to a Al42- unit. The Al42- group exhibits characteristics of aromaticity with two delocalized π electrons (thus following the 4n + 2 electron counting rule) and a square planar structure.
