the formation of the hexamer 1 according to Equation (a) is plausible, since the resulting high Al ~A l binding energy in the alkylated aluminum clusters (see also [lo]) obtained in the quantum chemical calculations has the result that the oligomers [(AltBu),] with n < 6 are energetically disfavored in comparison with the hexamer. whereas. the cleavage of larger clusters is very unlikely under the given experimental conditions. Moreover. thereare no indications in the EPR and NMR spectra of radical anions or dianions. which would he expected had reduction of other oligomers occurred.[17] The computations were performed with the program system TURBO-MOLE (R.
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