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Trimethylaluminium methylates the cacodylate anion ([AsMe2O2]–) with the formation of [AsMe4]2[Me2AlO·AlMe3]2, and an X-ray crystal structure has shown the aluminoxane anion to consist of a planar Al2O2 ring with AlMe3 molecules co-ordinated to the oxygen atoms.
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Atwood et al. (1983) studied this question.
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