Conclusions
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1.
The reaction of aluminum trialkyls and dialkylaluminum chlorides with the water of CuSO4·5H2O in an aromatic hydrocarbon proceeds via the hydrolysis of one of the Al-C bonds and makes it possible to obtain the pure alkyl- and alkylchloroalumoxanes in high yields.
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2.
In the ability of the Al-C bond to undergo hydrolysis, the organoaluminum compounds can be arranged in the following order: C2H5AlCl2>(C2H5)2AlCl >(C2H5)3Al, which coincides with the order of the Lewis acid properties of aluminum compounds, and is the opposite of the order of their ability to be reduced.
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3.
The formation rate of the alumoxanes decreases when benzene is replaced by its alkyl derivatives.
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4.
The reaction of the water of CuSO4·5H2O with organoaluminum compounds begins with dehydration of the salt, which represents a topochemical reaction that is described by the Erofeev-Kolmogorov equation.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2547–2553, November, 1975.
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Razuvaev, G.A., Sangalov, Y.A., Nel'kenbaura, Y.Y. et al. Synthesis of alumoxanes by reactions of organoaluminum compounds with copper sulfate crystallohydrate. Russ Chem Bull 24, 2434–2440 (1975). https://doi.org/10.1007/BF00921661
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DOI: https://doi.org/10.1007/BF00921661