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Proposals for structure and effect of methylalumoxane based on mass balances and phase separation experiments
Author(s) -
Sinn Hansjörg
Publication year - 1995
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19950970105
Subject(s) - tetrahydrofuran , methylaluminoxane , molecule , diethyl ether , metallocene , chemistry , solvent , acetone , ether , benzene , polymer chemistry , phase (matter) , organic chemistry , materials science , polymer , polymerization
Abstract Methylaluminoxane prepared from trimethylaluminium on a surface of ice mainly can be described as [Al 4 O 3 (CH 3 ) 6 ] 4 . This is shown through analysis, phase separation experiments with diethyl ether and molecular weight determinations in benzene, 1, 4‐dioxane, tetrahydrofuran and trimethylaluminium. It is discussed that the reason for forming this ball‐like structure is the saturation of four coordinated Al 4 O 3 (CH 3 ) 6 . This molecule has a cavern which contains a solvent molecule or a molecule of trimethylaluminium. The consequences for the formation of the catalytically active structure together with metallocene are discussed.