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Methylmethacrylate complexes of sterically hindered aluminum aryloxides: activation of methacrylic esters |
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| Authors: | Matsujiro Akakura Hisashi Yamamoto Simon G Bott Andrew R Barron |
| Institution: | a Department of Chemistry, Rice University, Houston, TX 77005, U.S.A. b Department of Chemistry, School of Engineering, Nagoya University, Chikusa, Nagoya 464-01, Japan c Department of Chemistry, University of Houston, Houston, TX 77004, U.S.A. |
| Abstract: | The interaction of AlR2(BHT)(OEt2) and AlMe(BHT)2 with methylmethacrylate (MMA) leads to the formation of the Lewis acid-base complexes AlR2(BHT)(MMA) R = Me (1), Et (2)] and AlMe-(BHT)2(MMA) (3), respectively. The molecular structure of 1 has been determined by X-ray crystallography. The decrease in the C=O and C=C stretching frequencies in the IR spectrum, and downfield shift in the 13C NMR spectrum of the  - and γ-carbons of the MMA, when compared to free MMA, is presented with respect to the activator ability of sterically crowded aryloxide compounds of aluminum to aluminum-porphyrin catalyzed (Inoue) polymerization of MMA. |
| Keywords: | aluminum aryloxide methylmethacrylate activation |
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