Deoligomerization by cocomplexation: syntheses and structures of aluminum-calcium alkoxides and aryloxides |
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Authors: | Utko Józef Ejfler Jolanta Szafert Sławomir John Łukasz Jerzykiewicz Lucjan B Sobota Piotr |
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Institution: | Department of Chemistry, University of Wroc?aw, F. Joliot-Curie 14, 50-383 Wroc?aw, Poland. |
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Abstract: | Reactions of oligomeric "Ca(dbbfo)2" and Ca9(CH3OCH2CH2O)18(CH3OCH2CH2OH)2 with Al(CH3)3 in toluene gave tetranuclear heterobimetallic Ca(mu-dbbfo){(mu-dbbfo)(mu-CH3)Al(CH3)2}]2 (71%) and polymeric Ca{(mu-CH3OCH2CH2O)(mu-CH3)Al(CH3)2}2 (86%). The latter can be obtained as monomeric THF adduct Ca{(mu-CH3OCH2CH2O)Al(CH3)3}2(THF)2 (78%) when a mixture of solvents is used. The results, including an initial L-lactide polymerization test, are discussed in the context of calcium alkoxo cluster degradation in solution. |
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