Huei-ling Chen, B. Ko, A. B. Huang
Oct 26, 2001
Citations
0
Influential Citations
69
Citations
Journal
Organometallics
Abstract
The reaction of 2,2‘-methylenebis(4-chloro-6-isopropyl-3-methylphenol) (MCIMP-H2) with 1.2 molar equiv of AlMe3 in THF yields [(MCIMP)AlMe(THF)] (1), which further reacts with a stoichiometric amount of 2-propanol (IPA), affording the isopropoxy-bridged dimer [(MCIMP)Al(μ-OiPr)]2 (2). Compound 2 can also be obtained by the treatment of MCIMP-H2 with a stoichiometric amount of Al(OiPr)3 in refluxing toluene. However, the reaction of 1 with another 1 equiv of AlMe3 in CH2Cl2 furnishes [Me2Al(μ-MCIMP)AlMe2(THF)] (3), in which the MCIMP2- ligand is acting as a bridging ligand. Further treatment of compound 3 with 2 molar equiv of 2-propanol results in the formation of the isopropoxy-bridged dinuclear aluminum complex [(MCIMP)Al(μ-OiPr)2AlMe2] (4). Compound 4 can be directly obtained from the reaction of 1 with AlMe3 in the presence of 2-propanol. However, in the presence of a stoichiometric amount of H2O, hydrolysis of 1 in THF gives the trimeric aluminum compound [(MCIMP)Al(μ-OH···THF)]3 (5), in which the hy...