K. Bakthavachalam, N. Reddy
May 24, 2013
Citations
0
Influential Citations
41
Citations
Journal
Organometallics
Abstract
The synthesis and characterization of 1,5-bis(2,6-diisopropylphenyl)-2,4-diphenyl-1,3,5-triazapenta-1,3-diene (L1H), a triaza ligand, and Al complexes of its anion are reported. A neat condensation reaction between N-(Dipp)benzamidine (Dipp = 2,6-diisopropylphenyl) and N-(Dipp)benzimidoyl chloride affords L1H in good yield. The Al complexes [L1AlMe2] (1), [L1AlMe(Cl)] (2), and [L1AlCl2] (3) are prepared by treating L1H with a slight excess of AlMe3, AlMe2Cl, and AlMeCl2, respectively, in toluene. Further, the aluminum complexes [L2AlMe2] (5), [L2AlMe(Cl)] (6), and [L2AlCl2] (7) are obtained in good yields from 1,3-bis(2-pyridylimino)isoindoline (L2H) in a similar fashion. The ligand L1H and complexes 1, 2, and 4–6 have been structurally characterized. All of the complexes have been explored for their catalytic activity toward the ring-opening polymerization (ROP) of e-caprolactone. It has been found that [L1AlMe2], upon the addition of cocatalyst (benzyl alcohol), gives a tetranuclear Al alkoxide (8), whi...