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Coordination diversity of aluminum centers molded by triazole based chalcogen ligands

Abstract:

Equimolar and excess ratio reactions of AIMe3 and AI'Bu 3 with the ligands 4,5-(P(E)Ph2)2tzH (tz = 1,2,3-triazole; E = O (1), S (2), Se(3)) were performed, showing a vast variety of coordination modes. The products obtained, [AIR2{κ 2-O,O′-[4,5-(P(O)Ph2)2tz]}] (R = Me (4), ′Bu (5)), [AIR2{κ3-N,N′, S-[4,5-(P(S)Ph2)2tz]}(μ-tz)]2 (R = Me (6), R = ′Bu (7)), [AIMe2{κ2-N, Se-[4,5-(P(Se) Ph2)2tz]}] (8), [AI{κ2-A/, Se-[4,5-(P(Se)Ph2)2tz]}3] (9), [AIR 2{κ2-O,O′-[4,5-(P(O)-Ph2) 2 tz]}-(N′-AIR3)] (R = Me (10), ′Bu (11)), and [AIR2{κ2-N, S-[4,5-(P(S)Ph2) 2tz]}-(N′-AIR3)] (R = Me (12), R = ′Bu (13)), were characterized by spectroscopic methods, and the structures of 1, 4, 6, 7, 9, 10, and 12 were obtained through X-ray diffraction studies. Theoretical calculations were performed on the deprotonated ligands and on selected compounds to obtain information regarding the coordination variety observed for these compounds. © 2009 American Chemical Society.