68 Polypyrazolylaluminates of the Alkali Metals

Wednesday, November 4, 2009: 8:10 AM
Angus (Camino Real Hotel)
Miguel Ángel Muñoz-Hernández , Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Cuernavaca, Mexico
Sara-Ángélica Cortés-Llamas , Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Cuernavaca, Mexico
Miguel-Ángel Velázquez-Carmona , Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Cuernavaca, Mexico
Ramón Hernández-Lamoneda , Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Cuernavaca, Mexico
Minhhuy Hô , Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Cuernavaca, Mexico
The chemistry of heavy group 13 analogs of the polypyrazolylborates is rather undeveloped. The most extensive research in this area is the chemistry of polypyrazolylgallates Me2Ga(R2pz)2] (R = H or Me) and [MeGa(pz)3], and their complexes with transition metals developed by Storr and coworkers. Recently, we pioneered a series of aluminum analogs of the polypyrazolylborates with different alkali ions. In general, the complexes with one or two pyrazolyl ligands on aluminum display anagostic Al–CH3∙∙∙E (E = Li, Na, K) interactions, these interactions are persistent even if complexes were obtained from solutions with THF that normally coordinate alkali ions. Quantum chemical computational methods gave interesting information on the nature of these anagostic interactions that are conclusively not purely electrostatic.
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