Hydrolytic Synthesis of an Alumoxane Hydride Bearing Terminal Pyrazolato Ligands

Abstract

The novel alumoxane hydride [(μ-η1:η1-3,5-tBu2pz)2(η1-3,5-tBu2pz)2(μ3-O)(μ-Al)3H3]·2THF (2; 3,5-tBu2pz = 3,5-tert-butylpyrazolato) is formed when aluminum dihydride [(μ-η1:η1-3,5-tBu2pz)(μ-Al)H2]2 (1) is reacted with 1 equiv of water. The core of compound 2 consists of two tetra- and one hexacoordinated Al atoms with short Al−O bonds. The two central N2Al2O ring systems share a common Al−O edge with a hexacoordinated Al atom, and two of the pyrazolato ligands bind in an η1 and μ-η1:η1 arrangement.