Bis(η5-pentamethylcyclopentadienyl)aluminium tetrabromidoaluminate

Abstract

The title compound, [Al(C10H15)2][AlBr4], was formed during the reduction of a mixture of Cp*AlBr2 and AlBr3. The AlIII atoms of the two crystallographically independent cations each lie on an inversion center, and the [AlBr4]− anions are on general positions. At 123 K, the structure exhibits disorder in two of the Br atoms of the [AlBr4]− ion, with a ratio occupancy of 0.733 (6): 0.267 (3). In the crystal, there is possible weak hydrogen bonding between some methyl groups and Br atoms. The interactions link the moieties in a three-dimensional array.