Raman spectroscopy of a family of organoaluminum compounds

Abstract

Raman spectroscopy was used for the study of a sequential family of organoaluminum compounds. The compounds were prepared by redistribution reactions between trimethylaluminum and tri-tertbutoxyaluminum, leading to molecules with all possible ligand combinations. In the liquid phase, these compounds exist as dimers linked by bridging ligands involved in three-center bonding. Terminal groups are exchanged first followed by the bridging groups. Characteristic group wavenumbers and molecular modes were compared at every stage of redistribution in the spectral range of 1100-150 cm −1 .

Mixed AggregAte (MAA): A Single Concept for All Dipolar Organometallic Aggregates. 1. Structural Data

“…Comparable structures were highlighted for (pyrrolidino) 3 Al and (piperidino) 3 Al {[( c -C 4 H 8 N) 3 Al] 2 and [( c -C 5 H 10 N) 3 Al] 2 , Table , entries 7b,c} . Finally, with aluminum alkoxide ( t -BuO) 3 Al, also an unsolvated cyclic dimer was identified in nonbasic solvent ([( t -BuO) 3 Al] 2 , Table , entry 8) …”