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Updated: Sep 27, 2025

Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex
Published on: July 27, 2022
Synthesis and temperature-dependent NMR studies of monomeric and dimeric tris(dialkylamido)alanes
Erik Schumann1, Uwe Böhme2, Erica Brendler3
1TU Bergakademie Freiberg, Institut für Physikalische Chemie, Leipziger Str. 29, 09599 Freiberg, Germany. Florian.Mertens@chemie.tu-freiberg.de.
Abstract:
After an introductory overview of all currently known tris(dialkylamido)alanes with the formula [Al(NR2)3] (n = 1, 2), a simplified synthetic method based on the usage of is presented. The simplification results from the fact that the ether adduct can already be obtained during the necessary synthesis of the alane moiety and that the use of trimethylamine is no longer required. Current conflicts regarding the experimental data of tris(diethylamido)alane and their interpretation have been resolved by means of single crystal structure analysis. The N-methylpiperazine derivative was described for the first time and characterised by various analytical methods. In temperature-dependent NMR measurements ranging from -35 °C to 90 °C coalescence phenomena of 13C and 1H NMR signals of tris(N-methylpiperazino)alane as well as thermal migration of 1H NMR signals of tris(diethylamido)alane were observed.
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