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Schlagwörter:
Aluminum; Main group elements; Hydrogen; Crystal growth; Structure elucidation
Zusammenfassung:
The field of frustrated Lewis pair chemistry offers many opportunities to activate molecular hydrogen, but Al−N systems have not been established yet. In this work, we describe several intermolecular classical Al−N Lewis pairs and an intramolecular ortho‐ala‐aminoarene for the activation of molecular hydrogen. Their ability was investigated using the isotope exchange reaction from HD to H2 and D2. The herein studied intermolecular Lewis pairs were based on alkylalanes and N‐methyldiphenylamine, while the intramolecular Lewis pair was (o‐TMP−C6H4)AlH2 ((2‐(2,2,6,6‐tetramethyl‐piperidin‐1‐yl)phenyl)‐aluminium dihydride). The activation of molecular hydrogen was carried out in toluene under mild conditions and monitored by 1H and 2H NMR spectroscopy. Furthermore, the Al−N interaction has been probed by 27Al NMR and crystallographic studies. Additionally, the crystal structure of pure AliBu3 was determined. These studies may attribute the pronounced reactivities of these Al−N compounds to elongated Al−N bond lengths.
