Datensatz

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.