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Published on: October 15, 2019
Modifying the donor properties of tris(pyridyl)aluminates in lanthanide(ii) sandwich compounds
Raúl García-Rodríguez1, Sara Kopf, Dominic S Wright
1GIR MIOMeT-IU Cinquima-Química Inorgánica, Facultad de Ciencias, Campus Miguel, Delibes, Universidad de Valladolid, 47011 Valladolid, Spain. raul.garcia.rodriguez@uva.es.
Abstract:
The coordination ability of tris(pyridyl)aluminates can be modified by the steric and electronic character of substituents at the 6-positions of their pyridyl rings. Whereas [EtAl(6-Me-2-py)3]- (1) coordinates strongly to lanthanide(ii) ions [Eu(ii) and Yb(ii)], [EtAl(6-Br-2-py)3]- (2) forms much weaker complexes, and [EtAl(6-CF3-2-py)3]- does not coordinate at all. The modification of the donor ability of these ligands is investigated by solid-state studies of the Ln(ii) sandwich compounds and by competitive coordination studies in solution.
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