Synthesis and coordination behaviour of aluminate-based quinolyl ligands

Abstract

The effects of moving the donor N-atom from the 2-position in lithium (2-pyridyl)- and (2-quinolyl)aluminates to the more remote position in (8-quinolyl)aluminates have been investigated by solid-state structural and DFT computational studies of the new complexes [{EtAl(2-qy)3}Li(μ-X)Li(THF)3] (X = Cl/Br 62 : 38) [(1)Li(μ-X)Li(THF)3], [{(EtAl(2-qy)3)Li}2(μ-Br)]Li(THF)4+ [{1Li}2(μ-Br)]Li(THF)4+, [{EtAl(2-Me-8-qy)3}Li] [(2)Li], [{Me2Al(2-Me-8-qy)2}Li(THF)] [(3a)Li(THF)], [{Me2Al(6-Me-2-py)2}Li(THF)2] [(4)Li(THF)2] and [{{EtAl(2-Me-8-qy)2}2O}(Li2THF)] (5). Increasing the remoteness of the donor N-atom from the bridgehead results in large differences in the coordination of the Li+ cations by the (8-quinolyl)aluminate anions compared to 2-quinolyl or 2-pyridyl counterparts. The results are of potential interest in understanding how the coordination sites of ligands of this type can be tuned for the coordination requirements of specific metal centres.

Graphical abstract: Synthesis and coordination behaviour of aluminate-based quinolyl ligands

Supplementary files

Article information

Article type
Paper
Submitted
23 Jul 2021
Accepted
12 Aug 2021
First published
13 Aug 2021

Dalton Trans., 2021, Advance Article

Synthesis and coordination behaviour of aluminate-based quinolyl ligands

J. E. Waters, S. Hanf, M. Rincón-Nocito, A. D. Bond, R. García-Rodríguez, D. S. Wright and A. L. Colebatch, Dalton Trans., 2021, Advance Article , DOI: 10.1039/D1DT02438H

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