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Issue 13, 2016
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Exposing elusive cationic magnesium–chloro aggregates in aluminate complexes through donor control

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Abstract

The cationic magnesium moiety of magnesium organohaloaluminate complexes, relevant to rechargeable Mg battery electrolytes, typically takes the thermodynamically favourable dinuclear [Mg2Cl3]+ form in the solid-state. We now report that judicious choice of Lewis donor allows the deliberate synthesis and isolation of the hitherto only postulated mononuclear [MgCl]+ and trinuclear [Mg3Cl5]+ modifications, forming a comparable series with a common aluminate anion [(Dipp)(Me3Si)NAlCl3]. By pre-forming the Al–N bond prior to introduction of the Mg source, a consistently reproducible protocol is reported. Usage of the green solvent 2-methyltetrahydrofuran in place of THF in the context of Mg/Al battery electrolyte type complexes is also promoted.

Graphical abstract: Exposing elusive cationic magnesium–chloro aggregates in aluminate complexes through donor control

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Supplementary files

Article information


Submitted
05 Feb 2016
Accepted
19 Feb 2016
First published
22 Feb 2016

This article is Open Access

Dalton Trans., 2016,45, 5590-5597
Article type
Paper
Author version available

Exposing elusive cationic magnesium–chloro aggregates in aluminate complexes through donor control

E. V. Brouillet, A. R. Kennedy, K. Koszinowski, R. McLellan, R. E. Mulvey and S. D. Robertson, Dalton Trans., 2016, 45, 5590
DOI: 10.1039/C6DT00531D

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