Journal
DALTON TRANSACTIONS
Volume 42, Issue 10, Pages 3704-3711Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2dt32204h
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Funding
- UK Engineering and Physical Science Research Council [EP/F063733/1]
- Royal Society (Wolfson research merit award)
- University of Strathclyde RDF Award
- EPSRC [EP/F063733/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/F063733/1] Funding Source: researchfish
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Designed to extend the synthetically important alkali-metal diisopropylamide [(NPr2)-Pr-i; DA] class of compounds, the first example of a hetero-alkali-metallic complex of DA has been prepared as a partial TMEDA solvate. Revealed by an X-ray crystallographic study, its structure exists as a discrete lithium-rich trinuclear Li2KN3 heterocycle, with TMEDA only solvating the largest of the alkali-metals, with the two-coordinate lithium atoms being close to linearity [161.9(2)degrees]. A variety of NMR spectroscopic studies, including variable temperature and DOSY NMR experiments, suggests that this new form of LDA maintains its integrity in non-polar hydrocarbon solution. This complex thus represents a rare example of a KDA molecule which is soluble in non-polar medium without the need for excessive amounts of solubilizing Lewis donor being added.
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