Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 17, Issue 12, Pages 3364-3369Publisher
WILEY-BLACKWELL
DOI: 10.1002/chem.201003493
Keywords
alkali metals; benzyl anion; coordination isomerism; monomer; polyamines
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Funding
- UK Engineering and Physical Science Research Council [EP/F063733/1]
- Royal Society/Wolfson Foundation
- European Commission [PIEF-2009-235173]
- EPSRC [EP/F063733/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/F063733/1] Funding Source: researchfish
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Tetraamine Me(6)TREN has been used as a scaffold support to provide coordinative saturation in the complexes PhCH(2)M center dot Me(6)TREN (M = Li, Na, K). The Li derivative displays a Li-C sigma interaction with a pyramidalized CH(2) both in the solid state and in solution, and represents the first example of eta(4) coordination of Me(6)TREN to lithium. In the sodium derivative, the metal cation slips slightly towards the delocalized pi electrons whilst maintaining a partial sigma interaction with the CH(2) group. For the potassium case, coordinative saturation successfully yields the first monomeric benzylpotassium complex, in which the anion binds to the metal cation exclusively through its delocalized pi system resulting in a planar CH(2) group.
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