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NMR Investigation on the Solution Structure and Dynamic Behaviour of 1,2-Diphenyl-1,2-bis(trimethylsilyl)ethanediyldilithium

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Fürstner,  Alois
Research Department Fürstner, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Seidel,  Günter
Research Department Fürstner, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

Mons,  Hans-Egbert
Service Department Mynott (NMR), Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Mynott,  Richard
Service Department Mynott (NMR), Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Citation

Fürstner, A., Seidel, G., Mons, H.-E., & Mynott, R. (1998). NMR Investigation on the Solution Structure and Dynamic Behaviour of 1,2-Diphenyl-1,2-bis(trimethylsilyl)ethanediyldilithium. European Journal of Inorganic Chemistry, (11), 1771-1774. doi:10.1002/(SICI)1099-0682(199811)1998:11<1771:AID-EJIC1771>3.0.CO;2-L.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0024-20F7-8
Abstract
1,2-Diphenyl-1,2-bis(trimethylsilyl)ethene (5) undergoes a smooth reductive metallation with metallic lithium to yield the corresponding dilithioethane derivative (Li2·5). The structure of this new compound in [D8]THF solution was determined by NMR spectroscopy (1H, 13C, 6Li, 7Li NMR and 6Li,1H-HOESY). It is shown that the phenyl rings have a high quinoid character and that the lithium cations are relatively mobile.