7Li residual quadrupolar couplings as a powerful tool to identify the degree of organolithium aggregation.
Lithium in the gel: The NMR spectroscopic properties of common organolithium and lithium amide reagents are investigated in the anisotropic environment of a stretched polystyrene (PS) gel. PS is stable towards reactive organometallic compounds and can be used at low temperatures. The residual quadrupolar couplings (RQCs) from a single (7)Li NMR spectrum can distinguish between high (hexamer, tetramer) and low (dimer, monomer) aggregation states (see scheme).
Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany.
Ann-Christin
AC
Pöppler
Helena
H
Keil
Dietmar
D
Stalke
Michael
M
John
D008094:Lithium / Q000737:chemistry*; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000737:chemistry*
D009942:Organometallic Compounds; D008094:Lithium