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Structural Studies on (–)‐Sparteine‐Coordinated Lithiosilanes
Author(s) -
Däschlein Christian,
Strohmann Carsten
Publication year - 2009
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200800792
Subject(s) - sparteine , chemistry , monomer , silicon , ligand (biochemistry) , lithium (medication) , diastereomer , crystallography , atom (system on chip) , molecule , stereochemistry , quantum chemical , nmr spectra database , computational chemistry , spectral line , organic chemistry , polymer , medicine , biochemistry , receptor , computer science , embedded system , endocrinology , physics , astronomy
A series of (–)‐sparteine‐coordinated lithiosilanes was synthesised and studied by X‐ray structural analysis. All lithiosilanes are monomers in the solid state; yet, increasing sizes of substituents at silicon significantly influences their molecular structures. Due to the given stereochemistry of the dinitrogen (–)‐sparteine ligand, all systems possess stereoinformation. NMR spectroscopic studies were used to obtain deeper insight into the structures of these compounds in solution. Observed coupling between the silicon and lithium atoms as well as the presence of only one signal for each atom in the NMR spectra are indicative of monomeric structures of the lithiosilanes in solution. Additional quantum chemical calculations on one of the examined (–)‐sparteine‐coordinated systems provided very small energy differences between the diastereomers.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)