title: Characterization of dimeric chiral lithium amide structures derived from N-isopropyl-O- triisopropylsilyl valinol.
abstract: The dimeric structure is characterized for a chiral amide base complex consisting of an (S)-N-isopropyl-O-triisopropylsilyl valinol ligand and lithium. The complex is characterized by a variety of NMR techniques, including multinuclear one- and two-dimensional NMR experiments and diffusion-ordered NMR spectroscopy (DOSY) as well as diffusion coefficient-formula weight (D-fw) correlation analyses. Spartan calculations are presented which support the structural assignment. This structural characterization leads to an explanation of the behavior and the reactivity of these complexes in solution.
authors.affiliation: Department of Chemistry, Brown University, 324 Brook Street, Providence, Rhode Island 02912, USA.
authors.forename: Gerald
authors.initials: G
authors.lastname: Kagan
authors.forename: Weibin
authors.initials: W
authors.lastname: Li
authors.forename: Deyu
authors.initials: D
authors.lastname: Li
authors.forename: Russell
authors.initials: R
authors.lastname: Hopson
authors.forename: Paul G
authors.initials: PG
authors.lastname: Williard