title: The role of ligand displacement in SmII-HMPA-based reductions.
abstract: Addition of HMPA to [Sm[N(SiMe(3))(2)](2)] produces a less reactive reductant in contrast to addition of HMPA to SmI(2). While the [Sm[N(SiMe(3))(2)](2)]-HMPA combination results in a more powerful reductant based on the redox potential, the observed decrease in reactivity is attributed to steric hindrance caused by the nonlabile ligand -N(SiMe(3))(2) and HMPA around the Sm metal. The importance of ligand displacement (exchange) in Sm(II)-HMPA-based reactions and insight into the mechanism of [Sm[N(SiMe(3))(2)](2)]-HMPA and SmI(2)-HMPA reductions are presented.
authors.affiliation: Department of Chemistry, Lehigh University, Bethlehem, Pennsylvania 18015, USA.
authors.forename: Edamana
authors.initials: E
authors.lastname: Prasad
authors.forename: Brian W
authors.initials: BW
authors.lastname: Knettle
authors.forename: Robert A
authors.initials: RA
authors.lastname: Flowers