title: Diketiminate silicon(II) and related NHSi ligands generated in the coordination sphere of nickel(0).
abstract: The first silicon(II) hydroxide and related electronically tunable NHSi ligands have been synthesized in the coordination sphere of a [Ni(CO)(3)] moiety through facile addition of water and other electrophiles to the corresponding NHSi-tricarbonylnickel complex. The latter modified silicon (II) ligands are unique and exhibit striking donor/acceptor capabilities depending on their substitution pattern. While strong Lewis acids [H(+) or B(C(6)F(5))(3)] lead to modified silicon(II) ligands in the coordination sphere of nickel with an increased pi-acceptor and decreased sigma-donor character (PF(3)-like), by contrast, addition of water or trifluoromethanesulfonic acid furnishes the corresponding donor-stabilized silicon(II)-nickel complexes with a inverse donor/acceptor strength similar to those of triorganophosphines and NHCs.
authors.affiliation: Institute of Chemistry, Metalorganics and Inorganic Materials, Technische Universitat Berlin, Strasse des 17. Juni 135, Sekr. C2, D-10623 Berlin, Germany.
authors.forename: Antje
authors.initials: A
authors.lastname: Meltzer
authors.forename: Carsten
authors.initials: C
authors.lastname: Präsang
authors.forename: Matthias
authors.initials: M
authors.lastname: Driess