title: Reactions of the donor-stabilized silylene bis[N,N'-diisopropyl-benzamidinato(-)]silicon(II) with Brønsted acids.
abstract: Reaction of the donor-stabilized silylene 1 (which is three-coordinate in the solid state and four-coordinate in solution) with [HMCp(CO)3 ] (M=Mo, W; Cp=cyclopentadienyl) leads to the cationic five-coordinate silicon(IV) complexes 2 and 3, respectively, and reaction of 1 with CH3 COOH yields the neutral six-coordinate silicon(IV) complex 4. Compounds 2-4 were structurally characterized by crystal structure analyses and multinuclear NMR spectroscopic studies in the solid state and in solution. The formation of 2-4 can be formally described in terms of a Brønsted acid/base reaction, coupled with a redox process (Si(II) →Si(IV) , H(+) →H(-) ).
authors.affiliation: Universität Würzburg, Institut für Anorganische Chemie, Am Hubland, 97074 Würzburg (Germany), Fax: (+49) 931-31-84609.
authors.forename: Konstantin
authors.initials: K
authors.lastname: Junold
authors.forename: Katharina
authors.initials: K
authors.lastname: Sinner
authors.forename: Johannes A
authors.initials: JA
authors.lastname: Baus
authors.forename: Christian
authors.initials: C
authors.lastname: Burschka
authors.forename: Célia
authors.initials: C
authors.lastname: Fonseca Guerra
authors.forename: F Matthias
authors.initials: FM
authors.lastname: Bickelhaupt
authors.forename: Reinhold
authors.initials: R
authors.lastname: Tacke
keywords: N ligands; cations; density functional calculations; silicon; transition metals