Jump to main content
Jump to site search

Issue 29, 2009
Previous Article Next Article

Syntheses, structures, and reactivity of poly(pyrazolyl)silanes, -disilanes, and the ambidentate κ1Si3N-coordinating tris(3,5-dimethylpyrazolyl)silanide ligand [Si(3,5-Me2pz)3] (MeTpsd)

Author affiliations

Abstract

The reaction conditions for the synthesis [Si2(Mepz)6] (1) and [Si(Mepz)4] (4) have been investigated in detail in order to obtain suitable precursor compounds for the synthesis of the hitherto unknown Janus-head ligand tris(3,5-dimethylpyrazolyl)silanide ([Si(Mepz)3], MeTpsd). Within the monomeric lithium salt [Li(thf)(MeTpsd)] (5), the ambidentate silanide ligand is bound in a κ3N-fashion to the Li cation, featuring an uncoordinated, anionic silicon bridgehead. Treatment of the silanide with various electrophiles such as Me3SiCl, Me3SnCl and Ph3SnCl gave in each case the expected salt metathesis reaction with the formation of Si–Si and Si–Sn bonds, respectively. The products [Me3Si–Si(Mepz)3] (6) and [Me3Sn–Si(Mepz)3] (7) and [Ph3Sn–Si(Mepz)3] (8) are the first backbone-funtionalized derivatives originating from the tris(pyrazolyl)silanide. Overall, it could be concluded that the anionic ligand backbone of MeTpsd is much more accessible for electrophiles compared to the carbon analogue ([C(Mepz)3], MeTpmd).

Graphical abstract: Syntheses, structures, and reactivity of poly(pyrazolyl)silanes, -disilanes, and the ambidentate κ1Si/κ3N-coordinating tris(3,5-dimethylpyrazolyl)silanide ligand [Si(3,5-Me2pz)3]− (MeTpsd)

Back to tab navigation

Supplementary files

Publication details

The article was received on 31 Mar 2009, accepted on 21 May 2009 and first published on 24 Jun 2009


Article type: Paper
DOI: 10.1039/B906333A
Citation: Dalton Trans., 2009,0, 5612-5626

  •   Request permissions

    Syntheses, structures, and reactivity of poly(pyrazolyl)silanes, -disilanes, and the ambidentate κ1Si3N-coordinating tris(3,5-dimethylpyrazolyl)silanide ligand [Si(3,5-Me2pz)3] (MeTpsd)

    F. Armbruster, I. Fernández and F. Breher, Dalton Trans., 2009, 0, 5612
    DOI: 10.1039/B906333A

Search articles by author

Spotlight

Advertisements