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Des germylenes aux germynes : Synthèse et réactivité de ces analogues lourds des carbenes et des alcynes

Abstract : The metalla-alcynes of group 14-M=C -(M = Si, Ge, Sn) is a new function of organometallic chemistry, this function appears extremeley promising both in terms of fundamental applied. Indeed, if the study of a new link carbon presents a clear fundamental interest, these derivatives appear especially promising for their many potential applications : Organometallic precursor polymer, new ligands for transition metals chemistry, catalysis...
No germa-alcyne has been isolated to date and a single instance, short-lived, has been characterized with in our team by trapping reaction . Our strategy to prepare for such molecules involves the photochemical decomposition of a diazogermylene. In this work our effort focused more specifically on the search for substituents that could stabilize these species by electronic and steric effects. We used a new ligand (Ar = 2-diisopropylaminoethyl -4,6 - ditertbutylphenyl) which has the interest to add to the effect steric effect of a coordinated electronic intramolecular N>Ge. The photochemical decomposition led well then, after starting nitrogen at germa-alcyne Ar-Ge=C-SiMe3. This is the 2nd germa-alcyne known, it has been characterized by its reaction with water and tertiobutanol. The diazogermylène also offers an original and rich chemistry ; it is possible to achieve particularly germathione, germa-selenone and germa-tellurone > =Ge Y(Y = S, Se, Te) surprisingly stable condition and whose monomer there are few examples.
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Submitted on : Thursday, January 17, 2008 - 9:56:49 AM
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  • HAL Id : tel-00206319, version 1



E. Bonnefille. Des germylenes aux germynes : Synthèse et réactivité de ces analogues lourds des carbenes et des alcynes. Autre. Université Paul Sabatier - Toulouse III, 2007. Français. ⟨tel-00206319⟩



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