NDLI: Synthesis, structure and reactivity of a donor-stabilised silylene with a bulky bidentate benzamidinato ligand

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Bertermann, Rüdiger Kobelt, Claudia Baus, Johannes A. Burschka, Christian Tacke, Reinhold
Description	Author Affiliation: Tacke R ( Universität Würzburg, Institut für Anorganische Chemie, Am Hubland, D-97074 Würzburg, Germany. r.tacke@uni-wuerzburg.de.)
Abstract	The novel donor-stabilised silylene 5 was prepared in a four-step synthesis, starting from bis(2,6-diisopropylphenyl)carbodiimide (Dipp–N=C=N–Dipp), and its reactivity was studied in a series of oxidative addition reactions and a nucleophilic substitution reaction. The three-coordinate silicon(II) complex 5 contains the bulky bidentate amidinato ligand $Dipp–NC(Ph)N–Dipp^{−}$ and a dimethylamido ligand. Treatment of 5 with $N_{2}O$ afforded the dinuclear five-coordinate silicon(IV) complex 6 $(SiO_{2}N_{3}$ skeletons), and the reaction with $S_{8}$ yielded the dinuclear four-coordinate silicon(IV) complex 7 $(SiS_{2}N_{2}$ skeletons). Treatment of 5 with Se and Te afforded the respective four-coordinate silicon(IV) complexes 8 $(SiSeN_{3}$ skeleton) and 9 $(SiTeN_{3}$ skeleton), which contain an Si=Se and Si=Te double bond, respectively. The reaction of 5 with the silyl azide $Me_{3}SiN_{3}$ yielded the four-coordinate silicon(IV) complex 10 $(SiN_{4}$ skeleton) with an Si=N double bond, whereas the reaction with the alkyl azide $PhSCH_{2}N_{3}$ gave the four-coordinate silicon(IV) complex 11 $(SiSN_{3}$ skeleton), the first silicon(IV) complex with an unsubstituted methyleneamido ligand. The reaction of 5 with $[Fe(CO)_{5}]$ afforded the four-coordinate silicon(II) complex 12 $(SiFeN_{3}$ skeleton) with an Si–Fe bond. Compounds 5–12 (and the precursors 14 and 15 (five-coordinate silicon(IV) complexes with an $SiCl_{3}N_{2}$ and $SiCl_{2}N_{3}$ skeleton, respectively) in the synthesis of 5) were characterised by elemental analyses, crystal structure analyses and multinuclear NMR spectroscopic studies in the solid state and in solution.
ISSN	14779226
Issue Number	33
Journal	Dalton Trans.
Volume Number	44
e-ISSN	13645447
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2015-09-07
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Chemistry
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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