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Issue 13, 2014
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NHC-coordinated silagermenylidene functionalized in allylic position and its behaviour as a ligand

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Abstract

Vinylidenes are common in transition metal chemistry with catalytic applications in alkene and alkyne metathesis. We report here the isolation of a heavier analogue of vinylidene, an α-chlorosilyl functionalized silagermenylidene stabilized by an N-heterocyclic carbene (NHC). Silagermenylidene (Tip2Cl)Si-(Tip)Si[double bond, length as m-dash]Ge·NHCiPr2Me2 (4-E/Z; Tip = 2,4,6-iPr3C6H2; NHCiPr2Me2 = 1,3-diisopropyl-4,5-dimethylimidazol-2-ylidene) is available as an E/Z-equilibrium mixture from Tip2Si[double bond, length as m-dash]Si(Tip)Li and NHCiPr2Me2·GeCl2. Reaction of 4-E/Z with Fe2(CO)9 affords a silagermenylidene Fe(CO)4 complex, which slowly isomerizes to its E-isomer at 25 °C. A rearranged Fe(CO)3 complex with an allylic SiGeSi ligand is obtained as a side product at 65 °C.

Graphical abstract: NHC-coordinated silagermenylidene functionalized in allylic position and its behaviour as a ligand

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Publication details

The article was received on 10 Jan 2014, accepted on 14 Jan 2014 and first published on 15 Jan 2014


Article type: Paper
DOI: 10.1039/C4DT00094C
Citation: Dalton Trans., 2014,43, 5175-5181
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    NHC-coordinated silagermenylidene functionalized in allylic position and its behaviour as a ligand

    A. Jana, M. Majumdar, V. Huch, M. Zimmer and D. Scheschkewitz, Dalton Trans., 2014, 43, 5175
    DOI: 10.1039/C4DT00094C

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