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Issue 1, 2016
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Isolation, structure and reactivity of a scandium boryl oxycarbene complex

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Abstract

The reaction of a half-sandwich scandium boryl complex 1 with CO (1 atm) afforded a novel boryl oxycarbene complex 2. The structure of 2 was characterized by 1H, 13C and 11B NMR, X-ray diffraction, and DFT analysis. Further reaction of 2 with CO (1 atm) yielded a phenylamido- and boryl-substituted enediolate complex 3 through C–C bond formation between CO and the carbene unit in 2 and cleavage and rearrangement of the Si–N bond in the silylene-linked Cp–amido ligand. Upon heating, insertion of the carbene atom into a methine C–H bond in the boryl ligand of 2 took place to give an alkoxide complex 4. The reactions of 2 with pyridine and 2-methylpyridine led to insertion of the carbene atom into an ortho-C–H bond of pyridine and into a methyl C–H bond of 2-methylpyridine, respectively. The reaction of 2 with ethylene yielded a borylcyclopropyloxy complex 7 through cycloaddition of the carbene atom to ethylene.

Graphical abstract: Isolation, structure and reactivity of a scandium boryl oxycarbene complex

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Publication details

The article was received on 24 Aug 2015, accepted on 16 Sep 2015 and first published on 16 Sep 2015


Article type: Edge Article
DOI: 10.1039/C5SC03138A
Citation: Chem. Sci., 2016,7, 803-809
  • Open access: Creative Commons BY license
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    Isolation, structure and reactivity of a scandium boryl oxycarbene complex

    B. Wang, X. Kang, M. Nishiura, Y. Luo and Z. Hou, Chem. Sci., 2016, 7, 803
    DOI: 10.1039/C5SC03138A

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