Synthesis and structure of halogen derivatives of 9-dimethylsulfonium-7,8-dicarba-nido-undecaborane [9-Me2S-7,8-C2B9H11] |
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| Authors: | Sergey V Timofeev Elena A Rakova Zoya A Starikova Ivan A Godovikov Vladimir I Potkin Igor B Sivaev Vladimir I Bregadze |
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| Institution: | a A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Street 28, 119991, Moscow, Russian Federation
b Institute of Physical Organic Chemistry, National Academy of Sciences of Belarus, Surganov Street 13, 220072, Minsk, Belarus |
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| Abstract: | Halogenation of 9-dimethylsulfonium-7,8-dicarba-nido-undecaborane 9-SMe2-7,8-C2B9H11] with N-chlorosuccinimide, bromine and iodine gave the expected corresponding halogen derivatives 9-SMe2-11-X-7,8-C2B9H10], where X = Cl (1), Br (2), I (3). In the bromination reaction, 9-SMe2-6-Br-7,8-C2B9H10] (4) was isolated as a minor product being the first example of substitution at a “lower” belt of the 7,8-dicarba-nido-undecaborate cage. The use of excess of bromine resulted in dibromo derivative 9-SMe2-6,11-Br2-7,8-C2B9H9] (5). Structures of the compounds prepared were determined using 11B-11B COSY NMR spectroscopy (for all halogen derivatives) and single crystal X-ray diffraction (for compounds 2, 3, and 5). |
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| Keywords: | 9-Dimethylsulfonium-7 8-dicarba-nido-undecaborane Chlorination Bromination Iodination X-ray structure 11B-11B COSY NMR spectroscopy |
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