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Abstract— <p>The reaction of potassium salt of 7,9-dicarba-<i>nido</i>-undecaborate anion K[7,9-C<sub>2</sub>B<sub>9</sub>H<sub>12</sub>] (<i>meta</i>-<i>nido</i>-carborane) with mercury(II) chloride was studied under various conditions. It was shown that, in contrast to the 7,8-dicarba-<i>nido</i>-undecaborate anion, the reaction in a mixture of benzene and acetonitrile proceeds non-selectively and leads to a complex mixture of products, from which, after column chromatography on silica gel, a derivative with a condensed diboroxazole ring 2,11-(μ-OC(Me)=NH–O,N)-7,9-<i>nido</i>-C<sub>2</sub>B<sub>9</sub>H<sub>10</sub> (the main product) and 6,8-dicarba-<i>arachno</i>-nonaborane were isolated. The using of excess of HgCl<sub>2</sub> allows one to avoid the formation of 6,8-<i>arachno</i>-C<sub>2</sub>B<sub>7</sub>H<sub>13</sub>, but leads to the formation of a difficult-to-separate impurity of the chloro derivative 4-Cl-2,11-(μ-OC(Me)=NH–O,N)-7,9-<i>nido</i>-C<sub>2</sub>B<sub>9</sub>H<sub>9</sub>. It was shown that 6,8-dicarba-<i>arachno</i>-nonaborane (6,8-<i>arachno</i>-C<sub>2</sub>B<sub>7</sub>H<sub>13</sub>) can be selectively obtained by the reaction of K[7,9-C<sub>2</sub>B<sub>9</sub>H<sub>12</sub>] with HgCl<sub>2</sub> in hydrochloric acid.</p>

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Reaction of 7,9-Dicarba-nido-Undecaborate Anion with Mercury(II) Chloride

  • 期刊论文

  • 发表日期：

    2026年1月1日

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  • E. V. Bogdanova,
  • K. Yu. Suponitsky,
  • S. A. Anufriev,
  • M. Yu. Stogniy,
  • I. B. Sivaev

摘要

Abstract—

The reaction of potassium salt of 7,9-dicarba-nido-undecaborate anion K[7,9-C2B9H12] (meta-nido-carborane) with mercury(II) chloride was studied under various conditions. It was shown that, in contrast to the 7,8-dicarba-nido-undecaborate anion, the reaction in a mixture of benzene and acetonitrile proceeds non-selectively and leads to a complex mixture of products, from which, after column chromatography on silica gel, a derivative with a condensed diboroxazole ring 2,11-(μ-OC(Me)=NH–O,N)-7,9-nido-C2B9H10 (the main product) and 6,8-dicarba-arachno-nonaborane were isolated. The using of excess of HgCl2 allows one to avoid the formation of 6,8-arachno-C2B7H13, but leads to the formation of a difficult-to-separate impurity of the chloro derivative 4-Cl-2,11-(μ-OC(Me)=NH–O,N)-7,9-nido-C2B9H9. It was shown that 6,8-dicarba-arachno-nonaborane (6,8-arachno-C2B7H13) can be selectively obtained by the reaction of K[7,9-C2B9H12] with HgCl2 in hydrochloric acid.