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<p>Among the first-row <i>p</i>-block elements that can conceivably form neutral triple-bonded species (boron, carbon, nitrogen and oxygen), all combinations have been realized except that between boron and carbon. This deficiency is especially glaring as stable molecules containing C≡C and B≡B triple bonds (in alkynes and diborynes, respectively), as well as those with C=B double bonds, are well established. Here we describe the synthesis and isolation of a boryne, in its neutral and uncoordinated form, closing the remaining gap in the family of neutral first-row <i>p</i>-block compounds with triple bonds. The B≡C triple bond is confirmed by experimental and computational methods, as well as a series of further reactions notably including its π-coordination to a copper(I) fragment.</p><p></p>

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The synthesis of a neutral boryne

  • 期刊论文

  • 发表日期：

    2025年3月4日

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  • Maximilian Michel,
  • Sourav Kar,
  • Lukas Endres,
  • Rian D. Dewhurst,
  • Bernd Engels,
  • Holger Braunschweig

摘要

Among the first-row p-block elements that can conceivably form neutral triple-bonded species (boron, carbon, nitrogen and oxygen), all combinations have been realized except that between boron and carbon. This deficiency is especially glaring as stable molecules containing C≡C and B≡B triple bonds (in alkynes and diborynes, respectively), as well as those with C=B double bonds, are well established. Here we describe the synthesis and isolation of a boryne, in its neutral and uncoordinated form, closing the remaining gap in the family of neutral first-row p-block compounds with triple bonds. The B≡C triple bond is confirmed by experimental and computational methods, as well as a series of further reactions notably including its π-coordination to a copper(I) fragment.