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      Ambient-temperature isolation of a compound with a boron-boron triple bond.

      Science (New York, N.Y.)

      American Association for the Advancement of Science (AAAS)

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          Abstract

          Homoatomic triple bonds between main-group elements have been restricted to alkynes, dinitrogen, and a handful of reactive compounds featuring trans-bent heavier elements of groups 13 and 14. Previous attempts to prepare a compound with a boron-boron triple bond that is stable at ambient temperature have been unsuccessful, despite numerous computational studies predicting their viability. We found that reduction of a bis(N-heterocyclic carbene)-stabilized tetrabromodiborane with either two or four equivalents of sodium naphthalenide, a one-electron reducing agent, yields isolable diborene and diboryne compounds. Crystallographic and spectroscopic characterization confirm that the latter is a halide-free linear system containing a boron-boron triple bond.

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          Most cited references 26

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                Author and article information

                Journal
                22700924
                10.1126/science.1221138

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