A Boron-Boron Triple Bond

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Science  15 Jun 2012:
Vol. 336, Issue 6087, pp. 1394-1395
DOI: 10.1126/science.1224003

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Although carbon readily forms double and even triple bonds, such bonds are much rarer between the heavier elements of the same group or between atoms of other main groups of the periodic system. Chemists have succeeded in creating some such molecules, such as double-bonded silicon compounds, although they are usually highly reactive. On page 1420 of this issue, Braunschweig et al. (1) report the synthesis of one such highly unusual chemical compound, which has a boron-boron triple bond.