Inorganic Chemistry

Taking another look at a BB triple bond

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Science  06 Feb 2015:
Vol. 347, Issue 6222, pp. 624-625
DOI: 10.1126/science.347.6222.624-e

Carbon and boron are neighbors in the periodic table, and that proximity entices chemists to make them emulate one another, akin to dressing siblings in matching outfits. An exciting achievement in this area was the preparation of a compound with a BB triple bond, analogous to the CC bond in an alkyne. Köppe and Schnöckel now have analyzed this compound in a thermodynamic context that highlights the substantial stabilizing influence of the capping groups (N-heterocyclic carbenes) on each B atom. They further considered the stiffness of the BB bond reflected in vibrational analyses. On this basis, they suggest that the compound might be better considered to have a lower-order BB bond, with higher-order bonds to the capping groups.

Chem. Sci. 10.1039/c4sc02997f (2014).

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