The B19- anion and other boron species have been dubbed ‘Wankel motors’ for the almost barrierless rotation of inner and outer concentric rings relative to each other in these compounds. A single substitution in B19- is shown to shut down the well-established fluxionality in the anion. A carbon atom substituted in the structure to give a neutral CB18 species is shown computationally to enforce bond localization.
Please note that downloads of the article are for private/personal use only.
Cervantes-Navarro, Francisco, Gerardo MartÍnez-Guajardo, Edison Osorio, Diego Moreno, William Tiznado, Rafael Islas, Kelling J. Donald, and Gabriel Merino. "Stop Rotating! One Substitution Halts the B19- Motor." Chemical Communications 50 (2013): 10680-10682. doi:10.1039/c4cc03698k.