B19: An Aromatic Wankel Motor


  • Financial support from the Air Force Research Laboratory Latin American Initiative Project and DAIP-UGTO are acknowledged. R.I. thanks CONACYT for a Ph.D. fellowship. We also thank to Prof. Miquel Solà and Prof. Miguel A. García-Garibay for their useful comments and discussions.


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The magic roundabout: The B19 cluster behaves like a molecular Wankel engine (see picture) in which the two concentric boron rings rotate in opposite directions. During the rotation the cluster remains planar owing to a marginal rotational energy barrier.