Planar pentacoordinate carbon in CAl5(+): a global minimum.
@article{Pei2008PlanarPC, title={Planar pentacoordinate carbon in CAl5(+): a global minimum.}, author={Y. Pei and W. An and Keigo Ito and P. Schleyer and X. Zeng}, journal={Journal of the American Chemical Society}, year={2008}, volume={130 31}, pages={ 10394-400 } }
We report evidence for the first global-minimum structure having a planar pentacoordinate carbon. High-level ab initio computations and quantum molecular dynamics simulations at 300 and 400 K reveal that the most stable CAl5(+) isomer has D5h symmetry and is approximately 3.80 kcal/mol lower in energy than the second most stable alternative. The latter has a nonplanar structure based on a tetrahedral CAl4 moiety. The unexpectedly high proclivity for two-dimensional chemical bonding of the… Expand
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