Tetrel Bonding of the Carbenium Ion Forms a Pentacoordinate Carbon Atom
Steve Scheiner
Abstract:As a flat trigonal species, the CR3+ carbenium ion contains a pair of deep π‐holes above and below its molecular plane. In the case of CH3+ a first base will form a covalent bond with the central C, making the combined species tetrahedral. Approach of a second base to the opposite side results in a longer but rather strong noncovalent tetrel bond (TB). While the CMe3+ can also form a similar asymmetric complex with a pair of bases, it also has the capacity to form a pair of nearly equivalent TBs, such that the… Show more
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