Plumbanorbornyl cation

The related intramolecular monoalkene complexes of R3E + cations, the nor-bornyl cations of group 14 elements (Si —> Pb), have been synthesized with TPFPB as counteranion and characterized by NMR spectroscopy in solution supported by quantum mechanical calculations.40 Only the acetonitrile complex, 73, of the plumbanorbornyl cation 13 could be characterized by X-ray crystallography. Similar to the structure of the plumbyl cation 74, the Pb atom in the acetonitrile complex 73 adopts a trigonal-bipyramidal coordination sphere with the C = C double bond and the acetonitrile in the apical positions and the Pb atom in the center of the trigonal plane (see Fig. 11 and Table XIV, for details).40... 

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