An unprecedented alpha-C-C agostic interaction in a cyclopropyl tris(pyrazolyl)boratoniobium complex.

@article{Jaffart2003AnUA,
  title={An unprecedented alpha-C-C agostic interaction in a cyclopropyl tris(pyrazolyl)boratoniobium complex.},
  author={Jo{\"e}lle Jaffart and Michel Etienne and Meike Reinhold and John E McGrady and Feliu Maseras},
  journal={Chemical communications},
  year={2003},
  volume={7},
  pages={876-7}
}
Structural, spectroscopic and theoretical evidence indicate that an unusual alpha-C-C agostic interaction is preferred over both alpha- and beta-C-H agostic alternatives in the title compound, TpMe2NbCl(c-C3H5)(MeCCMe).