Can alkali-metal ions influence the coordination and reactivity of calix[4]arenes at transition-metal centres?

Abstract

Novel chromium and molybdenum calix[4]arene complexes are described in which the calixarene coordination is constrained by alkali-metal ion interactions with the phenoxide units; in the chromium example, an unprecedented calixarene C–H bond activation is found.

References

1. L. Giannini, E. Solari, A. Zanotti-Gerosa, C. Floriani, A. Chiesi-Villa and C. Rizzoli, Angew. Chem., Int. Ed. Engl., 1996, 35, 2825; B. Castellano, A. Zanotti-Gerosa, E. Solari and C. Floriani, Angew. Chem., Int. Ed. Engl., 1996, 15, 4894.
2. A. Zanotti-Gerosa, E. Solari, L. Giannini, C. Floriani, A. Chiesi-Villa and C. Rizoli, Chem. Commun., 1997, 183.
3. J. A. Acho, L. H. Doerrer and S. J. Lippard, Inorg. Chem., 1995, 34, 2542.
4. V. C. Gibson, C. Redshaw, W. Clegg and M. R. J. Elsegood, J. Chem. Soc., Chem. Commun., 1995, 2371.
5. J. A. Acho and S. J. Lippard, Inorg. Chim. Acta, 1995, 229, 5.
6. A. Zanotti-Gerosa, E. Solari, L. Giannini, C. Floriani, A. Chiesi-Villa and C. Rizzoli, Chem. Commun., 1996, 119.
7. F. Corazza, C. Florianni, A. Chiesi-Villa and C. Guastini, J. Chem. Soc., Chem. Commun., 1990, 640.
8. F. Corazza, C. Florianni, A. Chiesi-Villa and C. Rizzoli, Inorg. Chem., 1991, 30, 4465.
9. F. Corazza, C. Floriani, A. Chiesi-Villa and C. Guastini, J. Chem. Soc., Chem. Commun., 1990, 1083.
10. J. L. Atwood, M. G. Gardiner, C. Jones, C. L. Raston, B. W. Skelton and A. H. White, Chem. Commun., 1996, 2487.
11. M. G. Gardiner, S. M. Lawrence, C. L. Raston, B. W. Skelton and A. H. White, Chem. Commun., 1996, 2491.
12. W. A. Nugent and J. M. Mayer, Metal–Ligand Multiple Bonds, Wiley Interscience, New York, 1988.