Synthesis and coordination chemistry of 1,3,5-triphosphabicyclo[2.1.0]- pent-2-ene

Abstract

Room temperature electrocyclisation of the 1,2,4-triphosphole P₃C₂Bu^t₂CH(SiMe₃)₂ affords the new 1,3,5-triphosphabicyclo[2.1.0]pent-2-ene which undergoes a very rapid [1,3]-phosphorus migration which can be stopped by coordination of [W(CO)₅]; the two isomeric phosphorus compounds react differently with [PtCl₂(PEt₃)]₂, the latter via an insertion of the metal into the P–P bond and a chlorine migration reaction to afford trans-[PtCl(PEt₃)P₂C₂- Bu^t₂PClCH(SiMe₃)₂], the molecular structure of which has been determined by a single crystal X-ray diffraction study.

References

1. S. M. Bachrach, V. Caliman and J. F. Nixon, J. Chem. Soc., Chem. Commun., 1995, 2395.
2. V. Caliman, P. B. Hitchcock and J. F. Nixon, J. Chem. Soc., Chem. Commun., 1995, 1661.
3. V. Caliman, P. B. Hitchcock, J. F. Nixon, L. Nyulaszi and N. Sakarya, Chem. Commun., 1997, 1305.
4. F. A. Ajulu, P. B. Hitchcock, J. F. Nixon, R. A. Michelin and A. J. L. Pombeiro, J. Chem. Soc., Chem. Commun., 1993, 142.
5. R. Appel, C. Casser, M. Immenkeppel and F. Knoch, Angew. Chem., Int. Ed. Engl., 1984, 23, 895.
6. D. Gudat, E. Niecke, A. M. Arif, A. H. Cowley and S. Quashie, Organometallics, 1986, 5, 593.
7. V. Caliman, P. B. Hitchcock and J. F. Nixon, Heteroatom. Chem., 1998, 9, 1.