The Rhodium(I) silyl complex
trans-(PPh
3)
2(η
2- norbornene)RhSiMe
2Ph (
1) was generated via three routes. Treatment of RhY(PPh
3)
3 (Y = Cl, OAc) with at least two equiv. of PhMe
2SiH and norbornene (NBE) produced
1 and one equiv. of PhMe
2SiY and norbornane (NBA). Optimally, RhH(PPh
3)
3 with three equiv of PhMe
2SiH and NBE afforded 80%
1 plus one equiv of NBA; reactions with 10-20 equiv. each of PhMe
2SiH and NBE quantitatively generated
1. Finally, (η
3-cyclohexenyl)Rh(PPh
3)
2 plus at least one equiv of PhMe
2SiH and NBE yielded 1:1 cyclohexene and
1. The reactivity of
1 reflects the high lability of its NBE and subsequent trapping of the 14-electron Rh(SiMe
2Ph)(PPh
3)
2. Reactions of
1 with acetic acid, dihydrogen, and EtMe
2SiH or Me(MeO)
2SiH accordingly yield RhH(PPh
3)
3 plus PhMe
2SiOAc or PhMe
2SiH, or two new silyl complexes (PPh
3)
2(NBE)RhSiR
3 [SiR
3 = SiMe
2Et, Si(OMe)
2Me] plus PhMe
2SiH. Either a deficiency of NBE or evaporation of solutions containing
1 initiates its degradation to a 3:1 mixture of (PPh
3)
2Rh-(η
2-P,Si)-Si(MeR)C
6H
4PPh
2 (R = Me, Ph) through loss of benzene or methane, respectively. The same product mixture results from treating (PPh
3)
2Rh-(η
2-P,C)-C
6H
4PPh
2 with PhMe
2SiH. Results of recent studies on the reactivity of
1 towards styrene, fluorenone-acetophenone-acetone, and acetonitrile will be presented.