Decisive Influence of Phosphorus Ligands on O2 Oxidations of Alkenes in the Presence of the Iron Nitrato/Iron Nitrosyl Couple |
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| Authors: | Michèle Postel Félix Tomi Henri Li Kam Wah Laurence Mordenti Patricia Guillaume |
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| Institution: | Laboratoire de Chimie Moléculaire Unité Associée au C.N.R.S. n 426, Université de Nice , 06034, Nice, France |
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| Abstract: | Abstract Fe(NO)2XL and Fe(NO)X2L nitrosyl iron complexes, X = Cl, I, and L = HMPA, dppe, PPh3, activate molecular O2 to yield nitrato complexes. The phosphorous ligand is decisive for the oxidative power of these nitrates: with HMPA or dppe, oxygen transfer occurs only to phosphines. On going from HMPA to PPh3 the single nitrato complex obtained, Fe(NO)2X(OPPh3)2 selectively epoxidizes cyclohexene, and this is the first example of oxygen transfer from a nitrato ligand to an olefin. |
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