Influence of a pendant amine in the second coordination sphere on proton transfer at a dissymmetrically disubstituted diiron system related to the [2Fe]H subsite of [FeFe]H2ase.
Studies of the protonation of [Fe2(CO)4(kappa2-PNP)(mu-pdt)] (1; PNP = (Ph2PCH2)2NCH3) by HBF4.Et2O showed that the nature of the reaction product depends on whether the reaction is conducted in acetone or in dichloromethane. In acetone, an N-protonated form, 2, is isolated. Tautomerization of 2 in CH2Cl2 gives rise to a mu-hydride species 3. Variable-temperature NMR experiments have been performed to clarify the processes involved.
Ezzaher
Salah
S
Université Européenne de Bretagne, 35000 Rennes, France.
Capon
Jean-François
JF
Gloaguen
Frédéric
F
Pétillon
François Y
FY
Schollhammer
Philippe
P
Talarmin
Jean
J
D000588:Amines / Q000737:chemistry*; D004563:Electrochemistry; D006864:Hydrogenase / Q000737:chemistry* / Q000378:metabolism; D007501:Iron / Q000737:chemistry*; D007506:Iron-Sulfur Proteins / Q000737:chemistry* / Q000378:metabolism; D011522:Protons
D000588:Amines; D007506:Iron-Sulfur Proteins; D011522:Protons; D007501:Iron; C118830:iron hydrogenase; D006864:Hydrogenase