EPR detection of Fe(V)=O active species in nonheme iron-catalyzed oxidations

Full Text
EPRdetection.pdf embargoed access
Request a copy
When filling the form you are requesting a copy of the article, that is deposited in the institutional repository (DUGiDocs), at the autor or main autor of the article. It will be the same author who decides to give a copy of the document to the person who requests it, if it considers it appropriate. In any case, the UdG Library doesn’t take part in this process because it is not authorized to provide restricted articles.
Very recently, in situ cryospray-assisted variable temperature mass spectrometry (VT-MS) has been used to obtain the first convincing evidence for a HO-Fe-V=O intermediate in the catalyst system [((Me2)PyTACN) Fe-II(OTf)(2)] (4)/H2O2 ((Me2)PyTACN = 1-(2'-pyridylmethyl)-4,7-dimethyl-1,4,7-triazacyclononane, OTf = OSO2CF3). The herein presented EPR spectroscopic study of the same system witnesses the formation of S = 1/2 reactive iron species. Its EPR parameters, in combination with its reactivity pattern toward cyclohexene and with independently obtained VT-MS data, allow for its reasonable assignment to the reactive [((Me2)PyTACN)Fe-V=O(OH)](2+) (4c) species ​
​Tots els drets reservats