@article{307,
  keywords = {2 benzoquinone, 2-benzoquinone, 3, 5 di tert butylcatechol, 3, 5-di-tert-butylcatechol, Article, benzoquinone derivative, Benzoquinones, biomimetics, catalysis, catechol derivative, Catechols, chemical structure, chemistry, Crystallography, X-Ray, Kinetics, ligand, Ligands, Manganese, Models, Molecular, Molecular Structure, organometallic compound, Organometallic Compounds, oxidation reduction reaction, Oxidation-Reduction, oxygen, synthesis, X ray crystallography},
  author = {Imola Szigyártó and L.I. Simándi and L. Párkányi and L. Korecz and G. Schlosser},
  title = {Biomimetic oxidation of 3,5-di-tert-butylcatechol by dioxygen via Mn-enhanced base catalysis},
  abstract = {The 6-coordinate dioximatomanganese(II) complex [Mn(HL)(CH 3OH)]+ (2, where H2L is [HON=C(CH 3)C(CH3)=NCH2-CH2]2NH), formed by instant solvolysis of [Mn2(HL)2](BPh 4)2 (1) in methanol, accelerates the triethylamine (TEA)-catalyzed oxidation of 3,5-di-tert-butylcatechol (H2dtbc) by O2 to the corresponding o-benzoquinone. Significantly, 2 alone has no catalytic effect. The observed rate increase can be explained by the interaction of 2 with the hydroperoxo intermediate HdtbcO2 - formed from Hdtbc- and O2 in the TEA-catalyzed oxidation. The kinetics of the TEA-catalyzed and Mn-enhanced reaction has been studied by gas-volumetric monitoring of the amount of O 2 consumed. The initial rate of O2 uptake (Vin) shows a first-order dependence on the concentration of 2 and O2 and saturation kinetics with respect to both H2dtbc and TEA. The observed kinetic behavior is consistent with parallel TEA-catalyzed and Mn-enhanced oxidation paths. The 3,5-di-tert-butylsemiquinone anion radical is an intermediate detectable by electron spin resonance (ESR) spectroscopy. The dimeric catalyst precursor has been characterized by X-ray diffraction and electrospray ionization mass spectrometry and the monomeric catalyst by ESR spectroscopy. © 2006 American Chemical Society.},
  year = {2006},
  journal = {Inorganic Chemistry},
  volume = {45},
  pages = {7480-7487},
  month = {2006},
  isbn = {00201669 (ISSN)},
  url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-33748795791&partnerID=40&md5=24f7a471eda9069346ce2197479dcfed},
  note = {Cited By :16Export Date: 8 April 2016CODEN: INOCACorrespondence Address: Szigyártó, I.Cs.; Chemical Research Center, Institute of Surface Science and Catalysis, Hungarian Academy of Sciences, H-1525 Budapest, Hungary; email: imcsi@chemres.huChemicals/CAS: manganese, 16397-91-4, 7439-96-5; oxygen, 7782-44-7; 2-benzoquinone, 583-63-1; 3,5-di-tert-butylcatechol, 1020-31-1; Benzoquinones; Catechols; Ligands; Manganese, 7439-96-5; Organometallic Compounds; Oxygen, 7782-44-7References: Sigel, A., Sigel, H., Manganese and Its Role in Biological Processes (2000) Metal Ions in Biological Systems, 37. , Marcel Dekker: New York;Whittaker, J.H., , pp. 587-611. , Reference 1; Chapter 18Yoder, D.W., Hwang, J., Penner-Hahn, J.E., , pp. 527-557. , Reference 1; Chapter 16Gold, M.H., Youngs, H.L., Sollewijn Gelpke, M.D., , pp. 559-586. , Reference 1; Chapter 17Que Jr., L., Reynolds, M.F., , pp. 505-525. , Reference 1; Chapter 15Hoganson, C.W., Babcock, G.T., , pp. 613-656. , Reference 1; Chapter 19Ferreira, K.N., Iverson, T.M., Maghlaoui, K., Barber, J., Iwata, S., (2004) Science, 303, pp. 1831-1838; Pecoraro, V.L., Hsieh, W.-Y., , pp. 429-504. , Reference 1; Chapter 14Pecoraro, V.L., Baldwin, M.J., Gelasco, A., (1994) Chem. 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}