Abstract
Two iron(III) tetraphenyl porphyrin catalytic units are connected by an azo-link to form the dimeric compound A. The compound A was then reacted with Pd 2+ to make a tetrameric iron(III) porphyrin complex B with all four iron(III) catalytic sites open to the substrates and reactants. Both the compounds were characterized spectroscopically and the results of homogeneous oxidation of some alkanes and alkenes with t-BuOOH in presence of catalytic quantities of A and B have indicated remarkable improvement in selectivity and efficiency of A over the monomeric catalyst and B over A.
New tetrameric soluble iron(III) porphyrins and their remarkable catalytic oxidation of several alkenes to alkene oxides by t-BuOOH are explored.
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The monomer (C 44 H 27 N 2 O 2FeCl = 748.45) is supposed to give the parent ion peak at ∼748 but we are getting it at ∼713 which is the parent ion peak – one chloride ion (figure S3). The monomeric porphyrin (figure S4, C 44 H 29 N 5 O 2 [M] ∼659) gives the major peak at [M + H] += 660.2370 as expected
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Acknowledgements
We thank the Department of Science and Technology (DST, India) (Project no. SR/S1/IC-48/2010) for funding and UGC for the fellowship to MKS.
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Supplementary Information
Electronic spectra, ESI-Mass, Maldi TOF spectra and stability of the catalysts under oxidizing condition (table S1) are given in supporting information. Supplementary Information is available at www.ias.ac.in/chemsci.
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SINGH, M.K., BANDYOPADHYAY, D. A new Organopalladium compound containing four Iron (III) Porphyrins for the selective oxidation of alkanes/alkenes by t-BuOOH. J Chem Sci 128, 383–389 (2016). https://doi.org/10.1007/s12039-016-1032-1
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DOI: https://doi.org/10.1007/s12039-016-1032-1