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- W610539917 abstract "A number of trans-dihydroxo porphyrinato platinum(IV) complexes, [(porp)PtIV(OH)2] have been synthesized and characterized from their platinum(II)-porphyrin precursors by spectroscopic methods. The crystal structure of the platinum complex of trans-dihydroxo-meso-tetramesitylporphyrinato platinum(IV) meta-chlorobenzoic acid ([(TMP)PtIV(OH)2](m-CBA)2) has also been determined. The porphyrin periphery is planar and the platinum atom has a slightly distorted octahedral environment. It must be noted that there is a very strong O–H⋯O hydrogen bond between the hydrogen atoms of m-chlorobenzoic acids and the two hydroxo ligands coordinated to the platinum center. This crystal structure has been previously described by us as trans-dihydroxo-meso-tetramesitylporphyrinato platinum(VI) meta-chlorobenzoate ([(TMP)PtVI(OH)2](m-CB)2), but the spectroscopic data has been reinterpreted due to the contradictory +6 oxidation state for platinum. The UV–Vis and NMR spectroscopic data suggest that the porphyrin skeleton is similar to that of normal porphyrins and are also indicative of the +4 oxidation state for platinum. Cyclic voltammetry studies also indicate that PtIITMP can oxidize up to PtIV(TMP+) species via three successive one-electron oxidation steps. The results of DFT studies and NBO analysis confirm that platinum has +4 oxidation state in both [(TMP)Pt(OH)2](m-CBA)2 and [(TMP)Pt(OH)2](m-CB)2 complexes. The catalytic activity of these porphyrin complexes has been investigated for the oxidation of various alkenes in the presence of iodosylbenzene." @default.
- W610539917 created "2016-06-24" @default.
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- W610539917 date "2015-08-01" @default.
- W610539917 modified "2023-09-25" @default.
- W610539917 title "Hydrogen bond controlled formation of trans-dihydroxo porphyrinato platinum(IV) complexes: Synthesis, characterization and catalytic activity in olefin epoxidation" @default.
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- W610539917 doi "https://doi.org/10.1016/j.ica.2015.05.023" @default.
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