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• W2887661665 abstract "Abstract Reaction of N ‐acetylpyrazine‐2‐carbohydrazide (H 2 L) with anhydrous Fe(II) or Fe(III) chloride in CH 3 CN or in MeOH leads to the mononuclear [Fe( κ NN'O‐HL)Cl 2 ] ( 1 ) or binuclear [Fe( κ NN'O‐HL)Cl( μ ‐OMe)] 2 ( 2 ) Fe(III) complex, respectively. These complexes are characterized by elemental analysis, ESI‐MS, IR spectroscopy, single‐crystal X‐ray crystallography, electrochemical techniques and DFT calculations. The theoretical calculations indicate that the three single‐electron sequential reductions of 1 are centred at the metal, at the pyrazine group and at both, respectively. The catalytic activity of 1 and 2 was screened towards Friedel‐Crafts benzoylation and acylation of m ‐xylene. The effects of reaction parameters, such as catalyst amount, reaction time and temperature, were studied and, under optimal conditions, 96% yield of 2,4‐dimethylbenzophenone and 20% yield of 2,4‐dimethylacetophenone were obtained, respectively. Complex 1 exhibited the highest activity in both reactions. The structural and electrochemical properties were supported by theoretical calculations and the importance of the Lewis acid character of the catalyst in the promotion of this catalytic reaction is discussed." @default.
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• W2887661665 date "2018-07-30" @default.
• W2887661665 modified "2023-09-26" @default.
• W2887661665 title "Efficient Solvent-Free Friedel-Crafts Benzoylation and Acylation of m -Xylene Catalyzed by N -Acetylpyrazine-2-carbohydrazide-Fe(III)-chloro Complexes" @default.
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• W2887661665 doi "https://doi.org/10.1002/slct.201801656" @default.
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