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• W2966537440 abstract "Liquid phase catalytic oxidation of a number of alkenes, for example, cyclohexene, cis ‐cyclooctene, styrene, 1‐methyl cyclohexene and 1‐hexene, was performed using polymer‐anchored copper (II) complexes PS‐[Cu (sal‐sch)Cl] ( 5 ), PS‐[Cu (sal‐tch)Cl] ( 6 ), PS‐[CH 2 {Cu (sal‐sch)Cl} 2 ] ( 7 ) and PS‐[CH 2 {Cu (sal‐tch)Cl} 2 ] ( 8 ). Neat complexes [Cu (sal‐sch)Cl] ( 1 ), [Cu (sal‐tch)Cl] ( 2 ), [CH 2 {Cu (sal‐sch)Cl} 2 ] ( 3 ) and [CH 2 {Cu (sal‐tch)Cl} 2 ] ( 4 ) were isolated by reacting CuCl 2 ·2H 2 O with [Hsal‐sch] ( I ), [Hsal‐tch] ( II ), [H 2 bissal‐sch] ( III ) and [H 2 bissal‐tch] ( IV ), respectively, in refluxing methanol. Complexes 1–4 have been covalently anchored in Merrifield resin through the amine nitrogen of the semicarbazide or thiosemicarbazide moiety. A number of analytical, spectroscopic and thermal techniques, such as CHNS analysis, Fourier transform‐infrared, UV–Vis, PMR, 13 C‐NMR, electron paramagnetic resonance, scanning electron microscopy, energy‐dispersive X‐ray analysis, thermogravimetric analysis, atomic force microscopy, atomic absorption spectroscopy, and electrospray ionization‐mass spectrometry, were used to analyze and establish the molecular structure of the ligands ( I )–( IV ) and complexes ( 1 )–( 8 ) in solid state as well as in solution state. Grafted complexes 5 – 8 were employed as active catalysts for the oxidation of a series of alkenes in the presence of hydrogen peroxide. Copper hydroperoxo species ([Cu III (sal‐sch)‐O‐O‐H]), which is believed to be the active intermediate, generated during the catalytic oxidation of alkenes, are identified. It was found that supported catalysts are very economical, green and efficient in contrast to their neat complexes as well as most of the recently reported heterogeneous catalysts." @default.
• W2966537440 created "2019-08-13" @default.
• W2966537440 creator A5011350290 @default.
• W2966537440 creator A5012501941 @default.
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• W2966537440 creator A5024300120 @default.
• W2966537440 creator A5054528763 @default.
• W2966537440 creator A5060042553 @default.
• W2966537440 date "2019-07-28" @default.
• W2966537440 modified "2023-10-14" @default.
• W2966537440 title "Polymer‐anchored mononuclear and binuclear Cu ^II Schiff‐base complexes: Impact of heterogenization on liquid phase catalytic oxidation of a series of alkenes" @default.
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