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- W2224872326 abstract "The reaction of 4-methyl-2,6-bis(3,5-dimethyl-1H-pyrazol-1-yl)methyl)phenol and Co(NO3)2·6H2O in MeCN gives rise to [Co2(L)2(N3)2] (1), a dinuclear five coordinated complex of Co(II), in satisfactory yield. The complex has been characterized by C, H and N microanalyses, FT-IR and UV–Vis spectral measurements. A single crystal X-ray diffraction study of 1 reveals that each Co(II) atom is in a distorted square-pyramidal geometry. Electrochemical studies in CH3CN showed that the Co(II)–Co(III)/Co(III)–Co(III) redox couple appears to be quasi-reversible (E½ = 0.409 V), while the corresponding Co(II)–Co(III)/Co(II)–Co(II) couple is mostly irreversible (E½ = −0.447 V). This complex displays modest catalytic activity toward the oxidation of various allylic compounds using TBHP as an oxidant in MeCN under mild conditions. A radical trapped experiment carried out in the presence of 4-tert-butylphenol clearly reveals that the epoxidation reactions occur purely through a radical pathway rather than a concerted one. Low temperature magnetic studies showed that the present Co(II) dimeric complex possesses a high positive magnetic anisotropy (D = +29.8 cm−1) and a weak ferromagnetic exchange interaction (2J = +10.3 cm−1)." @default.
- W2224872326 created "2016-06-24" @default.
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- W2224872326 date "2016-02-01" @default.
- W2224872326 modified "2023-09-26" @default.
- W2224872326 title "Synthesis, structure, catalytic and magnetic properties of a pyrazole based five coordinated di-nuclear cobalt(II) complex" @default.
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- W2224872326 doi "https://doi.org/10.1016/j.poly.2015.12.062" @default.
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