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<strong>Application of polymer-bound Cu(II) complex of 2-phenylbenzimidazole towards oxidative bromination and oxidative esterification of organic substrates</strong>

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Title Statement <strong>Application of polymer-bound Cu(II) complex of 2-phenylbenzimidazole towards oxidative bromination and oxidative esterification of organic substrates</strong>
 
Added Entry - Uncontrolled Name Gayathri, V ; Department of Chemistry, Bangalore University, Bangalore, India
Shilpa, E R ; Department of Chemistry, Bangalore University, Bangalore, India
 
Uncontrolled Index Term Cu(II) phenylbenzimidazole; Methyl benzoate; Oxidative bromination; Oxidative esterification
 
Summary, etc. <p><span>Application of polymer immobilized Cu(II)(PS-Cu(II)PBMZL) complex of 2-phenylbenzimidazole in oxidative bromination and oxidative esterification of organic compounds is reported. The complex has been characterized by CHNS analysis, UV-Vis/DRS, FT-IR, ESR spectroscopic studies, magnetic moment measurements and TG analysis. A shift in νC=N in the polymer-bound complex compared with the ligand indicates its complexation to Cu(II) center. A distorted octahedral coordination of Cu(II) in PS-Cu(II)PBMZL is confirmed by the electronic spectral data and the efficient binding of PBMZL is ascertained by adecrease in the intensity of νCH2Cl peak in the PS-PBMZL compared to the polymer support. An array of experiments has been carried out to assess the influence of various reaction parameters on the performance of PS-Cu(II)PBMZL. The activity of the polymer-bound complex is higher than the unbound complex. In the case of oxidative bromination, PS-Cu(II)PBMZLH displayed a 65% phenol conversion with 61% 2-bromophenol selectivity. The % benzaldehyde conversion and methyl benzoate selectivity in the case of oxidative esterification has been found to be 79 and 82%. Compiling all these results along with the knowledge obtained regarding the most probable reactive species, tentative mechanisms have been proposed.</span></p>
 
Publication, Distribution, Etc. Indian Journal of Chemical Technology (IJCT)
2022-10-19 15:20:58
 
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http://op.niscair.res.in/index.php/IJCT/article/view/67626
 
Data Source Entry Indian Journal of Chemical Technology (IJCT); ##issue.vol## 28, ##issue.no## 5 (2021): Indian Journal of Chemical Technology
 
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