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Synthesis, structure and catalytic properties of tripodal amino-acid derivatized pyrazole-based ligands

✍ Scribed by Nouria Boussalah; Rachid Touzani; Ibrahim Bouabdallah; Sghir El Kadiri; Said Ghalem

Publisher
Elsevier Science
Year
2009
Tongue
English
Weight
498 KB
Volume
306
Category
Article
ISSN
1381-1169

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✦ Synopsis

A synthesis of five functional multidendate ligand: methyl 2-(bis ((3,5-

Copper (II) complexes of these compounds were examined for their catalytic properties. The in situ generated copper (II) complexes were suitable catalysts for the catalytic oxidation of catechol substrate to quinone with dioxygen at ambient condition. All complexes catalyze the oxidation reaction with the rate varying from a high of 11.8250 mol L -1 min -1 for the L2[Cu(CH 3 CO 2 ) 2 ] complex to a weaker rate of 0.7875 mol L -1 min -1 for L3[Cu(NO 3 ) 2 ].

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A group of a diverse family of dinuclear copper(II) complexes derived from pyrazole-containing tridentate N 2 O ligands, 1,3-bis(3,5-dimethylpyrazol-1-yl)propan-2-ol (Hdmpzpo), 1,3-bis(3-phenyl-5-methyl pyrazol-1-yl)propan-2-ol (Hpmpzpo) and 1,3-bis(3-cumyl-5-methylpyrazol-1-yl)propan-2-ol (Hcmpzpo)