Synthesis, Crystal structure and catecholase activity of [N,N-bis(3,5-dimethylpyrazol-1-ylmethyl)-1-hydroxy-4-aminobutane] copper(II) dichloride
Résumé
ABSTRACT: A new tripodal ligand, N,N-Bis(3,5-dimethylpyrazol-1-ylmethyl)-1-hydroxy-
4-aminobutane (bpmhb), has been synthetized. Reaction of (bpmhb) with Copper (II) chloride
dihydrate [CuCl2, 2H2O] in methanol produced the new complex Cu(bpmhb)Cl2. The
complex crystallizes in the monoclinic system, space group P21, the cell dimensions are a =
7.990 Å, b = 14.620 Å, c = 8.590 Å, α = 90°, β = 95.80°, γ = 90°, V= 998.3 Å3 and Z =2.
The single-crystal X-ray structure of the title compound, N,N-Bis(3,5-dimethylpyrazol-1-
ylmethyl)-1-hydroxy-4-aminobutane Copper(II) dichloride shows that the surrounding
geometry of the copper (II) ion can be described as being intermediate between a distorted
square pyramid and a trigonal bipyramid. The OH group function form an intramolecular
hydrogen bonding with the chloride atom Cl1.
With molecular oxygen as oxidant, this complex catalyzed the conversion of catechol to
quinone with a good catalytic activity.
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