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• W2014376918 abstract "New N6 ligands derived from isophthaldehyde and di(2-pyridyl) methylamine were synthesized, in order to probe the corresponding copper complexes as model systems of tyrosinase. Copper(II) complexes of the N6 ligands: α,α′-bis(di (2-pyridyl)methylimino)-m-xylene (m-xylN(DPM)2) and α,α′-bis(di (2-pyridyl) methylamino)-m-xylene (m-xylNH(DPM)2) were obtained. [Cu2(m-xylN-(DPM)2(OCH3)2ClO4]ClO4 (1) and [Cu2(m-xylN(DPM)2) (OH)2ClO4]ClO4 (2) were isolated by the oxidation reaction of the cuprous species with molecular oxygen in methanol and dichloromethane solutions, respectively. Neither of the two dicopper(II) complexes showed insertion of oxygen at the arene ring under the used experimental conditions. [Cu2(m-xylNH(DPM)2Cl4]·2H2O (3) was synthesized by the direct reaction of the reduced organic ligand with cupric chloride. X-ray structures are reported: [Cu2(m-xylN-(DPM2(OCH3)2ClO4]ClO4 (4), monoclinic P21n, a=15.099(4), b=11.974(4), c=19.928(5) Å, β=93.95(1)°, Z=4, R=0.049; [Cu2(m-xylN(DPM)2) (OH)2ClO4]ClO4 (2), orthorbic P212121, a=14.188(4), b=14.275(3)c=16.763(4) Å, Z=4, R=0.062; [Cu2(m-xylNH(DPM)2Cl4]·2H2O (3), monoclinic P21c, a=13.353, b=17.030(2), c=15.547(2) Å, β=112.38(1)°, Z=4, R=0.043. The coordination geometries of the Cu(II) ion in 1 and 2 are best described as tetragonally distorted octahedral, while in 3 it is trigonal bipyramidal. Compounds 1 and 2 are doubly bridged by methoxo and hydroxo groups; the bridging angles for 1 are Cu(1)O(1)Cu(2) = 100.0(2)° and Cu(1)O(2)Cu(2) = 99.0(1)°, and for 2 Cu(2)O(1)Cu(1) = 98.2(4) and Cu(2)O(1)Cu(1) = 96.4(4)°. The methoxo complex 1 is antiferromagnetic (TM = 338 K) while the hydroxo complex 2 and the dicopper (II) complex 3 are paramagnetic." @default.
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• W2014376918 date "1996-07-01" @default.
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• W2014376918 title "Dicopper(II) complexes with hexaaza binucleating ligands derived from isophthaldehyde and di(2-pyridyl) methylamine" @default.
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• W2014376918 doi "https://doi.org/10.1016/0020-1693(95)05015-9" @default.
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