Synthesis and structure of copper (II) complexes with L-OH (L-OH = 2,6-bis-[N-(2-pyridylethyl)-formidoyl]-4-methyl-phenol)

Jorge Manzur, Ana María García, Andrés Vega, Andrés Ibañez

Resultado de la investigación: Article

20 Citas (Scopus)

Resumen

The synthesis and molecular structures of three new copper (II) complexes with the ligand 2,6-bis-[N-(2-pyridylethyl)-formidoyl]-4-methyl phenol (L-OH) are reported. The complexes were prepared by reaction of L-OH with CuX2 · nH2O, affording [Cu2(L-O)(μ-OH)(μ-ClO4)](ClO4) (I); X = CLO4-, with KOH in the reaction media; or [Cu2(L-O)(μ-Cl)2][Cu2Cl6] 0.5 (II); X = Cl, in neutral conditions. The presence of methyl 3,4-dihydroxy-benzoate (CAT-(OH)2) during the synthesis of I leads to the complex [Cu2(L-O)(μ-OH)(CH3OH)][Cu(CAT-O2) 2]0.5(ClO4) (III). This compound exhibits an uncommon anion consisting of a bis-(catecholate) cuprate (II) moiety. The complete series of complexes show bridging phenoxo groups between the copper centers, together with hydroxo and perchlorate bridges found in I or two chlorides found in II. Compound I exhibit a rather low catalytic activity for the oxidation of 3,5-ditertbutyl catechol under aerobic conditions (12% quinone formation after 48 h at room temperature, in methanol solution 1 × 10-3 M in catalyst and 1 × 10-2 M in catechol), which could be ascribed to steric limitations of the catechol to coordinate the central Cu2O2 core.

Idioma originalEnglish
Páginas (desde-hasta)115-122
Número de páginas8
PublicaciónPolyhedron
Volumen26
N.º1
DOI
EstadoPublished - 2 ene 2007

Huella dactilar

Phenol
phenols
Phenols
Copper
copper
quinones
synthesis
perchlorates
Molecular structure
cuprates
catalytic activity
Catalyst activity
Methanol
molecular structure
Negative ions
methyl alcohol
chlorides
Ligands
anions
catalysts

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Citar esto

Manzur, Jorge ; García, Ana María ; Vega, Andrés ; Ibañez, Andrés. / Synthesis and structure of copper (II) complexes with L-OH (L-OH = 2,6-bis-[N-(2-pyridylethyl)-formidoyl]-4-methyl-phenol). En: Polyhedron. 2007 ; Vol. 26, N.º 1. pp. 115-122.
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title = "Synthesis and structure of copper (II) complexes with L-OH (L-OH = 2,6-bis-[N-(2-pyridylethyl)-formidoyl]-4-methyl-phenol)",
abstract = "The synthesis and molecular structures of three new copper (II) complexes with the ligand 2,6-bis-[N-(2-pyridylethyl)-formidoyl]-4-methyl phenol (L-OH) are reported. The complexes were prepared by reaction of L-OH with CuX2 · nH2O, affording [Cu2(L-O)(μ-OH)(μ-ClO4)](ClO4) (I); X = CLO4-, with KOH in the reaction media; or [Cu2(L-O)(μ-Cl)2][Cu2Cl6] 0.5 (II); X = Cl, in neutral conditions. The presence of methyl 3,4-dihydroxy-benzoate (CAT-(OH)2) during the synthesis of I leads to the complex [Cu2(L-O)(μ-OH)(CH3OH)][Cu(CAT-O2) 2]0.5(ClO4) (III). This compound exhibits an uncommon anion consisting of a bis-(catecholate) cuprate (II) moiety. The complete series of complexes show bridging phenoxo groups between the copper centers, together with hydroxo and perchlorate bridges found in I or two chlorides found in II. Compound I exhibit a rather low catalytic activity for the oxidation of 3,5-ditertbutyl catechol under aerobic conditions (12{\%} quinone formation after 48 h at room temperature, in methanol solution 1 × 10-3 M in catalyst and 1 × 10-2 M in catechol), which could be ascribed to steric limitations of the catechol to coordinate the central Cu2O2 core.",
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author = "Jorge Manzur and Garc{\'i}a, {Ana Mar{\'i}a} and Andr{\'e}s Vega and Andr{\'e}s Iba{\~n}ez",
year = "2007",
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day = "2",
doi = "10.1016/j.poly.2006.07.027",
language = "English",
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Synthesis and structure of copper (II) complexes with L-OH (L-OH = 2,6-bis-[N-(2-pyridylethyl)-formidoyl]-4-methyl-phenol). / Manzur, Jorge; García, Ana María; Vega, Andrés; Ibañez, Andrés.

En: Polyhedron, Vol. 26, N.º 1, 02.01.2007, p. 115-122.

Resultado de la investigación: Article

TY - JOUR

T1 - Synthesis and structure of copper (II) complexes with L-OH (L-OH = 2,6-bis-[N-(2-pyridylethyl)-formidoyl]-4-methyl-phenol)

AU - Manzur, Jorge

AU - García, Ana María

AU - Vega, Andrés

AU - Ibañez, Andrés

PY - 2007/1/2

Y1 - 2007/1/2

N2 - The synthesis and molecular structures of three new copper (II) complexes with the ligand 2,6-bis-[N-(2-pyridylethyl)-formidoyl]-4-methyl phenol (L-OH) are reported. The complexes were prepared by reaction of L-OH with CuX2 · nH2O, affording [Cu2(L-O)(μ-OH)(μ-ClO4)](ClO4) (I); X = CLO4-, with KOH in the reaction media; or [Cu2(L-O)(μ-Cl)2][Cu2Cl6] 0.5 (II); X = Cl, in neutral conditions. The presence of methyl 3,4-dihydroxy-benzoate (CAT-(OH)2) during the synthesis of I leads to the complex [Cu2(L-O)(μ-OH)(CH3OH)][Cu(CAT-O2) 2]0.5(ClO4) (III). This compound exhibits an uncommon anion consisting of a bis-(catecholate) cuprate (II) moiety. The complete series of complexes show bridging phenoxo groups between the copper centers, together with hydroxo and perchlorate bridges found in I or two chlorides found in II. Compound I exhibit a rather low catalytic activity for the oxidation of 3,5-ditertbutyl catechol under aerobic conditions (12% quinone formation after 48 h at room temperature, in methanol solution 1 × 10-3 M in catalyst and 1 × 10-2 M in catechol), which could be ascribed to steric limitations of the catechol to coordinate the central Cu2O2 core.

AB - The synthesis and molecular structures of three new copper (II) complexes with the ligand 2,6-bis-[N-(2-pyridylethyl)-formidoyl]-4-methyl phenol (L-OH) are reported. The complexes were prepared by reaction of L-OH with CuX2 · nH2O, affording [Cu2(L-O)(μ-OH)(μ-ClO4)](ClO4) (I); X = CLO4-, with KOH in the reaction media; or [Cu2(L-O)(μ-Cl)2][Cu2Cl6] 0.5 (II); X = Cl, in neutral conditions. The presence of methyl 3,4-dihydroxy-benzoate (CAT-(OH)2) during the synthesis of I leads to the complex [Cu2(L-O)(μ-OH)(CH3OH)][Cu(CAT-O2) 2]0.5(ClO4) (III). This compound exhibits an uncommon anion consisting of a bis-(catecholate) cuprate (II) moiety. The complete series of complexes show bridging phenoxo groups between the copper centers, together with hydroxo and perchlorate bridges found in I or two chlorides found in II. Compound I exhibit a rather low catalytic activity for the oxidation of 3,5-ditertbutyl catechol under aerobic conditions (12% quinone formation after 48 h at room temperature, in methanol solution 1 × 10-3 M in catalyst and 1 × 10-2 M in catechol), which could be ascribed to steric limitations of the catechol to coordinate the central Cu2O2 core.

KW - Catecholase activity

KW - Copper complexes

KW - Molecular structure

KW - Pyridyl Schiff-base ligand

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U2 - 10.1016/j.poly.2006.07.027

DO - 10.1016/j.poly.2006.07.027

M3 - Article

AN - SCOPUS:33751524403

VL - 26

SP - 115

EP - 122

JO - Polyhedron

JF - Polyhedron

SN - 0277-5387

IS - 1

ER -