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Synthesis, characterization and crystal structure of Cu(II) complex with a diimine-dioxime ligand, [Cu-2(LH)(2)](ClO4)(2). Influence of the weak Cu center dot center dot center dot O(perchlorate) interaction on the structure of the Cu2N2O2 metallocycle

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Authors
Mirković, Marija D.
Nikolić, Nadežda S.
Mijin, Dušan Ž.
Ivic, Milka Avramov
Kapor, Agnes
Tomić, Zoran D.
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Abstract
The diimine dioxime ligand, 3,3-(1,4-butanediyl-dinitrilo)bis-2-pentanone, 2,2-dioxime (LH2), containing a N-4 donor set was prepared by the Schiff base condensation of 2-hydroxyimino-3-pentanone and 1,4-diaminobutane in two ways: in a protic and in an aprotic solvent. A higher yield of the (LH2) imine was obtained when the synthesis was performed using a protic solvent (C2H5OH) instead of aprotic benzene (78 and 30 %, respectively). The Cu(II) metal complex of diimine dioxime was synthesized in CH3OH from the perchlorate salt of LH2 in a 1:1 mole ratio. The isolated complex was characterized by the elemental analysis, IR spectroscopy and cyclic voltammetry. The structure of [Cu-2(LH)(2)](ClO4)(2) was determined by single-crystal X-ray diffraction analysis. Comparison with structurally related diimine dioxime Cu(II) complexes revealed the influence of a weak Cu center dot center dot center dot O(perchlorate) interaction on the geometry of the metallocycle.
Keywords:
Cu(II) complex / weak interactions / supramolecular aggregates / diimine-dioxime ligand
Source:
Journal of the Serbian Chemical Society, 2014, 79, 5, 545-556
Projects:
  • Magnetic and radionuclide labeled nanostructured materials for medical applications (RS-45015)
  • Study of the Synthesis, Structure and Activity of Natural and Synthetic Organic Compounds (RS-172013)
  • Noncovalent interactions of pi-systems and their role in molecular recognition (RS-172065)

DOI: 10.2298/JSC130910120M

ISSN: 0352-5139

WoS: 000336701600004

Scopus: 2-s2.0-84901443748
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URI
http://vinar.vin.bg.ac.rs/handle/123456789/6018
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Vinča

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