An asymmetric dinuclear copper(II) complex with phenoxo and acetate bridges: Synthesis, structure and magnetic studies

Dutta, Gorachand; Debnath, Rajib Kumar; Kalita, Apurba; Kumar, Pankaj; Sarma, Moushumi; Shankar, R.; Mondal, Biplab

doi:10.1016/j.poly.2010.10.029

Cited by 20 publications

(13 citation statements)

References 43 publications

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“…Such symmetrically or asymmetrically dibridged complexes with µ-phenoxo, µ-alkoxo or µhydroxo di-copper(II) core have been the subject of a considerable amount of work in terms of correlating structure and magnetic properties [1,2,[7][8][9][10][11]. Moreover, doubly phenoxo bridged binuclear Cu(II) complexes have also considerable interest as they provide the simplest case of magnetic interaction including only two unpaired electrons [2,6,11,12].…”

Section: Introductionmentioning

confidence: 99%

Doubly phenoxide-bridged binuclear copper(II) complexes with ono tridentate schiff base ligand: Synthesis, structural, magnetic and theoretical studies

et al. 2015

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International audienceThe tridentate ONO-donor Schiff base ligand H2L, derived from the condensation of 1-anisyl-1,3-butanedione and 2-aminophenol, was generated in situ and reacted with Cu(NO3)2*3H2O to yield two doubly phenoxo bridged di-copper(II) complexes depending on the nitrogenous base used. [Cu2L2] (1) is obtained in 85% and 75% yield in the presence of pyridine or 4-picoline, respectively, and [(py-tBu)2Cu2L2] (2) is isolated in 75% yield in the presence of 4-tert-butylpyridine. Compounds 1 and 2 were characterized in the solid-state by elemental analysis and FT-IR spectroscopy. Single crystal X-ray diffraction study reveals that in 1 the two four-coordinated copper atoms adopt a square planar geometry, whereas in 2 each Cu(II) metal ion shows a five coordinate square pyramidal (ONO,N + O) geometry. In each dimer, two μ-phenolic oxygen atoms bridge the two half-units forming a planar Cu2O2 core. EPR studies in fluid solutions indicate that the dimeric structure of 1 and 2 is destroyed upon dissolution. In the solid-state, 1 is EPR silent, whereas 2 presents an unresolved broad resonance (ΔH peak-to-peak = 71.5 G) with g = 2.071 at 298 K, along with the triplet state (S = 1) signature at g = 4.181. Variable temperature (2-300 K) magnetic susceptibility measurements exhibit strong antiferromagnetic interactions between the Cu(II) centers with a J value of −397 cm−1 for 1, while no interaction operates between the two spins localized on Cu(II) metal ions in 2. Ab initio calculations were also performed to supplement the experimental results

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Section: Introductionmentioning

confidence: 99%

Doubly phenoxide-bridged binuclear copper(II) complexes with ono tridentate schiff base ligand: Synthesis, structural, magnetic and theoretical studies

et al. 2015

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“…The ligand was prepared according to literature procedure [17] and characterized by X-ray crystallography [18]. 1 …”

Section: Synthesis Of Lig 2 Hmentioning

confidence: 99%

Synthesis, characterization and catalytic properties for olefin polymerization of two new dimeric zirconium(IV) complexes having diamine-bis(phenolate) and chloride ligands

Bisz

Białek

Zarychta

2015

Applied Catalysis A: General

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“…Both the complexes have been expected to show a similar behavior. The dinuclear complexes of copper(II) with Schiff-base ligands have reported to show antiferromagnatic interactions between the metal centers [28,29]. The magnetic moment of two isolated copper(II) ions has been calculated to be 2.83 BM.…”

Section: Synthesis and Characterizationmentioning

confidence: 99%

Synthesis, characterization and catalytic activities towards epoxidation of olefins of dinuclear copper(II) complexes

Halder

Mukherjee

Ghosh

et al. 2015

Journal of Molecular Structure

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An asymmetric dinuclear copper(II) complex with phenoxo and acetate bridges: Synthesis, structure and magnetic studies

Cited by 20 publications

References 43 publications

Doubly phenoxide-bridged binuclear copper(II) complexes with ono tridentate schiff base ligand: Synthesis, structural, magnetic and theoretical studies

Doubly phenoxide-bridged binuclear copper(II) complexes with ono tridentate schiff base ligand: Synthesis, structural, magnetic and theoretical studies

Synthesis, characterization and catalytic properties for olefin polymerization of two new dimeric zirconium(IV) complexes having diamine-bis(phenolate) and chloride ligands

Synthesis, characterization and catalytic activities towards epoxidation of olefins of dinuclear copper(II) complexes

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