A rare polymeric azido-bridged copper(II) chain with a pentameric repeating unit: Synthesis, structure and magnetic properties

Khalaji, Aliakbar Dehno; Triki, Smaı̈l; Clemente‐Juan, Juan M.; Gómez‐García, Carlos J.

doi:10.1016/j.poly.2012.10.031

Cited by 11 publications

(6 citation statements)

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“…6 Dicyanamide-bridged complexes have a diverse variety of magnetic, 7 ferroelectric 8 and optical properties. 9 In recent years, a large number of reports have focused on the synthesis and magnetic properties of chloride-bridged, [10][11][12][13][14][15][16][17][18][19] azide-bridged [20][21][22][23][24][25] or alkoxy-bridged systems. [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41] However, chloride-bridged octahedral-tetrahedral Cu(II) complexes have seldom been reported.…”

Section: Introductionmentioning

confidence: 99%

Assembly of dinuclear copper(ii) secondary building units into polymeric complexes: crystal structures and magnetic properties

2014

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Four Cu(II) complexes, the one-dimensional [Cu(HL 1 ) 2 (CuCl 4 )] n (1), {[Cu 2 (L 1 ) 2 (N(CN) 2 )(CH 3 OH)](ClO 4 )} n (2), dinuclear [Cu 2 (L 2 ) 2 Cl 2 ] (3), and two-dimensional layered [Cu 2 (L 2 ) 2 (N(CN) 2 ) 2 ] n (4) were synthesized by Cu(II) salts (CuCl 2 •2H 2 O or Cu(ClO 4 ) 2 •6H 2 O), alkanol bidentate ligands trans-2-(1-pyrazolyl)cyclohexanol (HL 1 ) or3,5-dimethyl-N-hydroxyethyl-pyrazolyl (HL 2 ) together with sodium dicyanamide. For complex 1, the bridging chlorine atoms of the tetrahedral [CuCl 4 ] 2− moieties are located at the Jahn-Teller axis of the elongated octahedral Cu(II), forming an alternate elongated-octahedral-tetrahedral Cu(II) chain complex.For complexes 2, 3 and 4, the alkyl oxygen atoms of the deprotonated ligands HL 1 and HL 2 bridge two Cu(II) ions, yielding a dinuclear Cu(II) unit [Cu 2 (L x ) 2 ] 2+ (x = 1, 2), and one-or two-dimensional complexes via bridging dicyanamide ligands. Complex 1 shows weak ferromagnetic coupling, whilst complexes 2-4 display strong antiferromagnetic coupling or are even nearly diamagnetic due to the large Cu-O-Cu bond angles.

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Section: Introductionmentioning

confidence: 99%

Assembly of dinuclear copper(ii) secondary building units into polymeric complexes: crystal structures and magnetic properties

2014

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“…[32][33][34] In general, the azido ligand mediates two types of magnetic coupling (antiferromagnetic or ferromagnetic interactions) depending on its coordination modes (μ 1,1 or μ 1,3 ) and on the structural parameters related to the azido bridges (Cu-N distances and Cu-N-Cu angles). [35][36][37] Herein, we report the synthesis, characterization, and magnetic properties of a new copper(II) complex containing the dimeric [(N 3 )Cu II (μ 1,1 -N 3 ) 2 Cu II (N 3 )] core and the neutral donor Schiff base ligand (L) derived from pyridine-2,6-dicarbaldehyde. As the main objective of this work, we have used this complex as an efficient catalyst for the Cu-catalyzed azide-alkyne cycloaddition reaction in water without additional agents.…”

Section: Introductionmentioning

confidence: 99%

Part‐per‐million catalysis of azide‐alkyne cycloaddition reaction in water using a new ferromagnetic μ_1,1‐N₃ bridged dinuclear Cu(II) complex

Mirdarvatan

Bahramian

Khalaji

et al. 2022

Applied Organom Chemis

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An original copper(II) dimeric compound formulated as [Cu2(μ1,1‐N3)2L2(N3)2].2CHCl3 (1), with L = 2,6‐pyridinedicarboxaldehydebis(p‐iodophenyl‐imine), has been synthesized and characterized. Single crystal X‐ray structural characterization revealed that this complex displays a centrosymmetric dinuclear structure in which the two Cu(II) centers are connected by double symmetric μ1,1 (end‐on, EO) azido bridges, generating distorted octahedral CuN6 coordination geometry. Magnetic susceptibility measurements indicate a ferromagnetic Cu···Cu coupling with J = 26.7 cm−1 (J being the parameter of the exchange Hamiltonian H = −2JS1S2). The catalytic properties of complex 1 have been evaluated in the one‐pot azide‐alkyne cycloaddition reaction in water without any additional reducing agents or bases. As expected, the absence of any catalyst did not lead to product formation, whereas when complex 1 was introduced as catalyst, the reaction led to the desired product with different chemical yields (10–98%), for which the highest one (98%) corresponds to the reaction performed in the presence of 125 ppm of 1 in water at 90 C. These optimized parameters have been then taken into account to extend the initial reaction based on benzyl chloride and simple alkyne to different substituted benzyl chloride and alkyne molecules.

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“…Multinuclear copper(II) complexes containing Schiff base ligands have received attention for their structural diversity [1][2][3][4][5][6] and for various applications and properties, such as electrochemical [7,8] and magnetic properties [9,10] and antiradical effects [11]. Considerable effort has been devoted to the preparation and characterization of multinuclear copper (II) complexes with various Schiff base ligands and bridging dicyanamido [12], azido [13][14][15] and acetate [16] ligands.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, our research group has reported tetranuclear copper(II) complexes of tetradentate N 2 O 2 Schiff base ligands [6,13,14].…”

Section: Introductionmentioning

confidence: 99%

A novel trinuclear copper(II) complex containing a symmetric tetradentate N2O2 Schiff base ligand: Synthesis, characterization, crystal structure and its usage as a new precursor for the preparation of CuO particles

et al. 2017

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A novel linear centrosymmetric trinuclear copper(II) Schiff base complex with the chemical formula [{Cu(-L)(H 2 O)(-NO 3)} 2 Cu]H 2 O, where L = N,N-bis(2-hydroxy-4methoxybenzophenone)-2,2-dimethyl-1,3-propanediamine, was synthesized and characterized by elemental analyses, FT-IR spectroscopy, TG-TA and X-ray crystallography. Single X-ray diffraction analysis revealed four -phenoxidoand two -NO 3 bridges in the omplex. The equatorial plane of the three linearly arranged copper(II) atoms is formed by oxygen and nitrogen atoms of two anionic tetradentate Schiff base ligands, each of them coordinated to one of the terminal copper(II) ions. The central copper(II) ion is located in an inversion centre and bonded to four -oxygen atoms of the same ligand. Thermogravimetric analysis of the complex revealed its thermal stability and decomposition pattern. Finally, the complex was used for the preparation of CuO particles by solid state thermal decomposition.

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A rare polymeric azido-bridged copper(II) chain with a pentameric repeating unit: Synthesis, structure and magnetic properties

Cited by 11 publications

References 65 publications

Assembly of dinuclear copper(ii) secondary building units into polymeric complexes: crystal structures and magnetic properties

Assembly of dinuclear copper(ii) secondary building units into polymeric complexes: crystal structures and magnetic properties

Part‐per‐million catalysis of azide‐alkyne cycloaddition reaction in water using a new ferromagnetic μ_1,1‐N₃ bridged dinuclear Cu(II) complex

A novel trinuclear copper(II) complex containing a symmetric tetradentate N2O2 Schiff base ligand: Synthesis, characterization, crystal structure and its usage as a new precursor for the preparation of CuO particles

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A rare polymeric azido-bridged copper(II) chain with a pentameric repeating unit: Synthesis, structure and magnetic properties

Cited by 11 publications

References 65 publications

Assembly of dinuclear copper(ii) secondary building units into polymeric complexes: crystal structures and magnetic properties

Assembly of dinuclear copper(ii) secondary building units into polymeric complexes: crystal structures and magnetic properties

Part‐per‐million catalysis of azide‐alkyne cycloaddition reaction in water using a new ferromagnetic μ1,1‐N3 bridged dinuclear Cu(II) complex

A novel trinuclear copper(II) complex containing a symmetric tetradentate N2O2 Schiff base ligand: Synthesis, characterization, crystal structure and its usage as a new precursor for the preparation of CuO particles

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Part‐per‐million catalysis of azide‐alkyne cycloaddition reaction in water using a new ferromagnetic μ_1,1‐N₃ bridged dinuclear Cu(II) complex