Structural and magnetic characterization of 1-D complexes constructed from pyrazole-3,5-dicarboxylate bridging multi copper(II) centers

Massoud, Salah S.; Louka, Febee R.; Nguyen, Lam T.; Mikuriya, Masahiro; Albering, Jörg; Mautner, Franz A.

doi:10.1016/j.ica.2010.11.014

Cited by 29 publications

(9 citation statements)

References 38 publications

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“…The absorption features in all three complexes are characteristics of mononuclear Cu(II) compounds supported by nitrogen enriched ligands in square pyramidal geometry. [41][42][43][44] The red-shifts observed in methanol are minor (ca. 10 -20 nm) and may be attributed to the slight distortion of the geometry but as observed in EPR spectra (vide infra), all of the complexes remain in distorted square pyramidal geometry.…”

Section: Optical Spectroscopymentioning

confidence: 99%

Mononuclear nickel (II) and copper (II) coordination complexes supported by bispicen ligand derivatives: Experimental and computational studies

Singh¹,

Niklas²,

Poluektov³

et al. 2017

Inorganica Chimica Acta

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Section: Optical Spectroscopymentioning

confidence: 99%

Mononuclear nickel (II) and copper (II) coordination complexes supported by bispicen ligand derivatives: Experimental and computational studies

Singh¹,

Niklas²,

Poluektov³

et al. 2017

Inorganica Chimica Acta

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“…[1][2][3][4] In addition to the terminal monodentate nature of the azido ligand [1][2][3][4] many bridging coordination modes were reported where a magnetic super-exchange mechanism is known to occur through various modes. [5][6][7][8][9][10][11][12][13][14][15][16] These include single and double μ 1,3 -N 3 (end-to-end, EE) [5][6][7][8][9][10][11][12][13][14][15][16][17] and μ 1,1 -N 3 (endon, EO), [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] μ 1,1,3 -N 3 , μ 1,1,1 -N 3 ...…”

Section: Introductionmentioning

confidence: 99%

Metal ions directing the geometry and nuclearity of azido-metal(ii) complexes derived from bis(2-(3,5-dimethyl-1H-pyrazol-1-yl)ethyl)amine

et al. 2013

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The reaction of a methanolic solution containing M(ClO(4))(2)·nH(2)O (M = Cu, Ni, Zn or Cd) or CoCl(2)·6H(2)O with bis(2-(3,5-dimethyl-1H-pyrazol-1-yl)ethyl)amine (bedmpza) in the presence of NaN(3) afforded the complexes [Cu(bedmpza)(μ(1,1)-N(3))](2)(ClO(4))(2) (1), [Ni(bedmpza)(N(3))(μ(1,1)-N(3))](2)·1.5H(2)O (2), [Co(bedmpza)(N(3))(2)] (3), [Zn(bedmpza)(N(3))]ClO(4) (4) and [Cd(bedmpza)(N(3))(μ(1,1)-N(3))](2)·1.5H(2)O (5). The five complexes were characterized by spectroscopic techniques and their molecular structures were determined by single crystal X-ray crystallography. The two mononuclear complexes 3 and 4 display distorted TBP and tetrahedral geometry, respectively with the azide ions acting as monodentate ligands. Doubly bridged end-on-azido dinuclear complexes were obtained in the remaining compounds. Compounds 2 and 5 are isomorphic with distorted octahedral geometry, whereas distorted square pyramidal geometry was determined in the Cu(II) complex 1. The magnetic properties for complexes 1 and 2 were investigated by measuring the magnetic susceptibilities at variable temperatures (300-2 K). The Ni(II) complex exhibits moderate ferromagnetic coupling, whereas [Cu(bedmpza)(μ(1,1)-N(3))](2)(ClO(4))(2) (1) which contains two crystallographic independent dinuclear subunits in the unit cell, with different Cu-N(N3)-Cu bond angles, reveals different signs in the magnetic coupling. The complex represents the first example in the literature that has simultaneously two moieties with ferro- (J = 15.4 cm(-1)) and antiferromagnetic (J = -18.9 cm(-1)) interactions.

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“…Searching the CSD database (online WebCSD v1.1.1, last updated: 2013-03-06) with H 3 pdc ligand, it was found that many complexes with singular TM (102 hits) or Ln atoms (22 hits) have been synthesized. [24][25][26][27][28][29][30][31][32] However, still a limited number of 3d-4f heterometallic complexes (24 hits) have been reported so far, 23,33,34 including our recent work on [Zn 3 Y-( pdc) 3 (H 2 O)] n and {[Zn 3 Ln( pdc) 3 (H 2 O)]•0.125H 2 O} n that exhibited very good europium luminescence. 35 Coordination polymers are crystalline and constituted by networks of metal ions held in place by multidentate organic molecules.…”

Section: Introductionmentioning

confidence: 95%

Six new 3d–4f heterometallic coordination polymers constructed from pyrazole-bridged CuIILnIII dinuclear units

Yang¹,

Silva²,

Shi³

2013

Dalton Trans.

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Reactions of lanthanide chlorides, copper hydroxycarbonate and 3,5-pyrazole dicarboxylic acid (H3pdc) under hydrothermal conditions result in six new 3d-4f heterometallic coordination polymers with two types of structures. Compounds [CuLn2(pdc)2(Hpdc)(H2O)4]·2H2O (Ln = Tb (1), Dy (2), Er (3), and Y (4) exhibit a layered porous structure, made up of Cu(II)Ln(III) di-nuclear units which are connected by protonated Hpdc(2-) ligand, while the others [Cu3Ln4(pdc)6(H2O)8] (Ln = Eu (5), Gd (6)) display a three-dimensional (3-D) framework structure, in which six Cu(II)Ln(III) di-nuclear units are cross-linked by two coordinated lanthanide atoms. The catalytic properties of 3 are investigated showing its activity and recyclability in the reaction of cyclopropanation of styrene.

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Structural and magnetic characterization of 1-D complexes constructed from pyrazole-3,5-dicarboxylate bridging multi copper(II) centers

Cited by 29 publications

References 38 publications

Mononuclear nickel (II) and copper (II) coordination complexes supported by bispicen ligand derivatives: Experimental and computational studies

Mononuclear nickel (II) and copper (II) coordination complexes supported by bispicen ligand derivatives: Experimental and computational studies

Metal ions directing the geometry and nuclearity of azido-metal(ii) complexes derived from bis(2-(3,5-dimethyl-1H-pyrazol-1-yl)ethyl)amine

Six new 3d–4f heterometallic coordination polymers constructed from pyrazole-bridged CuIILnIII dinuclear units

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