Dinuclear platinum(II), palladium(II), nickel(II), and copper(II) complexes of 3,5-pyrazoledicarboxylic acid

Bayón, Juan Carlos; Esteban, P.; Net, Gemma; Rasmussen, Paul G.; Baker, K. N.; Hahn, Carl W.; Gumz, Melanie M.

doi:10.1021/ic00011a023

Cited by 67 publications

(21 citation statements)

References 3 publications

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“…A cyclic tetranuclear [30], a polymeric [31], and several dinuclear [32 Á/37] copper complexes have been reported, with one of the latter containing two 3,5-dicarboxylato-pyrazolato ligands [37].…”

Section: Introductionmentioning

confidence: 99%

Two pyrazolato-bridged, linear trinuclear Cu(II) complexes. Crystal structures and magnetic properties

Driessen

Chang

Finazzo

et al. 2003

Inorganica Chimica Acta

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In honor of Professor Pierre Braunstein. AbstractThe single-crystal X-ray structures of two new linear trinuclear copper(II) complexes of 3,5-pyrazoledicarboxylic acid ( (2), with Me 2 en is N ,N -dimethylethylenediamine. Both complexes are trinuclear and have been obtained from a precursor ligand, through copper-induced amide hydrolysis. In 1, the central copper ion is in a distorted square-planar environment and the two outer copper ions are in a distorted square-pyramidal environment. All three copper ions in 2 are six-coordinated in an elongated octahedral environment. A weak, broad EPR signal centered around g 0/3.5, indicative for an S0/3/2 state, is observed and confirms both complexes to be trinuclear. Magnetic susceptibility measurements of 1 and 2 from 4 to 300 K indicate a weak anti-ferromagnetic exchange coupling, with J values of (/15 and (/19 cm (1 , respectively. #

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Section: Introductionmentioning

confidence: 99%

Two pyrazolato-bridged, linear trinuclear Cu(II) complexes. Crystal structures and magnetic properties

Driessen

Chang

Finazzo

et al. 2003

Inorganica Chimica Acta

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“…On the other hand, EPR allows one to evaluate weak exchange from data taken at high temperature. For example, weak magnetic interactions in transition metal complexes bridged by intervening ligands such as carboxylate [11,14,19], triazole [20,21], azide [7,19], pyrazole [20][21][22][23][24] etc have been studied by EPR. Tetraoxo anions such as phosphate, arsenate, vanadate, sulphate and molybdate are known to bridge mental centers [25].…”

Section: Introductionmentioning

confidence: 99%

Electron Paramagnetic Resonance Studies on cis-catena-sulphatoaqueotris (imidazole) copper (II) Exchange interactions mediated thro’sulphato bridges

Vijayaraj¹,

Jawahar²,

Anantharam³

et al. 2014

IOSRJAC

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“…Polynuclear transition metal complexes with heterocyclic ligands, such as pyrazole, pyridazine, phthalazine, pyridine, and triazole, display a variety of geometries, which have been extensively studied [1][2][3][4][5][6]. In general, structures of the complexes can be affected by the bulky auxiliary ligand.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, structures, and spectroscopic properties of copper(I) complexes bearing 7-acetamido-4-methyl-1,8-naphthyridin-2-carbaldehyde azine and 1,2-bis(diphenylphosphino)ethane ligands

et al. 2009

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A new ligand napaa (napaa = 7-acetamido-4-methyl-1,8-naphthyridin-2-carbaldehyde azine) and its two dinuclear copper(I) complexes, Cu2(napaa)(dppe)2(ClO4)2 (1) and Cu2(napaa)(PPh3)4(BF4)2 (2) (dppe = 1,2-bis(diphenylphosphino)ethane) and PPh3 = triphenylphosphine) were synthesized and characterized, and the structure of 1 was determined by X-ray crystal analysis. Each copper atom in 1 has a distorted tetrahedral geometry in which the metal center is associated to napaa and dppe ligands displaying chelating coordination modes and the naphthyridine rings of napaa are almost coplanar. The two complexes exhibit similar electronic absorption spectra with λmax at about 366 nm, which can be tentatively assigned to metal-to-ligand charge-transfer (MLCT) transition. The assignment was further supported by density functional theory (DFT) calculations.

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Dinuclear platinum(II), palladium(II), nickel(II), and copper(II) complexes of 3,5-pyrazoledicarboxylic acid

Cited by 67 publications

References 3 publications

Two pyrazolato-bridged, linear trinuclear Cu(II) complexes. Crystal structures and magnetic properties

Two pyrazolato-bridged, linear trinuclear Cu(II) complexes. Crystal structures and magnetic properties

Electron Paramagnetic Resonance Studies on cis-catena-sulphatoaqueotris (imidazole) copper (II) Exchange interactions mediated thro’sulphato bridges

Synthesis, structures, and spectroscopic properties of copper(I) complexes bearing 7-acetamido-4-methyl-1,8-naphthyridin-2-carbaldehyde azine and 1,2-bis(diphenylphosphino)ethane ligands

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