The nickel(II) complex of a new multidentate ligand containing both imidazole and pyrazole moieties

Tabbı̀, Giovanni; Driessen, Willem L.; Reedijk, J.; Veldman, Nora; Spek, Anthony L.

doi:10.1016/s0020-1693(99)00095-x

Cited by 10 publications

(3 citation statements)

References 16 publications

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“…[16][17][18][19][20][21][22] The co-ordination chemistry of the ligands containing two imidazole rings is more versatile when the chelating nitrogen donors are linked to other chelating ligands creating multi-and/or ambi-dentate ligands. 5, [23][24][25] In our previous papers we have reported results on the metal complexes of multidentate ligands containing the bis(imidazol-2-yl)methyl residues at the C-or N-termini of amino acids or peptides. 20,26-30 It is obvious from these studies that the imidazole nitrogen donor atoms are the primary metal binding sites in the copper(), nickel() and zinc() complexes of these molecules.…”

Section: Introductionmentioning

confidence: 99%

Transition metal complexes of bis(imidazol-2-yl) derivatives of dipeptides

et al. 2003

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Copper(), nickel() and zinc() complexes of the dipeptides containing chelating bis(imidazolyl) agents at the C-termini (GlyLeu-BIMA, LeuGly-BIMA, PheGly-BIMA and AlaPro-BIMA; BIMA = bis(imidazol-2-yl)methylamine) were studied by potentiometric, UV-VIS, EPR and MALDI-MS techniques. The imidazole nitrogen donor atoms were described as the primary metal binding sites forming stable mono-and bis-(ligand) complexes in the acidic pH range. The formation of dinuclear complexes was detected in equimolar solutions of copper() and dipeptides and various isomeric forms of these species ([Cu 2 L 2 ] 4ϩ and [Cu 2 H Ϫ2 L 2 ] 2ϩ ) were indentified by EPR measurements. Deprotonation and co-ordination of the amide groups of dipeptides took place in slightly alkaline solution resulting in the formation of [MH Ϫ2 L] complexes of copper() and nickel(). Metal ion co-ordination of one of the imidazole nitrogen donor atoms promoted the ionization of the pyrrole type N(1)H group of imidazole in copper() complexes and resulted in the formation of a trinuclear complex ([Cu 3 H Ϫ6 L 2 ]). The latter species contains negatively charged bridging imidazolato residues.

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Section: Introductionmentioning

confidence: 99%

Transition metal complexes of bis(imidazol-2-yl) derivatives of dipeptides

et al. 2003

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“…In recent years, pyrazole‐based chelating ligands form a variety of coordination complexes with a number of metal ions, providing varying coordination geometry and nuclearity have seen considerable interest in the designing of various pyrazole‐based ligands and to study their structural properties to lead to a complex formation (Mukherjee, 2000; Jinyuan and Woo, 1999; Tabbi et al , 1999; Bode et al , 1999). Several new pyrazole ligands have been prepared for use in the separation of metal ion like Pb(II), Hg(II).…”

Section: Introductionmentioning

confidence: 99%

Characterisation of a new tripyrazole derivative as inhibitor for the steel corrosion in acid solution

Elayyachy¹,

Kodadi²,

Hammouti

et al. 2004

Pigment &Amp; Resin Technology

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The inhibition of corrosion of steel in 1 M HCl solution by newly synthesised pyrazole derivatives has been studied by weight loss and polarisation techniques at 308°K. Its inhibitory power is compared to N,N′‐bis(3,5‐dimethylpyrazol‐1‐yl‐methyl)‐pentanolamine (Bipyr). The results obtained reveal that tripyrazole exhibits a good protection. Inhibition is found to increase with increase in inhibitor concentration. The inhibition behaviour of the compound has been explained on the basis of molecule size and charge density of adsorption active centres. The adsorption phenomenon obeys the Langmuir adsorption isotherm model.

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“…For related literature, see Adams et al (1998Adams et al ( , 2000, Bhatia et al (1983), Blake et al (2000), Burchell et al (2004), Cheng et al (1996), Figueiredo et al (2000), Gan et al (2004), Guo et al (2005), He et al (2002), Hou et al (2005), Janiak (2000), Jiang et al (1998), Ranford et al (1998), Sakamoto et al (1989), Tabbi et al (1999), Wang et al (1998), Wu & Liu (2004)…”

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confidence: 99%

[2-Oxido-1-naphthaldehyde (2-hydroxybenzoyl)hydrazonato]pyridinenickel(II)

et al. 2005

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The title complex, [Ni(C18H12N2O3)(C5H5N)], has a slightly distorted square‐planar coordination of the Ni atom with trans N atoms [Ni—N = 1.902 (2) and 2.002 (2) Å, Ni—O = 1.880 (2) and 1.927 (2) Å, N—Ni—N = 171.30 (9)° and O—Ni—O = 173.87 (8)°]. The 2‐hydroxybenzoyl hydroxy group forms an intramolecular O—H⋯N hydrogen bond with an adjacent N atom [N⋯O = 2.591 (3) Å]. Inversion‐related molecules have short Ni⋯N separations of 3.274 (3) and 3.489 (3) Å, and exhibit concomitant π–π stacking; the centroid of the benzoyl ring is some 3.34 Å from the naphthalene plane of the inversion‐related molecule.

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The nickel(II) complex of a new multidentate ligand containing both imidazole and pyrazole moieties

Cited by 10 publications

References 16 publications

Transition metal complexes of bis(imidazol-2-yl) derivatives of dipeptides

Transition metal complexes of bis(imidazol-2-yl) derivatives of dipeptides

Characterisation of a new tripyrazole derivative as inhibitor for the steel corrosion in acid solution

[2-Oxido-1-naphthaldehyde (2-hydroxybenzoyl)hydrazonato]pyridinenickel(II)

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