Abstract In the present study solution and coordination chemistry of copper(II)–alkyl- N -iminodiacetate systems are studied in aqueous by potentiometry, using ion selective copper pH electrodes, EXAFS (extended X-ray absorption fine structure) dye probe molecular spectrophotometry. Alkyl- -iminodiacetates with varying alkyl chain length, methyl (CH 3 –), n -hexyl (C 6 H 13 -dodecyl 12 25 –) -o...

A tetranuclear mixed ligand copper(II) complex of a pyrazole containing Schiff base and a hydroxyhexahydropyrimidylpyrazole and copper(II) and nickel(II) complexes of the Schiff base having N-donor atoms have been investigated. A 2 equiv amount of 5-methyl-3-formylpyrazole (MPA) and 2 equiv of 1,3-diamino-2-propanol (1,3-DAP) on reaction with 1 equiv of copper(II) nitrate produce an unusual tet...

The synthesis, characterization, and reactivity properties of a mononuclear Ni(II) cis-beta-keto-enolate complex, [(6-Ph2TPA)Ni(PhC(O)C(OH)C(O)Ph)]ClO4 (1) (6-Ph2TPA = N,N-bis((6-phenyl-2-pyridyl)methyl)-N-((2-pyridyl)methyl)amine) are reported. Complex 1 was characterized by X-ray crystallography, elemental analysis, 1H NMR, and electronic absorption and infrared spectroscopy. Treatment of 1 w...

Evidence is growing to support a functional role for the prion protein (PrP) in copper metabolism. Copper ions appear to bind to the protein in a highly conserved octapeptide repeat region (sequence PHGGGWGQ) near the N terminus. To delineate the site and mode of binding of Cu(II) to the PrP, the copper-binding properties of peptides of varying lengths corresponding to 2-, 3-, and 4-octarepeat ...

A new building block containing an imidazolium salt was synthesized and used for the construction of supramolecular networks with metal ions. We discovered the concomitant formation of the N-heterocyclic carbene-copper complex (CN = 2) in the self-assembly of imidazolium dicarboxylates and copper nitrates in N,N-dimethylformamide under heating. The proton in the 2 position of the imidazolium sa...

By utilizing a pyrazole-3,5-dicarboxylic acid (H3pzdc) and flexible 1,2-di(4-pyridyl)ethylene (dpe) with various copper(ii) salts under the same solvothermal synthetic conditions, six novel coordination polymers, namely, {[Cu2(pzdc)(dpe)2]X}n (X = NO3- (1), ClO4- (2), BF4- (3), SCN- (4)), {[Cu(ii)4Cu(i)4(pzdc)4(dpe)6](H2O)4}2n (5), and {[Cu5(HPO4)2 (pzdc)2(dpe)3](H2O)5}n (6) were obtained. The ...

An extraction-spectrophotometric method for the determination of traces of copper (II) is described. The method is based on the quantitative extraction of copper as tetrabutylammonium tetrathiocyanato copper (II) into methyl isobutyl ketone, followed by spectrophotometric determination, using eriochrome black T as a metallochromic indicator. The red-violet mixed complex of copper absorbs at...