Copper(II) Complexes of Hydrazone Derivatives

Abstract

Benzil, Hydrazones, Copper(II), M acroligands, Crystal StructureThree benzil based, macrocyclic oxygen-, nitrogen-, and sulfur-containing ligands, (3,4,10,11 -tetraphenyl-1,2,5,6,8,9,12,13-octaazacyclotetradeca-7,14-dithione-2,4,9,11 -tetraene) ethanol (L 1), 10,1 l-diethoxy-3,4,10,11-tetraphenyl-1,2,5,6,8,9,12,13-octaazacyclotetradeca-7.14-dithione-2,4-diene (L2), (3,4,10,11 -tetraphenyl-1,2,5,6,8,9,12,13-octaazacyclotetradeca-7.14-dione-2,4,9,l 1-tetraene) ethanol (L3); a cyclic ligand, 6-ethoxy-l,6-diphenyl-4-oxo-3,4,5,6-tetrahydro-2,3,5-triazine (L5) and two open chain ligands, benzilsemicarbazone (L6) and benzilbisthiosemicarbazone (L4) are reported. These ligands react with copper(II) chlor ide, nitrate and acetate. The complexes obtained have been characterized on the basis o f N M R , IR, electronic and mass spectral studies, conductance and analytical data. The stoichiometry and the spectroscopic data o f the complexes indicate that the copper ions are coor dinated by neutral ligands or by ligand anions formed by loss o f protons from the ligand. The molecular and crystal structure o f 6-ethoxy-l,6-diphenyl-4-oxo-3,4,5,6-tetrahydro-2,3,5-triazine (L 5) was determined by X-ray diffraction; the space group is triclinic, P 1 with a = 7.865(1), b = 14.101(6), c = 15.733(9) A, a = 69.10(3)°, ß = 75.62(2)°, y = 86.69(2)°, V = 1578(1) A 3, Z = 4.

Monitoring of Iron (Iii) Ions With a Fe3+-PVC Membrane Sensor Based on 4, 4'-Dimethoxybenzil Bisthiosemicarbazone

“…Ligand 4, 4'-Dimethoxybenzil bisthiosemicarbazone (DBTS) was synthesized and purified as described elsewhere. 45 As far as the nitrate and chloride salts of all the employed cations are concerned, they were of the highest available purity and were P 2 O 5-vacuum dried. During the experiments, triply distilled deionized water was used.…”

Application of a Carbon Paste Electrode Modified with a Schiff Base Ligand to Mercury Speciation in Water

“…The thiosemicarbazone of open chain benzylbisthiosemicarbazone (BTC) was synthesized form benzyl and thiosemicarbazide as described previously [21]. Humic acids (HA, Aldrich, 600 -1000 g mol…”

Novel complexes of Mn(III) with macrocylic porphine ligand and ethylenediamine

“…Macrocyclic complexes have received much attention [1] because they are involved in important biological processes, such as photosynthesis and dioxygen transport, in addition to catalytic properties [2] with important industrial applications. Their enhanced kinetic and thermodynamic stabilities led to potential applications as metal extrants [3], radiotherapeutic [4] and medical imaging agents [5].…”