EPR, magnetic and spectral studies of copper(II) and nickel(II) complexes of schiff base macrocyclic ligand derived from thiosemicarbazide and glyoxal.

  title={EPR, magnetic and spectral studies of copper(II) and nickel(II) complexes of schiff base macrocyclic ligand derived from thiosemicarbazide and glyoxal.},
  author={S. Chandra and X. Sangeetika},
  journal={Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy},
  volume={60 1-2},
  • S. Chandra, X. Sangeetika
  • Published 2004
  • Chemistry, Medicine
  • Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy
A new macrocylic Schiff base 1,2,5,6,8,11-hexaazacyclododeca-7,12-dithione-2,4,8,10-tetraene(H(2)L(4)) containing thiosemicarbazone moiety is readily prepared and characterized for the first time with fairly good yield. Macrocylic ligand (H(2)L(4)) is prepared from the mesocyle 6-ethoxy-4-thio-2,3,5-triazine(H(2)L(3)) in ethanol with copper chloride acting as template using high dilution technique. The complexes of macrocylic ligand with a general composition M(H(2)L(4))X(2) [where M=Cu(II) or… Expand
Binary and ternary copper(II) complexes of a tridentate ONS ligand derived from 2-aminochromone-3 carboxaldehyde and thiosemicarbazide: synthesis, spectral studies and antimicrobial activity.
The tridentate ONS donor ligand and most of its metal complexes showed antibacterial activity towards Gram-positive bacteria, Gram-negative bacteria, yeast, yeast and fungus, as well as conductivity and magnetic susceptibility measurements. Expand
Synthesis, structural analysis and cytotoxic effect of copper(II)-thiosemicarbazone complexes having heterocyclic bases: A selective naked eye sensor for F− and CN−
Abstract A series of four new mononuclear mixed ligand copper(II) complexes of the type [Cu(L)(diimine)] (1–4) [where L = {1-(2-hydroxy-3,5-diiodobenzylidene)-4-phenylthiosemicarbazide}; diimine =Expand
Spectroscopic approach in characterization of chromium(III), manganese(II), iron(III) and copper(II) complexes with a nitrogen donor tetradentate, 14-membered azamacrocyclic ligand.
  • S. Chandra, L. Gupta
  • Chemistry, Medicine
  • Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy
  • 2005
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Spectral studies of cobalt(II) complexes of 12-membered macrocyclic ligands having thiosemicarbazone moieties.
The various physico-chemical techniques suggest a coordination number six (octahedral geometry) for chloro, nitrato, bromo and thiocyanato complexes, and five-coordinated trigonal bipyramidal geometry for sulphato complexes. Expand
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Abstract The reaction of dimethyl tin(IV) dichloride with 1,2-diphenylethane-1,2-dione dihydrazone in the presence of metal ions in a 2:2:1 molar ratio resulted in the isolation of macrocyclicExpand
Synthesis and spectral characterization of 14- and 16-membered tetraazamacrocyclic Schiff base ligands and their transition metal complexes and a comparative study of interaction of calf thymus DNA with copper(II) complexes.
The square planar geometry for complexes derived from ligand L(2) with distortion in Cu(II) complex have been confirmed on the basis of results of electronic and electron spin resonance spectral studies and magnetic moment measurements. Expand
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A macrocyclic Schiff-base (H2L) ligand is prepared via condensation of 2,6-pyridine dicarboxaldehyde with triethylene tetramine. The ligand is characterized using elemental analysis, by massExpand


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Abstract The reaction of cobalt, nickel, copper and cadmium chlorides and bromides with 5-methylfurfural thiosemicarbazone (M5FTSC) leads to the formation of two series of new complexes:Expand
In vitro and in vivo antitumour studies of a new thiosemicarbazide derivative and its complexes with 3d-metal ions
A new ligand, 1-(2-furanthiocarbo)-3-thiosemicarbazide (H2ftsc), prepared from thiosemicarbazide and carboxymethyl-2-furandithioate, forms complexes [Mn(ftsc)(H2O)2], [Pd(ftsc)] · 2H2O,Expand
Studies on some antifungal transition metal chelates of N-(5-phenyl-1, 3, 4-thiadiazol-2-yl) dithiocarbamic acid
Abstract Mn(III), Fe(III), Co(II), Ni(II), Cu(II) and Zn(II) chelates of N - (5 - phenyl - 1, 3, 4 - thiadiazol - 2 - yl) dithiocarbamic acid have been prepared and authenticated by analytical,Expand
Synthesis and characterization of five-coordinate macrocyclic complexes of nickel(II) and copper(II)
Abstract The template condensation of the ligand 1,29,10-tetraphenyl-3,4,7,8-tetraazonona-2,4,6,8-tetraen-1,10-dione and aliphatic diamines like ethanediamine and 1,2-propanediamine in the presenceExpand
Synthesis, characterization, antifungal properties and X-ray crystal structures of five- and six-coordinate copper(II) complexes of the 6-methyl-2-formylpyridine4N-dimethylthiosemicarbazone
Abstract Copper(II) complexes of formulas, [Cu(NNS)(NO3)(H2O)]·H2O and [Cu(NNS)2] (NNS=anionic form of the 6-methyl-2-formylpyridine4N-dimethylthiosemicarbazone) have been synthesized andExpand
Chromium(III), manganese(II), iron(III), cobalt(II), nickel(II) and copper(II) complexes with a pentadentate, 15-membered new macrocyclic ligand
Complexes of CrIII, MnII, FeIII, CoII, NiII and CuII containing a macrocyclic pentadentate nitrogen–sulphur donor ligand have been prepared via reaction of a pentadentate ligand (N3S2) withExpand
Nuclease activity of 2-substituted heteroaromatic thiosemicarbazone and semicarbazone copper(II) complexes
Copper(II) Schiff base complexes derived from furan-2-carboxaldehyde, 2-furylmethyl ketone, thiophene-2-carboxaldehyde and methyl-2-thienyl ketone with semicarbazide and thiosemicarbazide have beenExpand
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Twelve-, fourteen- and sixteen-membered macrocyclic ligands and a study of the effect of ring size on ligand field strength
Complexes of CrIII and NiII with a macrocyclic tetradendate 12-, 14- and 16-membered nitrogen donor ligand were prepared and characterized on the basis of elemental analysis, molar conductance,Expand