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

@article{Chandra2004EPRMA,
  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},
  year={2004},
  volume={60 1-2},
  pages={
          147-53
        }
}
  • 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.
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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
TLDR
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Spectral studies of cobalt(II) complexes of 12-membered macrocyclic ligands having thiosemicarbazone moieties.
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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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References

SHOWING 1-10 OF 18 REFERENCES
Synthesis, structural and spectral studies of 5-methyl 2-furaldehyde thiosemicarbazone and its Co, Ni, Cu and Cd complexes
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
Synthesis and electron spin resonance studies of copper(II) complexes with acid amide derivatives of 2-amino and 2,6-diaminopyridine☆
Abstract The reaction of copper(II) chloride, bromide, nitrate and perchlorate with acid amide ligands derived from 2-amino and 2,6-diamino pyridine was investigated. Electron spin resonance,Expand
Synthesis, characterisation, X-ray structure and biological activity of three new 5-formyluracil thiosemicarbazone complexes.
TLDR
Three new complexes of transition metals as copper, nickel and cobalt with 5-formyluracil thiosemicarbazone (H3ut) have been synthesised and characterised by single-crystal X-ray diffraction and demonstrated low activity in cell growth, while the copper complex that is more active has been tested also on a third leukemic human cell line (U937), but it was not able to induce apoptosis on all cell lines. Expand
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
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