Physicochemical Studies On Macrocyclic Chelates Of Cu (ii) Ni (ii)
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A nell' macrocyclic ligand (L) and its metal complexes formulated as [ MLChA J Clyrn( M Cu (11), Ni(II) L= Tz - ACAC - 20 & A = non chelating ligand )rnhave been synthesized by template condensation and high dilution techniques ji"om 4-rnHydroxy- 2, 6- Bis( hydrazino)- s- triazine ( HBHTz ), acetylacetone and the metalrnchlorides.rnThe HBHTz was synthesized ji"o/Il 4- Hydroxy- 2,6- dichloro- s- triazine ( DCHTz ) whichrnin turn synthesized ji"om cyanuric chloride and phenol / NaOH mixture.rnTz - ACAC - 20 shows low affinity for nickel (11) especially under the direct (highrndilution) synthesis, which can be ascribed to incompatible cavity size.rnThe prepared complexes were characterized by solution electronic spectra, magneticrnmoments, solution conductance measurements, atomic absorption spectroscopy, elementalrnanalysis, NMR and IR spectroscopies.rnThe electrical conductivity of the Ni (11) chelate indicated it to be 1: 2 electrolyte and thatrnof Cu (11) complex to be a non electrolyte. Magnetic susceptibilities, conductancernmeasurements & spectroscopic evidences suggest that copper complex to sholl' anrnoctahedral geometry whereas the Ni (11) complex to have a tetrahedral structure.
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