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- W2184902021 abstract "A new series of divalent cobalt, nickel and copper complexes are prepared templately with 2,2- dihydroxyindane-1, 3-dione and aromatic diamines and comparisons between the reactivities of their 1, 2 and 1, 3 isomers was done. The complexes are characterized as distorted octahedral by elemental analyses, molar conductance, electronic spectra and IR spectral data. The origination of -C=N in the IR spectral data confirms cyclization. Oxidation followed by volumetric analysis confirms the presence of a divalent metal. The low value of molar conductance indicates them to be non-electrolytes. Present work is a template synthesis and study of big and activated dicarbonyls' reaction with variety of diamines. The reactivity of diamine varies with changed position of one amino group on benzene ring w.r.t. other. It further includes the comparison of their metal II complexes - Co(II), Cu(II) and Ni(II) . EXPERIMENTAL Materials: The Chemicals used were of Anal R grade and purchased from Aldrich fluka, sd-fine and Ranbaxy. The solvent was purified according to standard procedures. Isolation of metal Complexes: The free macrocyclic ligand was separated to observe the condensation of the starting materials but the yield of the ligand was too small as compared to the yield of the templately synthesized complex. Hence all the complexes were obtained by template synthesis. 0.4 M solution of diamino benzene and ninhydrin was made in MeOH in(~100 cm 3 ). The metal was dissolved in minimum quality of MeOH. The solution was refluxed at 85°C for 8-10 hr. (Cu/Ni=8 hrs. Co=10 hr). The extra MeOH was distilled out slowly and the mother liquor was subjected to crystallization in a desiccators for 3 days. The complexes were filtered slowly without vaccum to avoid disintegration of the complex due to pressure. The filtered complex was washed with Me2CO and cold MeOH and dried; yield 40% - 65%. The complexes are soluble in DMF and DMSO. But are insoluble in common organic solvent and water. They are thermally" @default.
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- W2184902021 date "2008-01-01" @default.
- W2184902021 modified "2023-09-27" @default.
- W2184902021 title "DIVALENT METAL COMPLEXES WITH LIGAND DERIVED FROM NINHYDRIN AND AROMATIC DIAMINES AND COMPARISONS OF THEIR REACTIVITIES" @default.
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