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2 Polish Journal of Chemistry

2 2005

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Metal Directed Synthesis of Hexaazamacrocyclic Complexes of Co(II), Ni(II), Cu(II) and Zn(II) and Their Physico-Chemical Studies

Shakir M., Azim Y., Chishti H., Chingsubam P.

Polish Journal of Chemistry

2005

Vol. 79 / nr 7

1115-1121

A series of 18-membered N6 macrocyclic complexes was synthesized by template condensation of alfa,alfa'-dibromo-o-xylene and 2,6-diaminopyridine. The proposed stoichiometry and nature of the macrocyclic complexes have been confirmed on the basis of elemental analyses and conductivity data, respectively. The bonding in these complexes has been elucidated from the IR, and 1H-NMR spectral studies, while the overall geometry has been deduced from the UV-visible, magnetic measurements and EPR spectra.

Binuclear Octaazamacrocyclic Complexes of Cobalt(II), NIckel(II), Copper(II) and Zinc(II) DErived from Tris(2-aminoethyl)amine and 1,3-Dibromopropane; Synthesis and Characterization

Shakir M., Chingsubam P., Chishti H.

Polish Journal of Chemistry

2005

Vol. 79 / nr 11

1731-1738

A series of 20-membered binuclear octaazamacrocyclic complexes, [M2LX2 X2 [where M = Co(II), Ni(II), Cu(II) and Zn(II); X = Cl, NO3] have been synthesized by metal ion controlled reaction between tris(2-aminoethyl)amine, tren and 1,3-dibromopropane in the presence of KOH in methanol. The proposed stoichiometry and the bonding in the macrocyclic moiety to metal ions alongwith the over all stereochemistry have been derived from the results of elemental analyses, conductivity data and the information revealed from FT-IR, 1H NMR, mass, UV-Vis i ble, and EPR spectral studies. An octahedral geometry has been envis aged for Co(II), Ni(II) and Zn(II) complexes while a distortion in octahedral geometry has been noticed for Cu(II) complexes, where all four N-do nor atom of tren moiety coordinate to metal ion and the rest two coordina tion sites have been occupied by two bridging an ions.