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Several Trivalent Rare Earth Complexes with 2,6-Diaminopyridine

El-Qisairi A.

Polish Journal of Chemistry

2006

Vol. 80, nr 10

1593-1599

Several trivalent rare earth complexes of the formula [LnCl2(dap)2]Cl 4H2O, where Ln = Y, La, Ce, Eu, Ho and Yb; dap = 2,6-diaminopyridine, have been synthesized and characterized by elemental analysis, conductivity measurements and spectroscopic methods (IR, 1H-NMRand 13C-NMR). The spectral data show that the ligand coordinates to the metal ions through the pyridine and amino nitrogens.

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.