Abstract
The mixed-ligand complexes of Ru(phen)2Cl2.2H2O and Ru(bipy)2Cl2.2H2O with 2,6-diacetylpyridinedihydrazone were prepared and characterized using elemental analyses and spectroscopic techniques. Semi-empirical (PM3) and ab initio (HF/3-21G*) methods were used for the calculations of geometries, heat of formation, binding and stabilization energies. The elemental analyses were satisfactory when compared with the calculated values. The infrared and UV-Vis spectra as well as the fragmentation patterns in the mass spectra were consistent with octahedral Ru(II) complex. The conductivity measurements confirmed the 1:2 electrolyte nature of the complexes. The theoretical studies revealed higher stabilization and binding energies for the [Ru(phen)2L]2+ species which indicated that it is thermodynamically more stable.
Acknowledgments
F. A. O. Adekunle is grateful to Professor Dipankar Datta of Indian Association for the Cultivation of Science (IACS), Calcutta, India, for a laboratory space.
He is also grateful to Third World Academy of Science (TWAS), Trieste, Italy, and Indian Association for the Cultivation of Science for a Post-Doctoral Fellowship.