Complexes of lithium, sodium, potassium, magnesium and calcium were isolated by diethylene glycol dibenzoate in different organic solvents. Picrate, dinitrophenolate and orthonitrophenolate were used as anions. Stoichiometries of isolated complexes are 1:1 for alkali metal and 1:2 for alkaline earth metal complexes. Shifts in the characteristic frequencies of ligand molecule were observed in IR and¹H NMR spectra of complexes

In this paper, we study the reactivity of diimines like 2, 2'-bipyridine, 1, l0-phenanthroline and 1, 2, 4-triazines using density-based reactivity descriptors. We discuss the enhancement or diminution in the reactivity of these ligands as a function of two substituent groups, namely methyl (-CH₃) group and phenyl (-C₆H₅) group. The global reactivity descriptors explain the global affinity and philicity of these ligands, whereas the local softness depicts the particular site selectivity. The inter-molecular reactivity trends for the same systems are analysed through the philicity and group philicity indices. The 𝜎-donor character of these ligands is quantified with the help of electron density profile. In addition, the possible strength of interaction of these ligands with metal ions is supported with actual reaction energies of Ru-L complexes.