Ionic liquids as new reaction media and catalysts have been experimentally and theoretically recognized and accepted.They are environmentally friendly or ‘‘greener’’ alternatives to organic solvents because they have very low vapor pressure and are non-explosive and thermally stable over a wide temperature range. They can be employed as solvents for a number of chemical processes, such as separation, reactions, two-phase catalysis, extractions and polymerizations. One of the new applications of ionic liquids is in the synthesis of organic compounds including amides. Carboxamide ligands have been part of the growing research in the field of coordination chemistry of transition metal complexes. Hqpzc (1) has been prepared under optimum conditions, in high yield and short reaction time. The Ni(II), Cu(II) and Zn(II), complexes of qpzc ¯ , with the formula: (2) [Ni(qpzc)N 3 ], (3) [Ni(qpzc) 2 ].H 2 O, (4)[Cu(qpzc)(OAc)].H 2 O, (5) [Cu(qpzc)(OClO 3 )(H 2 O)], (6) [Cu(qpzc)(NCS)], (7) [Cu(qpzc)N 3 ], (8) [Zn(qpzc)(OAc)(H 2 O)] Have also been synthesized and characteraized by UV-Vis, FT-IR, 1 H-NMR and elemental analysis. The structure of [Ni(qpzc)N 3 ] ( 2 ) was determined by X-ray crystallography and show distorted square planar geometry around the central metal ion. The X-ray crystal structures of [Cu(qpzc)(OAc)].H 2 O ( 4 ) and [Zn(qpzc)(OAc)(H 2 O)] ( 8 ) were also determined. The coordination geometry around the metal ions in both complexes ( 4 ) and ( 8 ) is distorted square pyramidal. The mono-anionic qpzc ¯ is a tridentate unsymmetrical ligand furnishing an N3 set, such that one N atom of the quinoline, one N atom from pyrazine, and one amido N atom occupy three basal positions of the square pyramidal coordination geometry. The acetato anion acts as a bidentate ligand in ( 4 ) and as a unidentate ligand in ( 8 ). The apical position in complex ( 8 ) is occupied by a water molecule. Quite strong O-H…O hydrogen bonds create columns of complexes [rod group p2 1 (11)] in the copper complex, but, in conjunction with ?-? interactions, a 3D edifice in the zinc complex. The electrochemical behaviour of the ligand and its complexes shows that the reduction processes corresponding to the quinoline ring occurs at more positive potentials in complexes relative to the free ligand, as expected for an anionic ligand after coordination to metals.