Author(s)

Sawsan Mohamed Al-Ashqar

Department of Chemistry, Faculty of Applied Sciences, Umm Al-Qura University, Makkah, KSA.

The reaction of L (MAD) with Cu²⁺ and Co²⁺ chlorides affords new metal complexes. The isolated solid complexes were synthesized by two different techniques i.e., chemical and tribochemical methods. Four new complexes were synthesized by direct chemical reactions of MCl₂ (M = Co²⁺ and Cu²⁺) with MAD in absolute EtOH. The isolated solid complexes were used as starting compounds to synthesize another four new complexes using tribochemical technique by grinding the previous complexes in the solid state with excess KI in agate mortar. The results of the isolated complexes indicate the substitution of the chloride by iodide ions during grinding and extraction of the complexes by a mixture of solvents (EtOH + MeOH). Also, the results suggest that no reduction of Cu²⁺ or oxidation of Co²⁺ complexes is observed. The IR spectra of the complexes suggest that L acts in a bidentate manner. Moreover, the results of electronic spectra and magnetic measurements for the chloride and iodide complexes suggest distorted-octahedral and/or tetrahedral for Cu²⁺ and high-spin octahedral and/or tetrahedral structures around the Co²⁺ ion, respectively.

Tribochemical Reactions, MAD Complexes, Spectral and Magnetic Studies, Cu²⁺ and Co²⁺ Complexes, Green Chemistry

Al-Ashqar, S. (2018) Comparative Studies of New Complexes Synthesized by Chemical and Tribochemical Reactions Derived from Malonic Acid Dihydrazide (L; MAD) with Cu²⁺ and Co²⁺ Salts. Open Journal of Inorganic Chemistry, 8, 28-42. doi: 10.4236/ojic.2018.81003.