Synthesis, Structure and Catalytic Performance of N_4-Macrocycles of Fe^III and Co^II for Oxidation of Hydroquinone

Macrocycles and p-benzoquinones (p-bq) have been generally connected as potential co-synergist redox models in aerobic oxidation. to get insight for the synergist oxidation of hydroquinones (h_2q), thus, we synthesized and characterized dibenzotetraaza [14] annulene type macrocycles of fe^iii and co^ii metal ions and described by utilizing different examinations including molar conductance, ir, uv-vis, mass and cyclic voltammetric measurements. the spectroscopic and computational studies proposed that the macrocycles have saddle shape distorted octahedral structure. these macrocycles demonstrated the reversible and quasi-reversible redox process pursued by randles-sevcik equation, demonstrating the adjustment of unusual oxidation conditions of metal ions. further, the experimental consequences presented herein enlighten the catalytic activity of these macrocycles towards the oxidation of h_2q. the results indicated that in the absence of macrocycles, the molecular oxygen is inactive with h_2q but in presence of synthesized macrocycles h_2q initiates prompt oxidation with the production of h_2o_2. moreover, coii macrocycle was found to be an efficient catalyst for the oxidation of h_2q into corresponding benzoquinones.