novel, highly efficient, and one-pot microwave-assisted synthesis of 2,4,5-trisubstitutedimidazoles using a newly developed Schiff’s base complex nickel catalyst (Ni-C) is described. The approach involves the reaction of various aldehydes with benzil and ammonium acetate in the presence of the Ni-C catalyst to furnish cyclized products in excellent yields. The Ni-C catalyst exhibited remarkable catalytic