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Two new manganese(II) complexes based on bisaroylhydrazone derivatives: [Mn^II(L¹)₂(NO₃)₂] (1) and [Mn^II(L²)₂(NO₃)₂] (2) were synthesized via the reaction of manganese (II) nitrate tetrahydrate with bisaroylhydrazone derivative in acetonitrile at room temperature. The synthesized organic ligands and manganese (II) complexes underwent thorough characterization, and their structures were elucidated using various techniques. The X-ray crystallography results confirmed that compounds 1 and 2 are mononuclear manganese (II) complexes, where the Mn(II) ion is eight-fold coordinated within a distorted pseudo-dodecahedral coordination environment. The coordination is achieved through the binding of the metal ion to N and O atoms of two bisaroylhydrazone molecules (bi-dentate ligands) and two nitrate ions. Furthermore, density functional theory (DFT) calculations were conducted to optimize the geometry of …