The distinct spin (Figure ; Table ) states observed in the nickel and cobalt Schiff base complexes significantly influence their electrical properties [26], particularly their conductivity and redox behavior. The Ni(II) complex, with a no-spin (diamagnetic) configuration, arises from a fully paired d 8 electronic arrangement in a low-spin square planar geometry. This results in a narrower band gap and diminished unpaired electron density, leading to reduced paramagnetic contributions and a more stabilized electronic structure. In contrast, the Co(II) complex exhibits a high-spin configuration with an unpaired spin density of 1.256, attributed to its d 7 electronic configuration in an octahedral or distorted geometry. The presence of unpaired electrons enhances spin polarization, enabling stronger interaction with external fields and charge carriers, thereby increasing conductivity and spin-dependent electron transport. This disparity underscores the ability of the Co (II) complex to engage in more dynamic redox processes, while the Ni(II) complex remains electronically stable, favoring applications requiring low reactivity and minimal electronic noise.