The observed alternating 120° bond angles across the azomethine group and the precise bond lengths within the furan heterocyclic moiety strongly justify the intrinsic stability of the Schiff base ligand. The 120° bond angles result from sp 2 hybridization in the azomethine group, creating a planar geometry that minimizes steric repulsion and enhances resonance delocalization across the ligand framework. This conjugative effect distributes electron density uniformly, thereby stabilizing the azomethine moiety against external perturbations such as protonation or oxidation. Furthermore, the planar configuration facilitates efficient π-π stacking interactions and secondary bonding with metal centers, enhancing the ligand's stability when coordinated in complex systems.