Four new bis-chelate ML₂ complexes (M = Cu²⁺, Ni²⁺, Zn²⁺, VO²⁺ and L = 1-[Furan-2-ylmethylimino)methyl]naphthalene-2-olate) with bidentate NO Schiff base ligand were synthesized and characterized by spectral and analytical techniques. The crystal structures of CuL₂, NiL₂, and VOL₂ were determined by single crystal X-ray analysis. These complexes crystalized in the monoclinic system with the space groups of P2₁/n, P2₁/n, and C2/c, respectively. The Schiff base ligand acts as bidentate ligand and coordinates to the metal center via N and O atoms. The NiL₂ and CuL₂ complexes exhibit a distorted square planar coordination geometry while in the case of VOL₂ the geometry is distorted square-pyramidal. In all cases, two Schiff base ligands bind to the metal centers in the trans O–M–N manner. Thermal analysis and thermal decomposition of the titled complexes were investigated. The data of TGA …