Ten new binuclear singly oxo-bridged molybdenum complexes (complexes 1-10) were prepared using five pyrimidine derived Schiff base ligands and two Mo(V) precursors (NH₄)₂MoOCl₅ and (NH₄)₂MoOBr₅. The ligands are prepared by the condensation of 4,6-dimethyl 2-hydrazino pyrimidine with salicylaldehyde (for HL₁), 𝑜-hydroxy acetophenone (for HL₂) and substituted salicylaldehydes (for HL₃, HL₄ and HL₅) respectively. These ligands are already reported as good donors for Mo(VI) state. The 𝜇-oxo Mo(V) complexes reported here bears a distorted octahedral geometry around each Mo atom with either N₂O₂Cl or N₂O₂Br chromophores. Fine variations in the spectroscopic behaviour of the complexes are observed in accordance with the varying electron donating properties of the ligands. All the complexes are unstable in solution and X-ray quality crystal of complex 1 could be isolated. All the complexes are characterized by IR and UV-Vis spectra.