Synthesis, characterization and spectrochemical studies on a few binuclear 𝜇-oxo molybdenum(V) complexes of pyrimidine derived Schiff base ligands
Samik Gupta Somnath Roy Tarak Nath Mandal Kinsuk Das Sangita Ray Ray J Butcher Susanta Kumar Kar
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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.
Samik Gupta1 Somnath Roy1 Tarak Nath Mandal1 Kinsuk Das2 Sangita Ray1 Ray J Butcher3 Susanta Kumar Kar1
Volume 135, 2023
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