Synthesis, characterization and spectrochemical studies on a few binuclear 𝜇-oxo molybdenum(V) complexes of pyrimidine derived Schiff base ligands

Journal of Chemical Sciences

Kinsuk Das³  Tarak Nath Mandal²  Susanta Kumar Kar1²  Ray J Butcher¹  Sangita Ray²  Samik Gupta²  Somnath Roy² 

[1] Department of Chemistry, Howard University, 2400 Sixth Street, N.W., Washington, DC 20059, USA$$;Department of Chemistry, University College of Science, 92 A.P.C. Road, Kolkata 700 009$$;Department of Chemistry, Haldia Government College, Debhog, Purba, Midnapur 721 657$$

关键词: Molybdenum(V);    Schiff base;    crystal structure;    binuclear complex;    spectral study.;   

DOI  :  

来源: Indian Academy of Sciences

【 摘 要 】

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.

【 授权许可】

Unknown