Peroxo Complexes of Molybdenum(VI) Containing Mannich Base Ligands

Abstract

The molybdenum(VI)-peroxo complexes containing Mannich base ligands having a formula as [MoO(O 2 [where L-L＝morpholinobenzyl benzamide (MBB), piperidinobenzyl benzamide (PBB), morpholinobenzyl urea (MBU), piperidinobenzyl urea (PBU), morpholinobenzyl thiourea (MBTU), piperdinobenzyl thiourea (PBTU)] have been synthesized and characterized by physico-chemical, electrochemical techniques and TGA/DTA studies. The complexes have been prepared by stirring ammonium molybdate and excess of 30% aqueous-H 2 O 2 and then treatment with ethanolic solution of the ligand. Studies revealed that these complexes were non-electrolytes and diamagnetic in nature. The ligands are bound to metal in a bidentate mode through carbonyl oxygen/thiocarbonyl sulphur and the ring nitrogen. The cyclic voltammograms of the complexes show two quasi-reversible steps involving complexes. The complexes have also been tested for antibacterial activity against Salmonella and Kleibsella. The antibacterial study of the ligands and complexes indicate that the complexes exhibit higher activity than the free ligands.

Impact of Thiocyanate on Catalytic Abilities of Metal Complexes of 4-N-(4-hydroxy-3-((piperidin-1-yl)methyl) phenyl)acetamide (HL). X-ray Crystal Structure of HL

“…Evidence to support the involvement of the amine nitrogen atom is the lowering by ~ 22 -124 cm -1 the stretching frequency of the bond (C-N) in the Mannich base at 1149 cm -1 . This led to the appearance of broad bands for νC-N in all the metal complexes and most noticeable in the case of 2; this further suggests bonding of the N-atom to the central metal [25,26]. Complex 3 seemed to be a big beneficiary of complexation owing to the strengthening of its νC-O and least reduction in the νC-N. https://doi.org /10.37358/Rev.Chim.1949 Rev.…”

Diperoxo Complexes of Vanadium(V) Containing Mannich Base Ligands

“…[3][4][5][6][7][8][9][10] They are widely used in stoichiometric as well as catalytic oxidation in organic and biochemistry, 11 for example, in the oxidation of thioanisole, 12,13 methylbenzenes, 14 tertiary amines, alkenes, alcohols, 15,16 bromide 17 and also in olefin epoxidations. [18][19][20][21][22] There has been a continuous upsurge in interest in peroxo compounds of vanadium since it has been demonstrated that vanadate and peroxovanadates are capable of inhibiting the hydrolysis of phosphoproteins [23][24][25][26] and exhibit insulin-like properties.…”