62984-51-4Relevant academic research and scientific papers
New oxovanadium and dioxomolybdenum complexes as catalysts for sulfoxidation: experimental and theoretical investigations of E and Z isomers of ONO tridentate Schiff base ligand
Kargar, Hadi,Moghimi, Atefeh,Fallah-Mehrjardi, Mehdi,Behjatmanesh-Ardakani, Reza,Rudbari, Hadi Amiri,Munawar, Khurram Shahzad
, p. 22 - 36 (2022)
A new ONO-tridentate Schiff base ligand (H2L) derived by the condensation of nicotinic hydrazide with 5-chlorosalicylaldehyde has been prepared and characterized by combustion analysis (CHN), FT-IR and multinuclear (1H and 13C) NMR spectroscopy. The crystalline nature and molecular structure of the ligand were confirmed by single-crystal X-ray diffraction analysis. Furthermore, the optimized structural parameters of the four possible configurations of the ligand including Z and E stereoisomers each containing two tautomeric forms (enol and keto) have also been investigated. The theoretical parameters were calculated by performing the DFT method using the B3LYP/Def2-TZVP level of theory. In addition to this, dioxomolybdenum(VI) (MoO2L) and oxovanadium(V) (VOL) complexes with the entitled Schiff base ligand have also been prepared and characterized by different techniques. Then, the catalytic efficiencies of synthesized VOL and MoO2L complexes were also explored for the oxidation of sulfides using 30% aqueous H2O2 as a source of oxygen. These homogeneous catalysts showed excellent catalytic activities in the oxidation of both aromatic and aliphatic sulfides.
Structural and biological activity study of (E)-N’-(5-chloro-2-hydroxybenzylidene)nicotinohydrazide) [H2L] and some of its divalent metal complexes
Olurotimi, Ogunniran Kehinde,Adeyemi, Adekoya Joseph,Agbeke, Bamgboye Omolara,Olajumoke, Ojo,Oluwasegun, Siyanbola Tolutope,Sunday, Ezenkeanyi Godfery
, p. 1623 - 1635 (2017/10/27)
Nicotinic acid hydrazide and 2-hydroxyl-5-chlorobenzaldehyde were condensed at 80oC to form an ONO coordination pattern ligand (H2L). The structure of the ligand was elucidated by using 1H NMR, 13C NMR, COSY, HSQC, CHN ana
