1237-69-0Relevant academic research and scientific papers
Synthesis, spectral investigation of Ni(II) schiff base complexes: Antimicrobial activities and catalytic oxidation of alcohols
Madaselvi,Padma Priya,Jeyaraj,Arun Paul,Kalaivani,Shahul Meeran,Arunachalam
, p. 1682 - 1686 (2016/07/06)
Air stable Ni(II) Schiff base complexes viz. [Ni(L1)(PPh3)] and [Ni(L2)(PPh3)] [where L1 and L2 are dianions of Schiff base ligands, respectively] have been synthesized and characterized by analytical and spectral (electronic, FT-IR, 1H, 13C and 31P NMR) methods. The assignment of all the aromatic carbon-hydrogen resonances is made on the basis of 1H-13C HSQC spectrum of the complexes. The Schiff base ligands behave as a bibasic tridentate ligands and bonded through ONO and ONS mode. A square planar structure has been proposed on the basis of spectral data. Novel Ni(II) Schiff base complexes exhibited good antimicrobial activity towards the strains Staphylococcus epidermidis and Escherichia coli. Thermal and air stability of the complexes offer the advantage of oxidation of alcohols.
Oxidized single-walled carbon nanotubes (swcns-cooh) as a new catalyst for the protection of carbonyl groups as hydrazones
Borazjani, Maryam Kiani,Safaei, Hamid Reza,Panahandeh, Majid,Kiani, Ali Reza,Kiani, Masoumeh,Mofarahi, Masoud
, p. 279 - 281 (2013/12/04)
Nano-materials are considered as suitable heterogeneous catalysts for many organic reactions. Herein oxidized carbon nanotube (SWCNTs-COOH) has been reported as a heterogeneous catalyst, for protection of carbonyl groups as hydrazones in EtOH at 80 C. The reactions proceed smoothly with good to excellent yields, and the SWCNTs-COOH used can be recycled.
Facile preparation and reactivity of bifunctional ionic liquid-supported hypervalent iodine reagent: A convenient recyclable reagent for catalytic oxidation
Zhu, Chenjie,Yoshimura, Akira,Wei, Yunyang,Nemykin, Victor N.,Zhdankin, Viktor V.
supporting information; experimental part, p. 1438 - 1444 (2012/04/04)
Novel, efficient, and recyclable bifunctional catalysts bearing ionic liquid supported (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO) and iodoarene moieties were developed and used for environmentally benign catalytic oxidation of alcohols. The reactions using peracetic acid as a green and practical co-oxidant afforded the corresponding carbonyl compounds in high yields under mild conditions and convenient work-up. Furthermore, these ionic liquid supported bifunctional catalysts could be simply recovered and reused.
Fe (III) complexes of a bis-benzimidazolyl diamide ligand: Spectral and Catalytic studies
Ahuja, Gauri,Mathur, Pavan
body text, p. 180 - 186 (2011/12/22)
A new tetradentate bis benzimidaozlyl diamide ligand N,N′-Bis (benzimidazol-2-yl-methyl)-hexane-1,6-dicarboxamide (GBSA) has been synthesized and utilized to prepare new Fe(III) complexes with exogenous anionic ligand X = Cl- and NO3-. Isomer shift values are in the range found for Iron in the +3 oxidation state while Quadrupole Splitting indicates large distortion from a six coordinate geometry, a finding supported by low temperature EPR work. The E1/2 values are found to be quite cathodic indicating stability of the Iron (III) complexes. The oxidation of alcohols was investigated using [Fe(GBSA)Cl3] as the catalyst with TBHP as an alternate source of oxygen. The respective carbonyl products have been isolated and characterized by 1H NMR, electronic spectroscopy, mass and IR spectral studies.
Synthesis, characterization, redox, catalytic, and antibacterial activities of binuclear ruthenium(III) schiff base complexes containing triphenylphosphine as co-ligand
Manimaran, Arumugam,Jayabalakrishnan, Chinnasamy
experimental part, p. 116 - 128 (2010/08/13)
New hexa-coordinated binuclear Ru(III) Schiff base complexes of the type [(PPh3)2X2Ru]2L (where, X = Cl or Br; L = binucleating N2O2 Schiff bases) have been synthesized and characterized by elemental analysis, magnetic susceptibility measurement, FT-IR, UV-vis, 13C1H-NMR, ESR, cyclic voltammetric, SEM and powder X-ray diffraction pattern. The new complexes have been used as catalyst in C C coupling reaction and the oxidation of alcohols to their corresponding carbonyl compounds by using molecular oxygen atmosphere at ambient temperature. Further, the new Schiff base ligands and their Ru(III) complexes were also screened for their antibacterial activity against K. pneumoniae, Shigella sp., M. luteus, E. coli and S. typhi. From this study, it was found out that the activity of the ruthenium(III) Schiff base complexes almost reaches the effectiveness of the conventional bacteriocide standards. Copyright Taylor & Francis Group, LLC.
Dowex polymer-mediated protection of carbonyl groups
Niknam, Khodabakhsh,Kiasat, Ali Reza,Karimi, Sadegh
, p. 2231 - 2236 (2007/10/03)
Dowex (strongly acidic cationic exchange resin) polymer is employed as solid acid catalyst for the clean and less hazardous protection of carbonyl compounds as phenylhydrazones and 2,4-dintrophenylhydrazones in ethanol under reflux conditions. The reactions proceed very smoothly and the yields of the derivatives are excellent. Copyright Taylor & Francis, Inc.
Preparation and Absorption Spectra of Arylhydrazones from α,β-Unsaturated Carbonyl Compounds
Hearn, Michael J.,Lebold, Suzanne A.,Sinha, Anvita,Sy, Karen
, p. 4188 - 4193 (2007/10/02)
Substituted arylhydrazones 2-17, 19, and 23-29 were prepared from several α,β-unsaturated carbonyl compounds and their absorption spectra examined.The dependence on concentration of certain near-infrared bands of the spectra has been associated with aggregation and appears to correlate with structural elements of the compounds in a way suggesting significant intermolecular effects, either hydrogen bonding or charge transfer of both.
