13395-16-9Relevant articles and documents
Oxidation of metallic copper with complexones in organic media
Klimov,Davydova,Buzaeva,Dubrovina,Kalyukova
, p. 1657 - 1659 (2010)
Direct oxidation of copper in organic media with complexones (sterically hindered o-quinones; acetylacetone and pyridine as stabilizing ligands) was studied. From the complexes obtained, the initial components can be regenerated.
Synthesis, structure and reactivity of schiff base transition metal mixed ligand complexes derived from isatin and salal
Sridevis,Girija,Satish
, p. 169 - 176 (2021/03/29)
A series of Isatin derivative Schiff base ligands have been prepared by the nucleophilic addition of 5-Bromo isatin with various amine derivatives and characterized by CHNS analysis and spectral data. Similarly, two of salicylaldehyde ligand have been prepared by the nucleophilic addition of Salal with amine derivatives. In order to investigate the coordination behavior of these ligands and their metal complexes of the type M(acac)x, L [M = Cu(II), Ni(II); L = Schiff base ligands; x = 0 or 2] mixed ligand (chelate) have been prepared from the reaction of these ligands with their corresponding metal (Ni, Cu) acetylacetonates. The present paper was an approach to understand the chelating mixed ligand formation in complexes. All the isolated Shiff base ligands and mixed acac metal complexes were characterized by using IR, 1H NMR, UV-Vis, molar conductance and TGA/DTA analysis. The biological activities of all the isolated ligands and their corresponding mixed acac metal complexes have been used to screening against the microorganisms both Gram-positive and Gram-negative bacteria such as E.coli and S.sureus respectively, fungi A. niger and C.albicans and the results have been compared with standard and control. The main idea of these types of biological screening is to understand the role of these isolated compounds in pharmaceutical industries for drug development.
Reaction of the framework 3d-organometallosiloxanes with acetylacetone
Sergienko,Cherkun,Myakushev,Korlyukov,Zavin
, p. 1369 - 1375 (2011/04/16)
A reaction of acetylacetone with the framework sandwich-type metallosiloxanes (MOS) of general formula [PhSiO2]6M 6[PhSiO2]6, where M = Cu, Ni, Mn, was studied by GPC, 1H and 29Si NMR spectroscopy, X-ray diffraction, elemental and functional analysis. The reaction involved replacement of the metal atoms with the hydrogen atoms and is accompanied by the formation of the corresponding chelate complexes M(acac)2. Displacement of the metal from the framework MOS leads to the destruction of molecular skeleton and formation of phenylsiloxanes containing Si-OH groups. The yield and composition of the reaction products considerably depend on the nature of the metal in [PhSiO2]6M6[ThSiO2]6. A selective substitution of the metal leads to the stereoregular hexahydroxyhexaphenylcyclohexasiloxane, [PhSiO(PH)]6, cis-isomer. The structure and composition of the crystalline hexahydroxyhexaphenylcyclohexasiloxane obtained were confirmed by 29Si NMR spectroscopy, X-ray diffraction study, and functional analysis, while its TMS derivative was studied with 1H NMR spectroscopy and GPC. Using a framework manganese phenylsiloxane as an example, a reversible character of the process has been established and an alternative synthesis of this compound from hexahydroxyhexaphenylcyclohexasiloxane and Mn(acac)2 has been accomplished for the first time.
