The present work describes the crystal structure and Hirshfeld surface analysis of a transition metal coordination complex, bis (2-(2-(1H-benzo[d]imidazol-2-yl)hydrazono)propan-1-ol) nickel(II) chloride.Recrystallization of the title complex from aqueous methanol has crystallized the complex in ...
A microbial screen identified the yeast Candida sorbophila MY 1833 as a suitable biocatalyst for the asymmetric bioreduction of a ketone (2-(4-nitro-phenyl)-N-(2-oxo-2-pyridin-3-yl-ethyl)-acetamide) to its corresponding (R) alcohol [(R)-N-(2-hydroxy-2-pyridin-3-yl-ethyl)-2-(4-nitro-phenyl)-aceta...
Syntheses of 5-nitro-2-(2-phenylhydrazinyl)pyridine (5-nitro-2-phenylhydrazopyridine), 3-methyl-5-nitro-2-(2-phenylhydrazinyl)pyridine (3-methyl-5-nitro-2-phenylhydrazopyridine), 4-methyl-5-nitro-2-(2-phenylhydrazinyl)pyridine (4-methyl-5-nitro-2-phenylhydrazopyridine) and 6-methyl-5-nitro-2-(2-...
3-Nitro-2-phenyl-2H-chromene (7) is reported to undergo a novel high-yield photoreaction in methanol to give 3-hydroximino-4,4-dimethoxy-2-phenylchroman (8).
The reaction of 3-nitro-2-trifluoro(trichloro)methyl- and 3-nitro-2-phenyl-2H-chromenes with 1-morpholinocyclopentene under the conditions of kinetic or thermodynamic control led to the formation of products due to enamine addition at the C-4 atom of chromene as individual cis,trans- or trans,tr...
Cobalt substituted mesoporous SBA-16 catalysts, made by post grafting technique using directly cobalt acetylacetonate as the precursor was prepared. High loading of cobalt finely dispersed on SBA-16 silica was obtained. The Co/SBA-16 catalysts exhibited high conversion and selectivity in epoxida...
Binary diffusion coefficients, D12, of the metal acetylacetonates, palladium(II) acetylacetonate and cobalt(III) acetylacetonate, were measured from 308.2 to 343.2 K over the pressure range from 9 to 40 MPa at infinite dilution in supercritical carbon dioxide using the chromatographic impulse re...
The modification of surface properties of isotactic polypropylene (it.PP) has attracted much attention in fundamental science and industrial applications. Primer treatment is a promising methods that is employed to overcome the poor adhesive property of it.PP. In this study, we examined the prim...
The reaction between [M(acac)3] (M = Fe, Co, acac = acetylacetonate) and the diamino-bis(phenol) pro-ligands (2-OH-3,5-tBu2-C6H2CH2)2NCH2(2-NC5H4) (H21) and (2-OH-5-tBu-C6H3CH2)2NCH2CH2CH2N(CH3)2 (H22) afforded the [κ4-(N2,O2)M(acac)] complexes [Fe(1)(acac)] (3), [Fe(2)(acac)] (4), [Co(1)(acac)...
The sulfoxides of penicillin derivatives are important pharmaceutical intermediates and can be prepared by air oxidation of corresponding sulfides catalyzed by cobalt(III) acetylacetonate (Co(acac)3). However, when using the homogeneous catalyst, it is very difficult to separate the catalyst fro...
The reaction between cobalt(III) acetylacetonate and trimethylaluminium at a molar ratio of Me3Al/Co(acac)3 of 1/1 has been investigated. When a benzene solution of trimethylaluminium was added to a benzene solution of cobalt (III) acetylacetonate, IR spectra and volumetric gas analysis show tha...
Mixed-matrix membranes containing a porous organic framework (SNW-1 nanoparticles) and a cobalt-based complex (Co(acac)3) were fabricated using the solution-casting technique for potential applications in O2/N2 separation. The mixed-matrix membranes did not show any appreciable defects. In the f...
Adsorption equilibria of cobalt (III) acetylacetonate (Co(acac)3) in the presence of supercritical carbon dioxide (scCO2) with methanol co-solvent on MCM-41 mesoporous silica were studied at 313–353 K and 12.5–20.0 MPa from experimental and model calculation viewpoints. The measured data indic...
The corrosion characteristics of copper microparticles and copper nanoparticles in distilled water were investigated in this paper. The Cu2+ transformations of copper microparticles and copper nanoparticles in distilled water were tested by using absorbance measurement, the structures of their c...
SummaryWheat seedlings (Triticum durum Desf.) were incubated in a solution containing 100 μM CuSO4 for increasing time ranging from 1 min to 6 h. Copper rapidly accumulated into the roots, and its amount increased significantly until 360 min. During the experiment, copper did not cause any lipi...
A modification of the Vasak and Sedivec method for the spectrophotometric determination of arsenic using borohydride as reducer was proposed. The absorption spectrum, fulfilment of Beer's Law, interval of application, and reproducibility of the method were all examined. Statistical and econ...
The reagent diethyldithiocarbamic acid has been examined for the high-performance liquid chromatographic separation of cobalt(II) and nickel(II) chelates on reversed-phase HPLC columns (150 × 3.9 mm) packed with Nova-Pak C18, 4 μm. The metal-diethyldithiocarbamic chelates were preconcentrated ...
Our research group have been contributing to the development of speciation analytical techniques with the elaboration of various chromium speciation methods since 1990. In the past period 20 divers techniques have been developed for the separation, enrichment and determination of toxic chromium ...
A single-metal redox flow battery employing chromium(III) acetylacetonate in tetraethylammonium tetrafluoroborate and acetonitrile has been investigated using electrochemical techniques. Cyclic voltammetry was used to evaluate electrode kinetics. Four redox couples were observed in the stable po...
In the relaxation process from the 4T2g state of chromium(III) acetylacetonate, CrIII(acac)3, ultrafast intersystem crossing (ISC) competes with vibrational relaxation (VR). This contradicts the conventional cascade model, where ISC rates are slower than VR ones. We hence investigate the relaxat...
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