Fidan Bahmanova | Baku State University (original) (raw)

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Papers by Fidan Bahmanova

CCDC 1056694: Experimental Crystal Structure Determination

An entry from the Cambridge Structural Database, the world's repository for small molecule cr... more An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

CCDC 921109: Experimental Crystal Structure Determination

CCDC 810833: Experimental Crystal Structure Determination

Concentration of thorium(IV) by a chelating sorbent

PROCEEDINGS OF UNIVERSITIES APPLIED CHEMISTRY AND BIOTECHNOLOGY, 2019

Polyhedron, 2015

The new uranyl, nickel and cobalt complexes, [UO 2 (L 1) 2 (R)] (1), [Ni(L 1) 2 ((CH 3) 2 S@O) 2 ... more The new uranyl, nickel and cobalt complexes, [UO 2 (L 1) 2 (R)] (1), [Ni(L 1) 2 ((CH 3) 2 S@O) 2 ] (2), [Co(H 2 O) 4 (HL 2) 2 ]Á2H 2 O (3) and [UO 2 (H 2 O) 2 (HL 2) 2 ]Á2H 2 O (4), were prepared by reaction of UO 2 (CH 3 COO) 2 Á2H 2 O, Ni(CH 3 COO) 2 Á4H 2 O or Co(CH 3 COO) 2 Á4H 2 O with 1,3-diphenyl-propane-1,3-dione (H 2 L 1) or 4-(2-(2,4-dioxopentan-3-ylidene)hydrazinyl)benzoic acid (H 2 L 2) in the presence of N,N-diethylnicotinamide (R) (for 1). Complexes 1-4 were characterized by elemental analysis, IR spectroscopy, ESI-MS and single crystal X-ray diffraction technique. In both 1 and 2 the (L 1) À coordinates in a bidentate chelating mode where the UO 2 2+ in 1 exhibits a distorted pentagonal bipyramidal and Ni 2+ in 2 a distorted octahedral geometries. In 3 and 4 a hydrazone moiety containing an intramolecular resonance assisted hydrogen bond, with N-HÁ Á ÁO distances of 2.5469(18) and 2.549(7) Å, respectively, was found in the coordinated ligand (HL 2) À. The supramolecular networks (packing diagrams) of 1-4 are constructed via hydrogen bonding, CH-p or p-p interactions. All the four complexes (1-4) act as a good catalyst towards the diastereoselective nitroaldol (Henry) reaction of aliphatic and aromatic aldehydes with nitroethane in different solvents such as acetonitrile, methanol or water. Complex 3 was found to be efficient catalyst for the Henry reaction in aqueous medium, providing b-nitroalcohols with good yields (68-91%) and diastereoselectivities (syn/anti 77:23-73:27).

CCDC 1056790: Experimental Crystal Structure Determination

Journal of the chemical society of pakistan, 2020

In this paper the results of a study on the extraction and concentration of micro-quantities of u... more In this paper the results of a study on the extraction and concentration of micro-quantities of uranium (VI) with a polymeric chelating sorbent with fragments of N, N and#39;diphenylguanidine is discussed. There was studied a static sorption capacity on K+ ions ((SSC = 9.3 mmol / g) and there were determined the ionization constants of ionogenic groups ( =3.97; =8.47) by potentiometric titration. The optimal conditions of the sorption of elements (pHopt, sorption time - τ, the influence of ionic strength - μ) were determined by the dependence of the sorption capacity (SC, mg/g) on the parameter being studied; the sorption capacity of the sorbent (SC) was determined from the saturation curve constructed under optimal sorption conditions. The maximum degree of extraction of uranium by sorbents is achieved from solutions with pH 5. Sorption equilibrium is achieved within 2 hours of contact of the solution with the sorbent. With an increase in the concentration of the uranyl ion in the ...

Uranyl complex with phenolate–sulphonate and diphenyldiazenecarbohydrazonate ligands

Inorganic Chemistry Communications, 2013

ABSTRACT Reaction of uranyl nitrate hexahydrate with 3-(2-(2,4-dioxopentan-3-ylidene)hydrazinyl)-... more ABSTRACT Reaction of uranyl nitrate hexahydrate with 3-(2-(2,4-dioxopentan-3-ylidene)hydrazinyl)-2-hydroxybenzenesulfonic acid (H3L) and bis((E)-phenyldiazenyl)methanone (bpm) yields mononuclear zwitterionic uranyl complex, [UO2(HL)(bpm)(H2O)(2)]center dot 3H(2)O (1), which was characterized by IR, ESI-MS spectroscopies, and elemental and X-ray single-crystal analyses. In 1, the uranium center is in distorted pentagonal bipyramidal geometry with HL2- and bpm ligands coordinated in equatorial plane. The coordination to uranyl and intramolecular hydrogen bonding assist the tautomerization of bpm and formation of zwitterion. Crown Copyright

CCDC 876330: Experimental Crystal Structure Determination

thorium(IV), sorbent, sorption, desorption, clay

Vestnik of Astrakhan State Technical University

The article considers the danger of thorium due to its radioactive toxicity. There has been prove... more The article considers the danger of thorium due to its radioactive toxicity. There has been proved the diversity of thorium compounds and the influence of thorium on a human body and the environment. A polymer chelating sorbent containing fragments of 4-amino - thiouracil has been investigated. An isotherm of thorium sorption with the sorbent is constructed and the optimal concentration conditions are determined: pH = 4; = 6 • 10–3 mol/l; Vob = 25 ml; msorb = 0.03 g; sorptive capacity (CE) = 1 163 mg/g. The degree of extraction of thorium(IV) ions under optimal conditions exceeds 95%. The developed technique was applied to extract thorium from clay. Studying sorption was carried out under static conditions using special equipment.