Sinteza i karakterizacija facijalnog i meridijalnog izomera uns-cis-(etilendiamin-N,N’-di-3-propionato)(S-arginin)kobalt(III)-hlorida dihidrata

Both theoretically possible geometrical isomers, facial and meridional, of uns-cis-(ethylenediamine-N,N'-di-3-propionato)(S-arginine)cobalt(III) chloride dihydrate were prepared by the reaction of sodium uns-cis-(ethylenediamine-N,N'-di-3-propionato)(carbonato)cobaltate(III) with S-arginine at 75 degreesC. The complexes were isolated chromatographically and characterized by elemental analysis as well as electron absorption and infrared spectroscopy.Oba teorijski moguća geometrjiska izomera, facijalni i meridijalni uns-cis-(etilendiamin- N,N’-di-3-propionato)(S-arginin)-kobalt(III)-hlorida dihidrata su dobijena reakcijom natrijum-uns-cis-(etilendiamin-N,N'-di-3-propionato)karbonatokobaltata(III) sa S-argininom na temperaturi 75 ºC. Kompleksi su izolovani hromatografski i okarakterisani elementarnom analizom, elektronskom apsorpcionom i infracrvenom spektroskopijom

Sinteza i karakterizacija meridijalnog izomera uns-cis-(etilendiamin-N-N'-di-propionato)(S-norleucinato)kobalt(III) hemihidrata

The meridional geometrical isomer of uns-cis-(ethylenediamine-N-N'-di-3-propionato)(S-norleucinato)cobalt(III) complex has been prepared by the reaction of sodium uns-cis-(ethylenediamine-N-N'-di-3-propionato)(carbonato)cobaltate(III) with S-norleucine at 75 degrees C. The complex was isolated choromatographically and characterized by elemental analyses, electron absorption and infrared spectroscopy.Sintetisan je i okarakterisan meridijalni izomer uns-cis-(etilendiamin-N-N'-di-3-propionato)(S-norleucinato)kobalt(III) hemihidrat. Kompleks je dobiven reakcijom natrijum-uns-cis-(etilendiamin-N-N'-di-3-propionato)kobaltata(III) dihidratai S-norleucina na 75 ºC. Kompleks je izolovan hromatografski i okarakterisan elementalnom analizom, elektronsko-apsorpcionom i infracrvenom spektroskopijom

Sinteza i karakterizacija uns-cis-(etilendiamin-N,N'-di-3-propionato) (N-alkiletilendiamin) kobalt(III) kompleksa

Three octahedral cobalt(III) complexes of the general formula uns-cis-[Co(eddp)(R-en)]Cl . H2O, where eddp = the tetradentate ONNO-type ligand ethylenediamine-N,N'-di-3-propionate and R-en = a bidentate NN-type ligand, either N-methyl, N-ethyl or N-iso-propylethylenediamine. The complexes were prepared by the reaction of sodium uns-cis-(ethylenediamine-N,N'-di-3-propionato)(carbonato)cobalt(III)dihydrate with the corresponding diamine. They were isolated chromatographically and characterized by elemental analysis, infrared and electronic absorption spectroscopy.U ovom radu su sintetisana i okarakterisana tri oktaedarska kobalt(III) kompleksa opšte formule uns-cis-[Co(eddp) (R-en)]Cl∙2H2O, gde je eddp tetradentatni ONNO- tip liganda etilendiamin-N,N'-di-3-propionat, a R-en bidentatni NN ligand, N-metil, N-etil ili N-izopropiletilendidamin. Kompleksi su sintetisani polazeći od uns-cis- natrijum(etilendiamin-N,N'-di-3-propionato)(karbonato)kobaltat(III)-dihidrata i odgovarajućih diamina, izolovani hromatografski i okarakterisani elementalnom analizom, infracrvenom i elektronsko-apsorpcionom spektroskopijom

EMC Measurement with GTEM Cell

Nowadays, electromagnetic compatibility plays an increasingly important role in the development of a new equipment. When developing, one should not only pay attention to how noisy is the equipment itself, but also how immune it is to the noise coming from the surroundings. The purpose of this article is to present an instrument used in EMC measurement on a training model and then to evaluate the measured results according to the given standards. During the course of the test, a panel designed for training by Texas Instruments was used coupled with a measuring receiver and a GTEM cell. The obtained results clearly showed the advantages and disadvantages of the cell construction compared to other EMC measurement procedures

Supplementary data for article: Poljarević, J.; Grgurić-Šipka, S.; Kaluđerović, G. N.; Sabo, T. Dibromido[(S,S)-Ethylenediamine-N,N ’-Di-2-(3-Cyclohexyl)Propanoato]Platinum(IV): Synthesis, Characterization, and DFT Calculations. Journal of Coordination Chemistry 2011, 64 (6), 1016–1022. https://doi.org/10.1080/00958972.2011.560940

Supplementary material for: [https://doi.org/10.1080/00958972.2011.560940]Related to published version: [http://cherry.chem.bg.ac.rs/handle/123456789/1160

Pretkoncentracija mikroelemenata iz vode koristeći 4-morfolin ditiokarbamat

The optimum conditions were found for the preconcentration of trace metals in natural waters and model samples with standard metals concentrations by using 4-morpholine dithiocarbamate. The formed complexes were extracted with chloroform. Different methods for recovering the metals from the organic solvent were studied and compared before AAS metal analysis. The developed preconcentration method was successfully applied to the determination of trace metals concentrations in water samples from the "Barje" lake (Leskovac. Yugoslavia).Nađeni su optimalni uslovi za pretkoncentraciju mikroelemenata iz vode koristeći 4-morfolin ditiokarbamat kao kompleksirajući agens. Nagrađeni kompleksi su ekstrahovani hloroformom. Upoređeni su različiti načini ekstrakcije metalnih jona iz organskog rastvarača pre analize atomskom apsorpcionom spektrofotometrijom. Razvijena metoda za pretkoncentraciju uspešno je primenjena za analizu uzoraka vode jezera Barje (Leskovac Jugoslavija)

Electrochemical properties of some gold(III) complexes with (S,S)-R(2)edda-type ligands

Oxidation-reduction properties of eleven gold(III) complexes with (S,S)-R(2)edda-type ligands was studied by cyclic and differential pulse voltammetry in DMSO. Series I: [AuCl2{(S,S)-R(2)eddip}]PF6, (S,S)-eddip = (S,S)-ethylenediamine-N,N'-di-2-propanoate, R = n-butyl, n-pentyl, isobutyl, isoamyl, cyclopentyl, 1-5; II: [AuCl2{(S,S)-R(2)eddch}]PF6, (S,S)-eddch = (S,S)-ethylenediamine-N,N'-di-2-(3-cyclohexyl)propanoate, R = methyl, ethyl, n-propyl, n-butyl, isobutyl, isoamyl, 6-11. Voltammograms in DMSO showed two successive irreversible reduction steps, where Au-I species were the final reduction product. Reduction potential values are in range from 116 to 156 mV (Ep(1)) and -520 to -572 mV (Ep(2)) for Series I and from 148 to 228 mV (Ep(1)) and -569 to -638 mV (Ep(2)) for Series II. In general, slightly easier reduction of complexes belonging to Series I (higher cytotoxicity) could be due to less steric hindrance around the gold center. Reduction potentials and anticancer activity are not in correlation

Kompleksi paladijuma(II) sa ligandima R2edda tipa, deo III - diizobutil-(s,s)-2,2'-(1,2,-etandiildiimino)-di(4-metilpentanoat)-dihidrohlorid i njegov kompleks sa paladijumom(II) - sinteza i karakterizacija

A new R(2)edda-type ester, diisobutyl (SS)-2,2'-(1,2-ethane-diyldiimino)di(4-methylpentanoate) dihydrochloride, [(S,S)-H(2)iBu(2)eddl]Cl-2, 1, and its palladium(II) complex, dichloro(diisobutyl (SS)-2,2'-(1,2-ethanediyldiimino)di(4-methylpentanoate))palladium(II), [PdCl2{(S,S)-iBu(2)eddl}], 2, were synthesized and characterized by elemental analysis, as well as IR and NMR spectroscopy. It was found that complex 2 was obtained as mixture of two diastereoisomers, observed in NMR spectra. The crystal structure of compound I was determined by X-ray diffraction studies and is described. The isolated crystals consisted of one dicationic species [(SS)-H(2)iBu(2)eddl](2+) and two Cl-. The crystal system was tetragonal with the space group P4(2). Hydrogen bonds significant for the manner of packing are N-H1N center dot center dot center dot Cl, 3.049(3) angstrom, 159(3)degrees and N-H2N center dot center dot center dot Cl, 3.100(3) angstrom, 164(3)degrees. An infinite chain was formed building a one layer structure, usual for these types of compounds. The C-2 symmetry axis of the compound passes through the Cl-Cl-i bond vector and lies perpendicular to the plane N2Cl2.Novi estar R2edda-tipa diizobutil-(S,S)-2,2'-(1,2-etandiildiimino)-di(4-metilpen-tanoat)-dihidrohlorid [(S,S)-H2iBu2eddl]Cl2,1, i njegov kompleks paladijuma(II), dihlorodiizobutil-(S,S)-2,2'-(1,2-etandiildiimino)-di(4-metilpentanoat)-paladijum(II) [PdCl2{(S,S)-iBu2eddl}], 2, sintetisani su i okarakterisani uz pomoć elementalne analize, IR i NMR spektroskopije. Nađeno je da je kompleks 2 dobijen kao smeša dva dijastereoizomera, što je primećeno u NMR spektrima. Kristalna struktura 1 je rešena i opisana. Izolovani kristali se sastoje iz jedne dikatjonske vrste [(S,S)-H2iBu2eddl]2+ i dva Cl-. Kristalni sistem je tetragonalan sa prostornim grupom P42. Značajne vodonične veze za način pakovanja su N-H1N•••Cl, 3,049(3) Å, 159(3)°i N-H2N...Cl, 3,100(3) Å, 164(3)°. Time se formira beskonačan lanac i jednoslojna struktura, koji su uobičajeni za ove tipove struktura. Osa simetrije C2 jedinjenja prolazi kroz C1-C1i vektor veze i leži normalno na N2Cl2 ravan. PR Projekat Ministarstva nauke Republike Srbije, br. 142010

(S,S)-N,N '-Bis(1-carboxy-2-methylpropyl)ethylenediammonium dihalide cyclopentanol tetrasolvate (halide = bromide/chloride similar or equal to 1:12)

In the crystal structure of the title compound, C(12)H(26)N(2)O(4)(2+)center dot-2(Br(0.085)Cl(0.915))(-)center dot 4C(5)H(9)OH, the complete cation is generated by crystallographic twofold symmetry. Contamination of the chloride counter-anion with bromide occured during the preparation, due to the use of 1,2-dibromoethane. One of the solvent molecules is disordered, with occupancies 0.53 (3): 0.47 (3). The crystal packing is stabilized by an infinite two dimensional center dot center dot center dot X center dot center dot center dot H-N-H center dot center dot center dot X center dot center dot center dot hydrogen-bonding network (X: Br(-)/Cl(-) similar or equal to 1:12). In addition, O-H center dot center dot center dot X and O-H center dot center dot center dot O hydrogen bonds involving solvent molecules are observed

Sinteza i karakterizacija tris [butil-(1-metil-3-fenil-propil)-ditiokarbamato]-kobalt(III) seskvitoluena

A new bidentate ligand butyl-(1-methyl-3-phenyl-propyl)-dithiocarbamate (bmPhipdtc) was prepared, as the sodium salt. In the reaction of hexaaminecobalt(III) chloride with NabmPhipdtc, the corresponding tris[butyl-(1-methyl-3-phenyl-propyl)-dithiocarbamato]cobalt(III), [Co(bmPhipdtc)(3)] complex was prepared. The complex was characterized by elemental analysis, infrared, electronic absorption, H-1 and C-13-NMR spectroscopy.Sintetisan je novi bidentatni ligand butil-(1-metil-3-fenil-propil)-ditiokarbamat (bmΦpdtc), kao natrijumova so. Reakcijom heksaamminkobalt(III)-hlorida i navedenog liganda dobijen je odgovarajući kompleks tris[butil-(1-metil-3-fenil-propil) ditiokarbamato]kobalt(III), [Co(bmΦpdtc)3]. Kompleks je okarakterisan elementalnom analizom, infracrvenim, elektronsko-apsorpcionim, 1H i 13C-NMR spektrima