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1

Simultaneous removal of phenol and Cu(II) from wastewater by tallow dihydroxyethyl betaine modified bentonite

Hu Xiangyang, Wang Bao, Yan Gengsheng, Ge Bizhou

Archives of Environmental Protection

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2022

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Vol. 48, no. 3

37--47

EN

An organobentonite modified with an amphoteric surfactant, tallow dihydroxyethyl betaine (TDHEB), was used as an adsorbent to simultaneously remove Cu(II) and phenol from wastewater. The characteristic of the organobentonite (named TDHEB-bentonite) was analyzed by X-ray diffraction, Fourier-transform infrared spectra and nitrogen adsorption-desorption isotherm. Batch tests were conducted to evaluate the adsorption capacities of TDHEB-bentonite for the two contaminants. Experiment results demonstrated that the adsorption of both contaminants is highly pH-dependent under acidic conditions. TDHEB-bentonite had about 2.0 and 5.0 times higher adsorption capacity toward Cu(II) and phenol, respectively, relative to the corresponding raw Na-bentonite. Adsorption isotherm data showed that the adsorption processes of both contaminants were well described by Freundlich model. Kinetic experiment demonstrated that both contaminants adsorption processes correlated well with pseudo-second-order model. Cu(II) had a negative impact on phenol adsorption, but not vice versa. Cu(II) was removed mainly through chelating with the organic groups (-CH2CH2OH and -COO-) of TDHEB. Otherwise, partition into the organic phase derived from the adsorbed surfactant was the primarily mechanism for phenol removal. Overall, TDHEB-bentonite was a promising adsorbent for removing Cu(II) and phenol simultaneously from wastewater.

2

Reactivity of nZVI in the removal of Cu(II) and Zn(II) from synthetic mine drainage

Suponik Tomasz, Neculita Carmen Mihaela

Environment Protection Engineering

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2021

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Vol. 47, nr 2

93--108

EN

Adsorption properties, including isotherms and kinetics, of nano zero-valent iron (nZVI) for Cu(II) and Zn(II) removal from synthetic mine drainage were evaluated in batch tests. The influence of contact time, nZVI doses, pH, ionic strength, temperature, and concentration on nZVI adsorption properties was assessed. The removal of Cu(II) and Zn(II) increased with pH from 3 to 7 and then stabilized up to pH 10. Moreover, the increased Cu(II) adsorption capacity upon increasing temperature and a positive enthalpy change (ΔH) indicate that the adsorption process is endothermic. The results also showed that the adsorption equilibrium for Cu(II) and Zn(II) was achieved after 50 and 30 min, respectively. Kinetics were best described by a pseudo-nth order model, with the order of sorption of 2.231 and 1.363, and the rate constants of 0.0008 and 0.0679 mg1-n·gn-1/min, for Cu(II) and Zn(II), respectively. The correlation between the amount of metals adsorbed on nZVI surface and the residual amount of metals in water during isothermal tests was best described by the nonlinear Sips model. Using this model, high q maxS were found: 286.6 mg/g and 142.6 mg/g, for Cu(II) and Zn(II), respectively, as indication of their high sorption capacity.

3

Use of synthetic zeolite materials from fly ash to remove copper(II) ions from aqueous solutions

Ulatowska Justyna, Stala Łukasz, Nowakowska Alicja, Polowczyk Izabela

Physicochemical Problems of Mineral Processing

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2020

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Vol. 56, iss. 6

114--124

EN

Water quality and waste management are two chief problems that the modern world is struggling with. Intensified development of the industry not only leads to the production of large amounts of solid waste that must be stored in landfills but can also result in contaminant emissions into the environment. Enormous quantities of ash produced from coal combustion have been a long-term problem of the industry. Literature studies show that fly ash can be used as a material to produce cheap and efficient zeolite-type adsorbents due to abundance of alumina-silicates in their composition. Fly ashes which were processed into zeolites as a result of alkaline hydrothermal treatment were obtained from two power plants in Poland (in Turów and Zgierz). The obtained zeolite materials and raw fly ash samples were characterised in terms of specific surface area, particle size distribution and density. The structure was also investigated using Fourier transform infrared spectroscopy (FTIR) in the mid- infrared wavenumber range. Two raw fly ashes and two zeolite materials were examined for their ability to remove Cu(II) ions from aqueous solutions. The results showed that the amount of adsorbed copper ions by alkaline-modified fly ash was higher than for unmodified fly ash. The ion removal efficiency is high and exceeds 95%.

4

Lignocellulosic fraction of the pericarps of the acorns of Quercus suber and Quercus ilex: isolation, characterization, and biosorption studies in the removal of copper from aqueous solutions

Mébarki Moubarek, Hachem Kadda, Harche Meriem Kaid

Polish Journal of Chemical Technology

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2019

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Vol. 21, nr 3

40--47

EN

Pericarps of Algerian Quercus ilex (Q. ilex) and Quercus suber (Q. suber) were used as copper adsorbents in artifi cially contaminated solutions. Exposing accessible lignocellulosic binding sites enhanced adsorption. The lignocellulosic fractions of Q. suber and Q. ilex (36.47±9.1 and 47.66±9.3, respectively) were characterized by FTIR before and after adsorption. The aim was to identify the functional groups adsorbing Cu(II). SEM/EDX determined lignocellulose surface morphology and composition. The amount of adsorbent-bound Cu(II) increased with initial [Cu(II)]. Cu(II) adsorption range was 23.59–48.06 mg.g–1 for Q. Suber and 22.56–38.19 mg.g–1 for Q. ilex when [Cu(II)] was 100–500 mg.L–1. Adsorption isotherms and Langmuir and Freundlich models of the Q. suber and Q. ilex lignocellulosic fractions indicated natural Cu(II)adsorption capacities (Qmax) of 53.76 mg.g–1 and 36.06 mg.g–1 and KF of 5.9 mg.g–1 and 7.43 mg.g–1, respectively.

5

Otrzymywanie, spektroskopia i biologiczna aktywność kompleksów Cu(II) i Zn(II) z pochodnymi 1,3,4-tiadiazolu

Karcz D., Starzak K., Matwijczuk A., Ciszkowicz E., Lecka-Szlachta K., Matwijczuk A., Ciupak A., Gładyszewska B., Niewiadomy A.

Przemysł Chemiczny

|

2018

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T. 97, nr 7

1095--1101

PL

Stosując łagodne warunki reakcji, otrzymano dwa nowe kompleksy Cu(II) i Zn(II) z ligandem wyselekcjonowanym z pochodnych 1,3,4-tiadiazolu. Wszystkie substancje scharakteryzowano z zastosowaniem metod spektroskopowych i oszacowano zakres ich aktywności biologicznej poprzez wyznaczenie potencjału przeciwutleniającego i aktywności przeciwbakteryjnej przeciw kilku szczepom bakterii. W porównaniu z uprzednio opisywanymi pochodnymi z tej serii związków otrzymane kompleksy z jonami Cu(II) i Zn(II) charakteryzowały się relatywnie wysoką rozpuszczalnością w roztworach wodnych. Ponadto otrzymane związki wykazały zadowalającą aktywność antyoksydacyjną i umiarkowaną aktywność przeciwbakteryjną.

EN

Two novel Cu(II) and Zn(II) complexes with 1,3,4-thiadiazoles were obtained under mild reaction conditions. The structures of free ligands and the corresponding complexes were characterized by spectroscopic methods. The biol. activity of all compds. was estd. by detn. of their antioxidant and antibacterial activities against bacterial species. The complexes showed relatively high soly. in aq. solns. Both the free ligands and their Cu(II) and Zn(II) complexes exhibited a moderate antioxidant and antibacterial activities.

6

New application of D-π-A molecules as a sensor for recognition of Cu2+ in polluted water

Niu H., Zhu G., Zhu M., Li X.

Environment Protection Engineering

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2017

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Vol. 43, nr 4

67--72

EN

Novel chromophore GZP1 with D-π-A structure was designed and prepared for its application as a sensor for the recognition of Cu2+ ions in polluted water. Reaction of aldimine condensation was used to synthesize chromophore GZP1. Its chemical structure of was characterized by mass spectrum, nuclear magnetic resonance spectroscopy and ultraviolet-visible absorption spectrum. Cu2+ ions were recognized via fluorescence spectra. Chromophore GZP1 showed specific detection ability of Cu2+. 14 other metal ions were used as reference. The detection limit was estimated to be 0.06 μmol/dm3 in aqueous solution, which was significantly lower than the typical concentration of blood Cu2+ in normal individuals and the limit of copper(II) in drinking water.

7

Application of modified maize hull for removal of Cu(II) ions from aqueous solutions

Ghasemi S. M., Mohseni-Bandpei A., Ghaderpoori M., Fakhri Y., Keramati H., Taghavi M., Moradi B., Karimyan K.

Environment Protection Engineering

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2017

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Vol. 43, nr 4

93--103

EN

Discharge of industrial waste containing heavy metals to the environment is a main concern because of their toxicity to many life forms. Adsorption process is one of the conventional methods in order to adsorb heavy metals from wastewater effluents. Therefore, the removal of Cu(II) from aquatic solutions using modified maize hull was investigated. All experiments were performed in batch conditions. The residual Cu(II) concentration was measured by AAS. Upon increasing the adsorbent dosage, pH, and contact time and decreasing Cu(II) concentration, the removal efficiency of Cu(II) ions increased. In optimum conditions, 50% of copper was removed by modified maize hull. The experimental data were best fitted by the Langmuir type 2 model and the adsorption kinetic model followed a pseudo-second order type 1 model. It seems that the use of the modified maize hull to remove Cu(II) ions is very suitable, low-cost, and efficient.

8

Removal of Cu(II) and Pb(II) from aqueous solutions by lactic acid bacteria

Wierzba S.

Proceedings of ECOpole

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2015

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Vol. 9, No. 2

505--512

EN

The aim of the study was to compare the removal of Cu(II) and Pb(II) from aqueous solution by lactic acid bacteria (LAB). Effect of various process parameters, viz., initial metal ions concentration, pH, and contact time has been studied for the removal of copper and lead ions. Langmuir and Freundlich models were applied to describe the biosorption isotherm of the metal ions by LAB biomass. Langmuir model fitted the equilibrium data better than the Freundlich isotherm. The sorbent showed the maximum sorptive capacity amounting to be 11.07 and 10.51 mg · g–1 for Cu(II) and Pb(II) ions, respectively. The optimum conditions were pH 6.0 with equilibrium time of 40 min for both metal ions. The involvement of functional groups on the surface of dried biomass in biosorption process is also discussed.

PL

Celem pracy było porównanie zdolności usuwania Cu(II) i Pb(II) z roztworu wodnego przez bakterie kwasu mlekowego (LAB). Badano wpływ różnych parametrów, tj. stężenia jonów metali, pH i czas kontaktu, na proces usuwania jonów miedzi i ołowiu. Do opisu izoterm adsorpcji jonów metali przez biomasę LAB zastosowano modele Langmuira i Freundlicha. Uzyskane dane doświadczalne były lepiej dopasowane do modelu Langmuira niż Freundlicha. Sorbent wykazał maksymalną zdolność sorpcyjną, wynoszącą 11,07 i 10.51 mg · g–1 odpowiednio dla jonów Cu(II) i Pb(II). Optymalne warunki biosorpcji obu jonów metali wynosiły: pH 6,0 i czas równowagi 40 minut. Omówiono również udział grup funkcyjnych na powierzchni biomasy w procesie biosorpcji.

9

Spectrophotometric determination of copper as copper Piperazine

Kavitha Ch., Babu M. S., Saraswathi K.

International Letters of Chemistry, Physics and Astronomy

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2013

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Vol. 8, iss. 3

205-209

EN

Spectrophotometric method for determination of Cu(II) in the trace quantities was developed by using piperazine as ligand in ammonium acetate medium. The Procedure developed was applied for the estimation Cu(II) in microgram quantities in the samples of alloys and the method was found to be simple, rapid and comparable to routine analytical methods for trace level analysis of metal ions in environmental samples in any laboratory where sophisticated and expensive instruments are not available. UV visible spectrophotometer is cost effective and available in almost all laboratories. The complexes of piperazine in aqueous solutions are not reported so far and this is the first attempt in this area of spectrophotometric analysis.

10

Porównanie przebiegów równolegle zachodzących flotacji jonów cynku i miedzi

Kawalec-Pietrenko B., Konopacka-Łyskawa D., Rybarczyk P.

Inżynieria i Aparatura Chemiczna

|

2011

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Nr 5

50-51

PL

W pracy zbadano wpływ pil oraz stężenia kolektora na efektywność procesów flotacji jonowej i precypitacyjncj zastosowanych do równoległego usuwania jonów cynku Zn(II) i miedzi Cu(II) z rozcieńczonych, kwaśnych i alkalicznych roztworów wodnych. Najwyższe wartości stopnia wyfloto-wania dla obydwu metali odnotowano dla pll = 8,5 + 9,5 przy zastosowaniu SDS jako kolektora. Dla roztworów o pH> 11 zaobserwowano spadek stopnia wyflotowania ze wzrostem stężenia kolektora kationowego oraz wystąpienie czasu indukcji.

EN

An influence of pH and collector concentration on the precipitation and ion flotation efficiency used for removal of Zn(ll), Cu(II) ions from diluted, acidic and alkaline water solutions was tested. The highest values of flotation degree were noted for pH= 8.5 9.5 and for SDS used as a collector. For solutions of pH> 11, it was observed the decrease of flotation degree with the increase of cationic collector concentration and the presence of induction time.

11

Reduction of NO with methane over metal ion-exchanged mordenite

Ćwikła-Bundyra W.

Ars Separatoria Acta

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2011

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No. 8

109-119

EN

This article presents the results of research studies on the possibilities of application of natural zeolite-mordenite for the reduction of nitrogen oxide. Various kinds of metal ions were added to the zeolite samples using the ion-exchange method. The effect of metal contents was shown for the mordenite and related to their catalytic properties. The catalytic properties of Cu-, Co-, Ni- were compared for NO reduction with methane. High nitric oxide conversions were observed for copper and cobalt-mordenite, especially in the temperature range between 400 and 500 C degree. Copper- and cobaltmordenite catalysts showed higher activities and selectivities than catalysts composed of nickel-exchanged mordenite.

12

Study on Coordination and Noncovalent Interactions in Cu(II), L-Aspartic acid and Adenosine-5'-monophosphate Systems

Bregier-Jarzebowska R., Gasowska A., Abd El-Latif S. T.

Polish Journal of Chemistry

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2008

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Vol. 82, nr 11

2057-2065

EN

In the L-aspartic acid (Asp) and adenosine-5c-monophosphate (AMP) systems molecular complexes (Asp)Hx(AMP) are formed as a result of noncovalent dipole-ion interactions between Asp and AMP. Stability constants of particular species has been determined and the interaction centres have been identified as the deprotonated carboxyl groups and the amine group from Asp along with the phosphate group and endocyclic nitrogen atoms from AMP. At pH close to 7 an inversion in the character of the interactions takes place: in an acidic medium the N(1)H group from AMP is a positive reaction centre, while in a basic medium after deprotonation it becomes a negative reaction centre. In the ternary system of Cu(II)/Asp/AMP the formation of protonated complexes of the type Cu(Asp)Hx(AMP), heteroligand complex Cu(Asp)(AMP) and hydroxocomplex Cu(Asp)(AMP)(OH) have been observed to form. The modes of coordination have been established on the basis of the spectroscopic data and equilibrium studies. At low pH the introduction of copper(II) ions to the binary system does not change the sites of intermolecular noncovalent interactions of the bioligands. Start ing from pH near 4, the presence of Cu(II) ions totally eliminates the noncovalent interactions between bioligands observed in the Asp/AMP binary systems.

13

Spectrophotometric initial-rate method for determination of neomycin in ophthalmic drops

Sunaric S. M., Mitic S. S., Miletic G. Z., Kostic D.A., Trutic N. V.

Chemia Analityczna

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2007

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Vol. 52, No. 5

810-821

EN

Reaction between neomycin. H2, O2 and Cu(II) in carbonate buffer was investigated. It was found that Cu(Il) reacts with H2O2 in the presence of HCO2/CO2 giving the product which absorbs at 364 nm. Neomycin caused the reaction rate to decrease. Reaction progress was monitored at 3 64 nm and its dependence on temperature, pH, and concentration of reagents was studied applying the initial-rate method. The pseudo-first order kinetics of antibiotic degradation by H,O, and Cu(II) was observed and relative rate constant k was calculated at 298 K, 303 K, and 308 K. Based on this reaction, the kinetic spectrophotometric method for determination of neomycin was developed. The proposed method was applied to determination of neomycin in ophthalmic drops.

PL

Badano reakcję neomycyny z nadtlenkiem wodoru w obecności Cu(II), w środowisku buforu węglanowego. Stwierdzono, że w obecności jonów HCO3/CO3Cu(II) reaguje z H2O2dając produkt wykazujący absorpcję przy di. fali 364 nm. Obecność neomycyny powoduje spadek szybkości tej reakcji. Przebieg reakcji monitorowano, przy długości fali 364 nm, badając zależność jej szybkości od temperatury pH i stężenia reagentów metodą szybkości początkowej. Badano kinetykę reakcji rozkładu antybiotyku przez H202 i Cu(II) w warunkach pseudopierwszego rzędu i wyznaczono względną stalą szybkości kr w temperaturze: 298, 303 i 308 K. Na podstawie tej reakcji opracowano kinetyczną, spektrofotometryczną metodę oznaczania neomycyny. Metodę tę zastosowano do oznaczania neomycyny w oftal-micznych postaciach leku.

14

Reactions of Complexation of Co(II), Ni(II), Cu(II), Cd(II) and Hg(II) Ions with Adenosine 5'-Diphosphate

Łomozik L., Gąsowska A., Bregier-Jarzębowska R.

Polish Journal of Chemistry

|

2004

|

Vol.78 /nr 11-12

2023-2035

EN

The reaction of complexation has been studied in the systems of the ions: Co(II), Ni(II), Cu(II), Cd(II) and Hg(II) with adenosine 5_-diphosphate. The composition and stability constants of the complexes formed have been determined by the potentiometric method. The presence of the species type: MHL, MLx, and MLOH has been confirmed and their mode of coordination has been identified on the basis of the spectral data. In the acidic solution, the coordination dichotomy N(1)/N(7) has been found in all systems studied. At pH above 7, the dichotomy does not occur in the systems with Cu(II), while in the systems with Hg(II) only phosphate groups are involved in metallation. In the synthesized solid complexes of Cd(II) with AMPor ADP, the metal ion is bound by the donor nitrogen atom N(1), and in the complexes with ATP by the nitrogen atom N(7) of the nucleotide. Moreover, in the species with adenosine di- and triphosphate, the oxygen atoms of the phosphate groups are engaged in the complexation, while in the species Cd(AMP), similarly as in the liquid phase, the phosphate group is not involved in metallation.

15

The Synthesis and Characterization of 1,2-dihydroxyimino-3,6-di-aza-8,9-O-iso-butylidene Nonane and Its Complexes with Ni(II), Cu(II), Zn(II) and Cd(II)

Canpolat E., Kaya M., Görgülü A. O.

Polish Journal of Chemistry

|

2002

|

Vol. 76 / nr 5

687-694

EN

1,2-Dihydroxyimino-3,6-di-aza-8,9-O-iso-butylidene nonane (H2L) was synthesized starting from 1,2-O-iso-butylidene-4-aza-6-amino hexane (RNH2) and antichloroglyoxime. Ni(II) and Cu(II) complexes ofH2L have a metal:ligand ratio of 1:2 and the ligand coordinates through two N atoms, as do most of the vic-dioximes. However, Zn(II) and Cd(II) complexes of H2L have a metal:ligand ratio of 1:1 and one chloride ion and one water molecule are also coordinated to the metal ion. Structures of the ligand and its transition- metal complexes are proposed, according to elemental analyses, IR, 13C and 1H NMR spectra, magnetic susceptibility measurements and thermogravimetric analyses (TGA).

16

Interaction Centers of Purine and Pyrimidine Nucleotides in Their Reactions with Cu(II), Ni(II), Co(II), Cd(II) and Hg(II) Ions

Gąsowska A., Bregier-Jarzębowska R., Łomozik L.

Polish Journal of Chemistry

|

2002

|

Vol. 76 / nr 6

773-783

EN

It has been established that in ATP complexes with Cu(II), Co(II) and Cd(II) ions, the metallation centres are the oxygen atoms of the phosphate group and the nitrogen atom N(7) from the purine ring. The spectral data suggest some involvement of N(1) atom in these interactions. In the ATP complexes with Ni(II) the main centres of coordination were found to be N(7) and N(1), while the contribution of the oxygen atoms from the phosphate group is of secondary importance. In the ATP complexes with Hg(II) ions, above pH 7, the metallation involves only the oxygen atoms from the phosphate group, while the N(1) and N(7) atoms are outside the inner sphere of coordination. In the complexes of CTP with the metal ions studied the interaction centres are the oxygen atoms from the phosphate group and N(3) from the pyrimidine ring. However, in the case of complexes with Ni(II), the main centre of interaction is N(3), while the involvement of the oxygen atoms from the phosphate group is of minor importance.

17

Synthesis and Characterization of a New Thiazole Schiff Base 5-Bromo-2-hydroxybenzylidene-2-aminobenzothiazole and Its Complexes with Co(II), Cu(II) and NiSaII)

Saydam S., Alkan C.

Polish Journal of Chemistry

|

2001

|

Vol. 75, nr 1

29-33

EN

A new ligand 5-bromo-2-hydroxybenzylidene-2-aminobenzothiazole has been synthesized from 2-aminobenzothiazole and 5-bromosalicylaldehyde by condensation in ethanol. Metal complexes of the ligand were prepared from chloride salts of Co(II), Cu(II), and Ni(II) in ethanol. Characterization of the ligand and its complexes were carried out by microanalyses, magnetic susceptibility measurements, FT-IR, 13C, 1H NMR, and UV-Visible spectroscopy. It was suggested that two ligands with two water molecules coordinate to each metal atom by hydroxy oxygen and imino nitrogen to form high spin distorted octahedral complexes with Co(II), Ni(II) and Cu(II).

18

Specific Interactions of Cu2+ Ions with Enantiomers of Hepatitis B Virus Surface Antigen 140-146 Region

Świątek-Kozłowska J., Brasuń J., Maćkiewicz Z., Kupryszewski G.

Polish Journal of Chemistry

|

2001

|

Vol. 75, nr 6

813-822

EN

Potentiometric and spectroscopic studies on Cu(II) interactions with 140-146 fragment of the hepatitis B virus antigen have shown that the basic binding sites of metal ion are centered at a peptide N-terminal donor system and the side chain donor atoms are not competing in the metal ion coordination.

19

Synthesis, Properties and Thermal Decomposition of Bipyridine-Oxalato Complexes with Mn(II), Co(II), Ni(II) and Cu(II)

Czakis-Sulikowska D., Malinowska A., Radwańska-Doczekalska J.

Polish Journal of Chemistry

|

2000

|

Vol. 74, nr 5

607-614

EN

New mixed-ligand complexes of the following stoichiometric formulae. They have been characterized by IR and VIS spectra and thermoanalysis in air. The central atoms M(II) form coordinate bonds with title ligands.

20

Nucleophilic additions in Cu(II), Ni(II), Co(II) pseudohalide-4-halogenopyrazole systems

Hvastijova M., Kohout J., Mroziński J., Jager L.

Polish Journal of Chemistry

|

1999

|

vol. 73 nr 2

271-278

EN

From M(II)-Y--4-X-pz systems, where M=Cu, Ni, Co; Y=NCO, C(CN)3, N(CN)2; X=Cl, Br, I (pz = pyrazole), new compounds of the type [MY2(4-X-pz)2] and [M(4-X-pz×Y)2] have been prepared. Compounds [M(4-X-pz×Y)2] arise by nucleophylic addition of imine nitrogen from 4-X-pz to cyano carbon of the pseudohalide under formation of five-membered metallocycle. The influence of X substituent on the course of this reaction with various M(II) and Y was investigated. An uncomplete course of nucleophilic addition is revealed by formation of mixed products, consisting of [MY2(4-X-pz)2] and [M(4-X-pz×Y)2]. All compounds were studied by infrared and electronic spectroscopy and probable structures were assigned to the relevant species.