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1.
Summary The synergic solvent extraction of Pr, Gd, and Yb with mixtures of thenoyltrifluoroacetone (HTTA) and a crown ether benzo-15-crown-5 (B15C5) in CCl4, C6H6 and CHCl3 has been studied. The composition of the extracted species has been determined asLn(TTA)3·2B15C5 (Ln=Pr, Gd, and Yb). The values of the equilibrium constants have been calculated.
Synergetische Extraktion von Lanthaniden mit Thenoyltrifluoraceton und Benzo-15-crown-5
Zusammenfassung Es wurde die synergetische Extraktion von Pr, Gd und Yb mit Mischungen ausHTTA und Benzo-15-crown-5 in CCl4, C6H6 und CHCl3 untersucht. Die Zusammensetzung der ExtraktionskomplexverbindungenLn(TTA)3·2B15C5 (Ln=Pr, Gd und Yb) wurde bestimmt, und die Gleichgewichtskonstanten wurden berechnet.
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2.
Summary The hydrolysis of coordinated thiosemicarbazones was studied. It was found that the nickel(II) ion promotes the reaction. Steric and electronic influences were found. The hydrolysis ofATSC in the trigonal bipyramid compounds [M(ATSC)2Cl]Cl [M=Fe(II), Co(II), Ni(II)], is higher with the Ni(II) complex, the compound with the shorterM-N distance.
Semicarbazone und Thiosemicarbazone, 13. Mitt.: Untersuchungen zur Hydrolyse koordinierter Thiosemicarbazone
Zusammenfassung Bei der Hydrolyse von koordinierten Thiosemicarbazonen wurde festgestellet, daß das Nickel(II)-Ion die Reaktion begünstigt. Es wurden sterische und elektronische Einflüsse gefunden. Die Hydrolysengeschwindigkeit desATSC im trigonal bipyramidalen Komplex [M(ATSC)2Cl]Cl [M=Fe(II), Co(II), Ni(II)] ist höher mit dem Ni(II)-Komplex, der Verbindung mit der kürzerenM-N-Distanz.
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3.
Summary The new mixed-ligand complexes of d-electron metals (M(II)=Mn, Ni, Cu) with 2,2'-bipyridine (2-bpy) and mono- or dichloroacetates were prepared as crystalline solids. The general formulae of the synthetized complexes are: Cu(2-bpy)2(CClH2COO)2·2H2O, Mn(2-bpy)2(CCl2HCOO)2, M(2-bpy)2(CCl2HCOO)2·2H2O (M(II)=Ni, Cu). The compounds were characterized by chemical analysis, IR and VIS spectroscopy. Their magnetic, molar conductivity and thermal properties also were studied. During heating in air complexes decompose via different intermediate products to metal oxides. A coupled TG-MS system was used to analyse the principal volatile thermal decomposition (or fragmentation) products of 2,2'-bipyridine-chloroacetato complexes.  相似文献   

4.
Summary Electron impact mass spectra of seven 2,3-dihydro-5-trifluoromethyl/methyl-7-(p-R-phenyl)-1,4-diazepinesR=H, CH3, OCH3, CF3, Cl, Br) have been recorded and are discussed. These systems dissociate by scission of the C2-C3 bond followed by loss of H. to give the [M-H]+ ion as the base peak. The fragmentation behaviour has been investigated using metastable scanning techniques and accurate mass measurements. The origin of some characteristic fragment ions is discussed.
Massenspektroskopische Fragmentierung einiger 2,3-Dihydro-5-trifluormethyl-7-(p-R-phenyl)-1,4-diazepine
Zusammenfassung Die EI-Massenspektren von 7 2,3-Dihydro-5-trifluormethyl/methyl-7-(p-R-phenyl)-1,4-diazepinen (R=CH3, OCH3, CF3, Cl, Br) werden vorgestellt. Diese Verbindungen fragmentieren unter Spaltung der C2-C3-Bindung. Anschließende Abspaltung von H. führt zum Fragment [M-H]+, das als Basispeak auftritt. Das Fragmentierungsverhalten wurde mittels metastabiler Methoden und genauer Massenbestimmungen untersucht. Die Herkunft einiger charakteristischer Fragmentionen wird diskutiert.
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5.
Titanium(IV) dithiocarbamato complexes of the typesCpTi(S2CNHR)Cl2 andCpTi(S2CNHR)2Cl, whereR=C8H5N2S, C9H5N2SCl2 and C9H7N2S, have been prepared by the reaction of monocyclopentadienyl titanium(IV) trichloride with the potassium salt of the appropriate dithiocarbamic acid in anhydrous dichloromethane. Conductance and infrared studies indicate that these complexes are non-electrolytes in which all dithiocarbamate ligands are bidentate. Therefore, 5 and 6 coordinate structures can be assigned toCpTi(S2CNHR)Cl2 andCpTi(S2CNHR)2Cl complexes, respectively.1H-NMR spectra indicate that there is rapid rotation of the cyclopentadienyl ring about the metal ring axis.
Untersuchungen von Monocyclopentadienyl-titan(IV)-dithiocarbamat-Komplexen
Zusammenfassung Es wurden Titan(IV)-dithiocarbamat-Komplexe vom TypCpTi(S2CNHR)Cl2 undCpTi(S2CNHR)2Cl mitR=C8H5N2S, C9H5N2SCl2 und C9H7N2S mittels der Reaktion von Monocyclopentadienyltitan(IV)trichlorid mit dem Kaliumsalz der entsprechenden Dithiocarbaminsäure in wasserfreiem Dichlormethan dargestellt. Leitfähigkeitsmessungen und IR-Untersuchungen zeigen, daß diese Komplexe Nichtelektrolyte sind, bei denen alle Dithiocarbamat-Liganden zweizähnig sind. Demnach können 5-, bzw. 6-koordinierte Strukturen für die Komplexe des TypsCpTi(S2CNHR)Cl2, bzw.CpTi(S2CNHR)2Cl angenommen werden. Die1H-NMR Spektren zeigen eine rasche Rotation des Cyclopentadienylrings um die Metall-Ring Achse an.
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6.
Transition metal sulfite hydrazine hydrates, MSO3·xN2H4·yH2O whereM=Mn, Fe, Co, Ni and Zn have been prepared and characterized by chemical analysis, infrared spectra, thermoanalytical and combustion studies. The colours,x andy parameters of the complexes varied depending upon the preparation conditions. Thermal decomposition characteristics differ from metal to metal yielding metal oxides at relatively low temperatures.
Zusammenfassung Mittels chemischer Analyse, IR-Spektren, thermoanalytischen und Verbrennungsstudien wurden die Hydrazinhydrate der hergestellten Übergangsmetallsulfite MSO3·xN2H4·yH2O mitM=Mn, Fe, Co, Ni und Zn beschrieben. Farbe sowie die Parameterx undy der Komplexe hängen von den Herstellungsbedingungen ab. Die thermische Zersetzung, bei der bei relativ niedrigen Temperaturen Metalloxide entstehen, ist von Metall zu Metall verschieden.
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7.
The complexes [Ni(PEt 3)2 dtc]X (1) and Ni(PEt 3)Xdtc (2) (dtc=S2CNEt 2,X=Cl, Br, I) have been prepared. As conductivity, susceptibility, UV and IR measurements show, the cations [Ni(PEt 3)2 dtc]+ of1 and the complexes2 at ambient temperature have square-planar structure. We suppose there might exist an equilibrium for2 between square-planar and tetrahedral configuration.
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8.
Glutaric dihydrazide (GDH) and adipic dihydrazide (ADH) have been found to react with Co(II) chloride and Ni(II) chloride and nitrate in ethanolic solution to form complexes of the general empirical compositionsMLCl2,ML 2Cl2 and [NiL 2(H2O)2] (NO3)2 whereM=Co(II), Ni(II) andL=GDH,ADH. Tetrahedral geometry has been proposed for 11 complexes of Co(II) and octahedral geometry for the remaining complexes based on measurements of molar conductance, magnetic susceptibility, electronic and ir spectra.
Synthese und Struktur von Co(II)- und Ni(II)-Komplexen von Glutarsäure- und Adipinsäuredihydraziden
Zusammenfassung Glutarsäuredihydrazid (GDH) und Adipinsäuredihydrazid (ADH) bilden mit Co(II)-Chlorid und Ni(II)-Chlorid bzw.-Nitrat in ethanolischer Lösung Komplexe der generellen ZusammensetzungenMLCl2,ML 2Cl2 und [NiL(H2O)2] (NO3)2, mitM=Co(II), Ni(II) undL=GDH,ADH. Für 11-Komplexe von Co(II) wird eine tetragonale Geometrie, für alle anderen Komplexe eine oktaedrische Geometrie vorgeschlagen. Die Basis dazu lieferten Messungen der molaren Leitfähigkeit, der magnetischen Suszeptibilität und der UV- bzw. IR-Spektren.
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9.
p-Tolylmercury selenocyanate and -naphthylmercury selenocyanate act asLewis-bases towards Co(NCS)2·2C2H5N and form a pink compound of the formula (CH5N)2(SCN)2Co(NCSeHgR)2 (R=p-tolyl or -naphthyl). On heating this compounds in vacuum, a blue compound (SCN)2Co(NCSeHgR)2 was formed,RHgSeCN gives a similar compound on reaction with Ni(NCS)2. The compounds (SCN)2 M(NCSeHgR)2;M=Co(II), Ni(II) again act asLewis-acids. In theseLewis-acids Co(II) has a tetrahedral geometry whereas nickel(II) has an octahedral environment through elongated axial bondings ofXCN-groups (X=S or Se). The selenocyanate bridging of the typeR-Hg-SeCN-M is present in these monomer compounds which were characterized by elemental analyses, molar conductance, molecular weight, magnetic moment, stability constant (logK) infrared and electronic spectral studies. These physico-chemical studies indicate that thep-tolylmercury selenocyanate is a better donor than the -naphthylmercury selenocyanate and Ni(NCX)2 is a better acceptor than Co(NCX)2. It has also been observed thatRHgSCN is a better donor thanRHgSeCN. These results are supported by the derivations made from softness parameters.
Untersuchungen zum Lewis-basischen Verhalten vonp-Tolyl-quecksilber-selenocyanaten und -Naphthyl-quecksilber-selenocyanaten
Zusammenfassung p-Tolyl-quecksilber-selenocyanat und -Naphthyl-quecksilber-selenocyanat verhalten sich gegenüber Co(NCS)2·2C5H5N alsLewis-Basen, wobei rosagefärbte Verbindungen der Formel (C5H5N)2(SCN)2Co(NCSeHgR)2 (R=p-Tolyl oder -Naphthyl) entstehen. Beim Erhitzen dieser Verbindungen im Vakuum entstehen die blauen Komplexe (SCN)2Co(NCSeHgR)2,RHgSeCN gibt eine ähnliche Verbindung mit Ni(NCS)2. Die Verbindungen (SCN)2 M(NCSeHgR)2 mitM=Co(II) oder Ni(II) agieren wieder alsLewis-Säuren. In diesenLewis-Säuren besitzt das Co(II) eine tetraedrische Geometrie, währenddessen Ni(II) wegen der gedehnten axialen Bindungen derXCN-Gruppen (X=S oder Se) eine oktaedrische Umgebung aufweist. In den monomeren Verbindungen, die mittels Elementaranalyse, molarer Leitfähigkeit, Molekulargewichtsbestimmungen, magnetischem Moment, Stabilitätskonstanten (logK), IR und Elektronenspektren charakterisiert wurden, ist eine Selenocyanat-Brücke des TypsR-Hg-SeCN-M vorhanden. Die physikalisch-chemischen Daten zeigen an, daßp-Tolyl-quecksilber-selenocyanat der bessere Donor als -Naphthyl-quecksilber-selenocyanat und Ni(NCX)2 der bessere Acceptor als Co(NCX)2 ist. Ebenso wurde beobachtet, daßRHgSCN der bessere Donor alsRHgSeCN ist. Diese Resultate werden mittels HSAB-Parameter unterstützt.
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10.
Summary Metal complexes of the title ligands were characterized in order to determine the factors influencing the stability of chelate isomerism in the same molecule. The ligands were prepared by 1:1 condensation of isonitrosoacetylacetone (Hiso) with eithero-aminophenol (H2 isoaph),p-aminophenol (H2 isopph), or aniline (Hisoanil). The following complexes have been synthesized: [(isoaph)Cu]4, (Hisoaph)2Co, (Hisopph)2 M·nH2O (M=Ni(II), n=2;M=Pd(II), n=0;M=Co(II), n=2), [(isopph) Cu·H2O]2, and (isoanil)2 M (M=Ni(II), Cu(II), Co(II), or Pd(II)). Both chelate rings in these metal complexes are five-membered. Transimination of one –C=N–C6H5 group to –C=NH in (isoanil)2Ni produced a six-membered chelate ring in (isoim)Ni(isoanil). The induced chelate isomerism is ascribed to intermolecular hydrogen bonding of the imino-hydrogen and the basic nitrogen of the same six-membered chelate ring of an adjacent square planar molecule. Other types of hydrogen bondings with the oximato oxygen (intra- or intermolecular) favour the formation of five-membered chelate rings. Analytical, spectroscopic, and magnetic moment data are in accordance with the suggested formulations.Part of the Ph.D. thesis of Sana M. Imam  相似文献   

11.
The vibrational (conventional and far-infrared) and diffuse-reflectance spectra in conjunction with magnetic susceptibility measurements over a temperature range down to liquid nitrogen temperature are reported and discussed for the complexes; [Mn(HPOX)2 X 2]; [Mn(HMPX)2 X 2]; [Fe(HPOX)(POX) X 2] and [Fe(HMPX)(MPX) X 2](whereHPOX=pyridine-2-aldoxime (C6H6N2O);POX=C6H5N2O;HMPX=6-Methylpyridine-2-aldoxime (C7H8N2O);MPX=C7H7N2O;X=Cl, Br, I, NO3, NCS, or OA c andX 2=SO4). On the basis of these physical studies a six-coordinated structure is suggested for the manganese(II) and iron(III) complexes.Mössbauer spectra, measured at room-temperature and liquid nitrogen temperature also indicated a six-coordinate geometry for iron(III) complexes.
Übergangsmetallkomplexe mit Oxim-enthaltenden Liganden, IX. Spektroskopische und magnetische Untersuchungen von Mn(II)- und Fe(II)-Komplexen mit Pyridin-2-aldoxim und 6-Methylpyridin-2-aldoxim
Zusammenfassung Es wurden Komplexe von Pyridin-2-aldoxim (HPOX) und 6-Methylpyridin-2-aldoxim (HMPX) vom Typ [Mn(HPOX)2 X 2], [Mn(HMPX)2 X 2], [Fe(HPOX)(POX)X 2] und [Fe(HMPX)(MPX)X 2] (X=Cl, Br, I, NO3, NCS, OA c;X 2=SO4) dargestellt. Die Diskussion erfolgt basierend auf Infrarot-spektroskopie (inklusive fernes IR), Messungen der magnetischen Suszeptibilität (Temp. bis zu fl. N2) undMössbauer-Spektroskopie.
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12.
Oxathioamidates (CSNR1 R 2COOKR 1=R 2=H (A),R 1=H andR 2=CH3 (B),R 1,=R 2=CH3 (C)) can act as O, S donors and form pentaatomic ring systems with divalent metals (M(II)=Mn, Fe, Co, Ni, Cu, Zn). Vibrational spectra and thermal analysis provide information on the amount and nature of associated water molecules. The dehydration of MA2(H2O)2 (M=Mn, Fe, Co, Ni) can be very well explained by the C.F.S.E. (crystal field stabilization energy) for weak field octahedral complexes. The complexes with ligand A and B decompose to form polymers by deprotonation on the thioamide group. The proposed structures are confirmed by the vibrational spectra. For ligand C no stable intermediates are formed during heating, degradation proceeds until metal sulphide remains.The N.F.W.O. is thanked for the financial support towards the spectroscopic and thermal equipment. The authors are very grateful to Ing. J. Janssens for the TG/DTA measurements.  相似文献   

13.
Summary This paper reports the investigation of the thermal stability of a series of new complexes with mixed ligands of the type M(phen)(C3H3O2)2(H2O)y ((1) M=Mn, y=0; (2) M=Ni, y=2; (3) M=Cu, y=1; (4) M=Zn, y=2; phen=phenanthroline and C3H3O2 is acrylate anion). The thermal behaviour steps were investigated. The thermal transformations are complex processes according to TG and DTG curves including dehydration, oxidative condensation of acrylate and thermolysis processes. The final products of decomposition are the most stable metal oxides.  相似文献   

14.
Polychloroalkanes and -alkenes R(CH2)nCl (R=CHCl2CH2, CCl2=CH, n=1, 3) in dipolar aprotic solvents — dimethylformamide (DMF), dimethylsulfoxide (DMSO), hexamethylphosphoramide (HMPA) — at 130–150°C react selectively at the CH2Cl group with salts of carboxylic acids RCO2K(Na) to form dichloroesters RCO2· (CH2)nR (R=CHCl2CH2, CCl2=CH). In tetrachloroalkanes CCl3CH2(CH2)nCl (n = 1, 3, 5) under the same conditions the selectivity of the CCl3 and CH2Cl groups relative to the nucleophile RCO2K(Na) is altered — unsaturated esters RCO2(CH2)nCH=CCl2 are formed in one stage with yields of 75–90%. Under the selected conditions, high conversion of polychloroalkanes to esters is attained 3 to 5 times more rapidly than in acid media. The structure of the ester obtained has been confirmed by their PMR spectra.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 12, pp. 2790–2793, December, 1990.  相似文献   

15.
The reaction of aquo-ethanolic solutions of Co(II), Ni(II) and Cu(II) salts and ethanolic solution of capric acid hydrazide (L) yielded paramagnetic, high-spin bis- and tris(ligand) chelate complexes. The tris(ligand) complexes, [ML 3]X 2·nH2O [M=Co(II), Ni(II);X=NO 3 – , ClO 4 – , 1/2SO 4 2– ], have an octahedral structure formed on account of the bidentate (NO) coordination of three neutral hydrazide molecules. In the bis(ligand) complexes,ML 2(NCS)2 [M=Co(II), Ni(II)] and CuL 2 X 2·nH2O (X=NO 3 – , ClO 4 – and 1/2SO 4 2– ), the oxoanions and NCS– take also part in coordination. The complexes have been characterized by elemental analysis, IR spectra, magnetic measurements, molar conductivity and TG analysis.
Caprinsäurehydrazid-Komplexe von Co(II), Ni(II) und Cu(II)
Zusammenfassung Durch die Reaktion von wäßrig-ethanolischen Lösungen von Co(II)-, Ni(II)-und Cu(II)-Salzen mit einer ethanolischen Lösung von Caprinsäurehydrazid (L) wurden paramagnetische high-spin Bis- und Tris-Ligand-Chelatkomplexe erhalten. Tris-Ligand-Komplexe des Typs [ML 3 X 2·nH2O [M=Co(II), Ni(II);X=NO 3 – , ClO 4 – , 1/2SO 4 2– ], die eine oktaedrische Struktur besitzen, entstehen durch die Koordination von drei neutralen zweizähnigen (NO)-Hydrazidmolekülen. Bei den Bis-Ligand-KomplexenML 2(NCS)2 [M=Co(II), Ni(II)], sowie bei den Bis-Ligand-Komplexen CuL 2 X 2·nH2O (X=NO 3 – , ClO 4 – , 1/2SO 4 2– ) nehmen bei der Koordination außer Hydrazid auch die Säurereste teil. Die Komplexe wurden durch Elementaranalyse, IR-Spektren, magnetische Messungen, molare Leitfähigkeit und TG-Analysen charakterisiert.
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16.
Four new mixed ligand complexes were prepared by the reaction of title metal dichloroacetates and 2,4'-bipyridine. The general formulae of synthesized compounds are M(2,4'-bpy)2(CCl2HCOO)2·nH2O (where M(II)=Mn, Co, Ni, Cu; 2,4'-bpy=2,4'-bipyridine, n=2 or 4). The complexes have been isolated from aqueous media and characterized by chemical analysis, molar conductance (in MeOH, DMSO and DMF), magnetic, IR and VIS spectral studies. The nature of metal(II)-ligand coordination is discussed. The thermal behaviour of obtained complexes was studied by thermal analysis and TG-MS techniques in air. IR, X-ray powder diffraction and thermoanalytical data were used for the determination of solid intermediate products of the thermal decomposition. The principal volatile products of thermal decomposition of complexes were proved by mass spectroscopy: H2O+, CO+ 2, HCl+ 2, Cl+ 2, NO+ and other. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

17.
Zusammenfassung Die Zersetzung von CsNO3, Bi(NO3)3, Bi(NO3)3·5H2O, BiONO3, 2CsNO3·Bi(NO3)3 und 3M(NO3)2·2Bi(NO3)3·24H2O (M=Mg, Mn, Co, Ni, Zn) wurde thermogravimetrisch untersucht. Es wurde festgestellt, daß 2CsNO3·Bi(NO3)3 über eine beständige Zwischenstufe 2CsNO3+1/2Bi2O3, die Doppelnitrate 3M(NO3)2·2Bi(NO3)3·24H2) über 3M(NO3)2+2BiONO3 zerfallen. Eine Herabsetzung der thermischen Stabilität des CsNO3 wegen der Anwesenheit von Bi2O3, und der NitrateM(NO3)2 wegen der Anwesenheit von BiONO3 wurde beobachtet. Zugleich ist BiONO3 von zweiwertigen Nitraten stabilisiert.
The thermal decomposition of some bismuth double nitrates
The decomposition of CsNO3, Bi(NO3)3, Bi(NO3)3·5H2O, BiONO3, 2CsNO3·Bi(NO3)3, and 3M(NO3)2·2Bi(NO3)3·24H2O (M=Mg, Mn, Co, Ni, Zn) has been studied by thermogravimetric analysis. It was found that 2CsNO3·Bi(NO3)3 decomposesvia a stable intermediate, 2CsNO3+1/2Bi2O3, and the double nitrates 3M(NO3)2·2Bi(NO3)3·24H2)via 3M(NO3)2+2BiONO3·Bi2O3 and BiONO3 decrease the thermal stability of CsNO3 andM(NO3)2, resp. Bivalent nitrates stabilize BiONO3 to a certain degree.

Auszug aus einem Teil der Magisterarbeit vonF. Lazarini.  相似文献   

18.
New mixed-ligand complexes of general formulae Mn(4-bpy)(CCl3COO)2⋅H2O, Ni(4-bpy)2(CCl3COO)2⋅2H2O and Zn(4-bpy)2(CCl3COO)2⋅2H2O (where 4-bpy=4,4’-bipyridine) were obtained and characterized. The IR spectra, conductivity measurements and other physical properties of these compounds were discussed. The central atoms M(II) form coordinate bonds with title ligands. The thermal behaviour of the synthesized complexes was studied in air. During heating the complexes decompose via different intermediate products to Mn3O4, NiO and ZnO; partial volatilization of ZnCl2was observed. A coupled TG-MS system was used to the analysis of the principal volatile thermal decomposition products of Mn(II) and Ni(II) complexes. The principal volatile mass fragments correspond to: H2O+, OH+, CO+ 2, HCl+, Cl+ 2, CCl+ and other. This revised version was published online in August 2006 with corrections to the Cover Date.  相似文献   

19.
Summary. The reaction of RuTp(COD)Cl (1) with PPh2Pri and terminal alkynes HCCR (R=C6H5, C4H3S, C6H4OMe, Fc, C6H4–Fc, C6H9) affords the neutral vinylidene complexes RuTp(PPh2Pri) (Cl)(=C=CHR) (2a–2f) in high yields. These complexes do not react with MeOH to give methoxy carbene complexes of the type RuTp(PPh2Pri)(Cl)(=C(OMe)CH2R), but react with oxygen to yield the CO complex RuTp(PPh2R)(Cl)(CO) (3). The structures of 2b, 2f, and 3 have been determined by X-ray crystallography.  相似文献   

20.
Zusammenfassung Es wurde die synergistische Extraktion von Pr, Gd und Yb mit einer Mischung aus Thenoyltrifluoraceton und Trioctylamin untersucht. Als Lösungsmittel wurden CCl4, C6H6 und CHCl3 verwendet. Die Zusammensetzung der extrahierten Komplexe wurde bestimmt, ebenso die Extraktionskonstanten und die Bildungskonstanten der Komplexe. Die Annahmen über die Koordinationszahl der Lanthanide werden besprochen. Die Untersuchung über den Einfluß der Lösungsmittel ergab, daß die Extraktion eines bestimmten Elements in der Reihenfolge CCl4>C6H6>CHCl3 erhöht wird.
Synergistic extraction of lanthanides with thenoyltrifluoracetone and trioctylamine
The synergistic extraction of Pr, Gd, and Yb with a mixture of thenoyltrifluoroacetone and trioctylamine has been investigated. The employed solvents were CCl4, C6H6, and CHCl3. The composition of the extracted complexes was determined, likewise, the extraction constants and the formation constants of the complexes. The assumptions about the coordination number of the lanthanides have been discussed. The investigation of the influence of the solvents showed that the extraction of one and the same element increases in the order CCl4>C6H6>CHCl3.

Mit 4 Abbildungen  相似文献   

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