首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 31 毫秒
1.
Ohne Zusammenfassung
Conduotometric determination of Ni(II), Co(II) and Cu(II) ions based on the formation of pyridine-rhodanide complexes
  相似文献   

2.
3.
Metal Complexes of Biologically Important Ligands. CIII. [1] Palladium(II), Platinum(II), Ruthenium(II), Rhodium(III), and Iridium(III) Complexes of Desoxyfructosazine The reactions of the pyrazine derivative desoxyfructosazin(pz) with K2PtCl4 and with the chlorobridged [M(PR3)Cl2]2 (M = Pd, Pt), [(η5-C5Me5)MCl2]2 and [(η6-p-Cymol)RuCl2]2 give the watersoluble complexes cis-Cl2Pt(pz)2, (R3P)(Cl)M(pz)M(Cl)(PR3) (M = Pd, Pt), (η5-C5Me5)(Cl)2M(pz)M(Cl)25-C5Me5) (M = Rh, Ir), (η6-p-Cymol)(Cl2)Ru(pz)Ru(Cl)26-p-Cymol).  相似文献   

4.
5.
Zusammenfassung Die synergistische Extraktion von Eisen(II)-, Cobalt(II)- und Nickel(II)-Komplexen wird untersucht. Verwendet wurden fluorierte Diketone (A) (Hexafluoroacetylaceton und Derivate des Thenoyltrifluoracetons) und Abkömmlinge des Pyridinal(2)-phenylimins und des Bis-(pyridinal-2-)-diimines (B). Aus den Extraktionskurven nach der Job- und der Molar-Ratio-Methode, der Elementaranalyse und aus Molmassenbestimmungen werden Komplexverbindungen der Zusammensetzung [MA2B1], [M2A4B2] und [M3A6B3] nachgewiesen. Aus den Elektronen- und IR-Spektren und aus magnetischen Messungen wird für die Ni(II)-Komplexe eine octaedrische Struktur vorgeschlagen.
Investigation and structure analysis of iron(II), cobalt(II) and nickel(II) complexes after synergistic extraction
Summary The synergistic extraction of iron(II), cobalt(II) and nickel(II) complexes was investigated. Fluorinated diketones (A) (hexafluoroacetylacetone and derivatives of thenoyltrifluoracetones) and derivatives of pyridinale(2)-phenylimine and bis(pyridinale-2-)diimine (B) were used. By Job and molar-ratio investigation on the extraction curves, by elementary analysis and molar mass detection complex compounds of the composition [MA2B1], [M2A4B2] and [M3A6B3] could be proved. Electron and infrared spectra and magnetical measurements led to an octahedral structure proposal for the Ni(II)-complexes.
Wir danken Herrn Dr. Bodo Plewinsky, Institut für Anorganische Chemie der FU Berlin, sehr herzlich für die Bestimmung der Molmassen mit der Ultrazentrifuge.  相似文献   

6.
7.
Zusammenfassung Zur synergistischen Extraktion von Eisen(II)-, Cobalt(II)- und Nickel(II)-Komplexen werden fluorierte Diketone(A) (Derivate des Thenoyltrifluoracetons) und eine neue Gruppe Schiffscher Basen verwendet. Aus den Extraktionskurven nach der Job- und der Molar-Ratio-Methode, der Elementaranalyse und aus Molmassenbestimmungen werden Komplexverbindungen der Zusammensetzung [MA2B] nachgewiesen. Aus den Elektronen- und IR-Spektren und aus magnetischen Messungen wird für die Ni(II)-Komplexe eine octaedrische Struktur vorgeschlagen.
Structure analysis and preparation of a new group of iron(II), cobalt(II) and nickel(II) complexes after synergistic extraction
Summary For the synergistic extraction of iron(II), cobalt(II) and nickel(II) complexes fluorinated diketones(A) (derivates of thenoyltrifluoroacetones) and a new group of Schiff bases were used. Complex compounds of the composition [MA2B] could be proved by Job- and molar-ratio method investigation of the extraction curves, by elementary analysis and by molar mass detection. Electron and infrared spectra and magnetical measurements led to an octahedral structure proposal for the Ni(II) complexes.


Mein Dank gilt besonders Herrn Professor Dr. D. E. W. Trincker, Direktor des Instituts für Physiologie II der RUB, für die Bereitstellung der Geräte und Chemikalien.  相似文献   

8.
The crystal structure of (C5H5)3Pr·CNC6H11 was determined from single-crystal X-ray diffraction data. The monoclinic unit cell of dimensions a = 8.298(3), b = 21.66(1), c = 11.943(4) Å, and β = 104.98(3)° contains four molecules in general positions of space group P21/c. Each molecule is composed of three C5H5 rings in a nearly exact trigonal array, η5-bonded to the Pr atom at a distance of 2.53 Å to the centroid of each ring, plus a single CNC6H11 adduct attached to the Pr atom along the trigonal axis at 2.65 Å. The presence of a CN triple bond in the isonitrile moiety and the nearly linear CNC configuration add credence to the previous proposal that there is a pure donor bond from the isonitrile carbon to the metal atom.  相似文献   

9.
Synthesis of Substituted Calcium-bis(disilylamides) by Transmetalation of Tin(II) and Tin(IV) Amides Stannylenes as well as stannanes with substituted disilylamino groups are valuable synthons for the synthesis of alkaline earth metal bis(disilylamides) via the transmetallation reaction. Whereas bis[2,2,5,5-tetramethyl-2,5-disilaaza-cyclo-pentyl]stannylene 1 is a suitable reagent for this type of reaction, bis[trimethylsilyl-tris(trimethylsilyl)silylamino]stannylene 2 (monoclinic, P21/c, a = 1492.6(2), b = 1705.2(2), c = 1865.3(3) pm, β = 109.03(2)º, Z = 4) is not only attacked at the Sn? N-bond but also the N? Si-bond is cleaved by calcium metal. Similar light sensitivity as for 2 is observed for the mercury bis[trimethylsilyl-tris(trimethylsilyl)silylamide] 3 , the homolytic M? N-bond cleavage leads to the formation of the trimethylsilyl-tris(trimethylsilyl)silylamino radical (g = 2.00485; a(N) = 16.2 G). The calcium tin exchange reaction of 1 in THF yields tris(tetrahydrofuran-O)calcium-bis[2,2,5,5-tetramethyl-2,5-disilaaza-cyclo-pentanide] 4 (monoclinic, P21/n, a = 1060.9(2), b = 1919.3(5), c = 1686.0(3) pm, β = 90.30(2)º, Z = 4). The stannanes Men-4Sn[N(SiMe3)2]n with n = 1 or 2 are also valuable materials for the synthesis of bis(tetrahydrofuran-O)calcium-bis[bis(trimethylsilyl)amide].  相似文献   

10.
Crystal and Molecular Structure of 1,8-Dihydroxy-3,6-dithiaoctan-bis-mercury(II) Chloride The crystal structure of 1,8-dihydroxy-3,6-dithiaoctane-bis-mercury(II) chloride has been determined by X-ray crystal structure analysis. The compound crystallizes monoclinic, space group C2/c with a = 15.311(2), b = 5.870(2), c = 17.479(2) Å, β = 102.76° and 4 formula units per unit cell. The structure was solved by heavy atom technique and refined to a final R value of R = 0.050. Mercury is digonally coordinated by an S and a Cl ligator. In consequence of weak interactions to an oxygen atom of the ligand as well as to three further Cl ions the coordination number is increased to six and a strongly distorted octahedron is formed. The crystal structure is built up from polymeric complex molecules.  相似文献   

11.
12.
13.
14.
15.
16.
A solution of 1-[thenoyl-(2′)]-3,3,3-trifluoracetone (HTTA) in benzene does not extract Fe(II), Co(II) and Ni(II) from acetate buffered aqueous solutions in measurable quantities. The same phenomenon is observed when benzene solutions of 2-pyridineal-phenylimines [B1] or bis-(2-pyridineal)-R-diimines [B2] are used. However, mixtures of HTTA and B1 (or B2) exhibit a strong synergistic enhancement of the partition coefficients. The composition of the extracted mixed complexes was determined and analytical applications of these synergistic effects were discussed.  相似文献   

17.
18.
19.
20.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号