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  • 1975-1979  (16)
  • 1
    Electronic Resource
    Electronic Resource
    [(C6H5)4As]2[Ni(Se2C:C(CN)2)3], a new nickel(IV) chelate with an unsaturated 1,1-diselenolate ligand (1978)
    s.l. : American Chemical Society
    Inorganic chemistry 17 (1978), S. 1665-1667 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic50184a057
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  • 2
    Electronic Resource
    Electronic Resource
    Individual sensitivity to lactose in lactose malabsorption (1977)
    Springer
    Digestive diseases and sciences 22 (1977), S. 177-181 
    Details
    ISSN: 1573-2568
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The clinical significance of lactose malabsorption and the individual sensitivity to lactose were investigated in 20 patients with verified lactose malabsorption. Thirteen patients were relieved of all symptoms while seven improved only on a lactose-free diet. The healthy patients did not experience any symptoms following provocation with lactose-free milk but following provocation with increasing amounts of lactose, the tendency to diarrhea and abdominal discomfort increased considerably. Three patients experienced discomfort after provocation with only 5 g lactose. On provocation with increasing amounts of lactose the seven patients who had not recovered also developed increased abdominal discomfort but none of them developed increased tendency to diarrhea. It is concluded that, in addition to lactose malabsorption, these patients must suffer from irritable colon with tendency to constipation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01072273
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  • 3
    Electronic Resource
    Electronic Resource
    A. A. Nemodruk und E. V. Bezrodova, Fotochimičeskie reakcii v analitičeskoj chimii (Photochemische Reaktionen in der analytischen Chemie). 168S., 39 Abb., 11 Tab. Verlag Chimija, Moskau 1972. 0,53 Rub (1977)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 319 (1977), S. 174-174 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19773190124
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  • 4
    Electronic Resource
    Electronic Resource
    Zur Chemie der Acylthioharnstoffe. IIIAls II. Mitt. gilt: Lit. [1]; als I. Mitt.: J. Liebscher u. H. Hartmann, Z. Chem. 14, 470 (1974).. Bildung von 1,3,5-Thiadiazin-2-thionen bei Acylsenföl-Amin-Umsetzungen (1978)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 320 (1978), S. 647-650 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: On the Chemistry of Acylthioureas. III. Synthesis of 1,3,5-Thiadiazine-2-thiones by the Reaction of Acylisothiocyanates with AminesIn course of synthesis of benzoyl-thioureas from benzoyl-isothiocyanate and sec. amines some new 6-amino-4-phenyl-1,3,5-thiadiazine-2-thione 5 are prepared and characterized chemically and spectroscopically.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19783200418
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  • 5
    Electronic Resource
    Electronic Resource
    H. Sigel, Metal ions in biological systems. Vol. 3: High molecular complexes. (Metallionen in biologischen Systemen, Bd. 3: Hochmolekulare Komplexe.) XIII, 289 S., 60 Abb., 19 Tab. Marcel Dekker, Inc., New York 1974. $ 22.75 (1975)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 317 (1975), S. 349-350 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19753170223
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  • 6
    Electronic Resource
    Electronic Resource
    Nickelchelate von β-Mercaptozimtaldehyden und deren Azomethinen (1975)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 317 (1975), S. 265-272 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Synthese α-unsubstituierter dimerer β-Mercaptozimtaldehyde 1 a - d, zugänglich über die β-Chlorvinylaldehyde, sowie daraus abgeleiteter Azomethine 2 a - f wird beschrieben. Die dargestellten Verbindungen und einige ihrer diamagnetischen Nickelchelate werden u. a. IR-, UV/VIS-, NMR- und massenspektroskopisch charakterisiert. Eine Template-Reaktion mit o-Phenylendiamin am Nickelchelat des p-Chlor-β-mercaptozimtaldehyds 3 b ergibt ein makrocyclisches Chelat system des Typs NiN2S2.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19753170211
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  • 7
    Electronic Resource
    Electronic Resource
    Synthese und Charakterisierung neuartiger Übergangsmetallchelate von 1,1-Dialkyl-3-benzoyl-thioharnstoffen (1975)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 317 (1975), S. 829-839 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die 1,1-Dialkyl-3-benzoyl-thioharnstoffe 1 erweisen sich als ausgezeichnete Chelatbildner mit Übergangsmetallionen.Die Chelate mit Nickel(II), Kupfer(II), Kobalt(III) und Palladium (II) werden charakterisiert. Für den Kupfer(II)-Komplex von 1,1-Diäthyl-3-benzoylthioharnstoff 2d wird ESR-spektroskopisch eine CuO2S2-Koordination mit rhombischer Symmetrie bewiesen. Die Chelatkomplexe von 1 mit Nickel(II) und Kobalt(III) verhalten sich magnetisch anormal. Die Nickel(II)-chelate bilden magnetisch normale hellgrüne Bispyridinaddukte 4.In einigen Fällen wurden kristalline Addukte mit einem Mol Chloroform pro Mol Komplex isoliert.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19753170518
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  • 8
    Electronic Resource
    Electronic Resource
    Kristall- und MolekülStruktur von Bis(1,1-diäthyl-3-benzoyl-thioureato)palladium(II) (1977)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 433 (1977), S. 237-241 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal and Molecular Structure of Bis(1,1-diethyl-3-benzoyl-thioureato)palladium(II)The crystal structure of the complex bis(1,1-diethyl-3-benzoyl-thioureato)palladium(II) has been determined by X-ray crystal structure analysis. The substance crystallizes monoclinic, space group P21/n and cell dimensions a = 13.63, b = 19.88, c = 10.48 Å, β = 101.4° and 4 formula units in the unit cell. The structure was solved by conventional heavy atom methods and has been refined to a final R-value of 0.12. The S and O atoms are arranged in cis-position. Each Pd—S and Pd—O distances are different. The chelate rings are arranged in a plane.
    Notes: Die Kristallstruktur von Bis(1,1-diäthyl-3-benzoyl-thioureato)palladium(II) wurde durch Röntgeneinkristallstrukturanalyse bestimmt. Die Verbindung kristallisiert monoklin, Raumgruppe P21/n mit a = 13,63, b = 19,88, c = 10,48 Å, β = 101,4° Z = 4. Die Struktur wurde mit Hilfe der Schweratommethode gelöst und bis zu einem R-Wert von 0,12 verfeinert. Die S- und O-Ligatoratome sind in cis-Stellung angeordnet. Alle Pd—S- und Pd—O-Abstände sind unterschiedlich lang. Die Chelatringe sind eben gebaut.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19774330127
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  • 9
    Electronic Resource
    Electronic Resource
    Chelatbildung mit 1,3-Diamino-2-methylenpropanen (1975)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 413 (1975), S. 10-26 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chelate Formation with 1,3-Diamino-2-methylene Propane11,3-Diamino-2-methylene propane and its N, N′ alkylated derivatives form crystalline chelates with CoII (1:3), NiII (1:1, 1:2 and 1:3), PdII (1:1, 1:2), RhIII (1:1) and CuII (1:2). Experiments for preparation of olefin complexes were unsuccessful.By potentiometric measurements the base strengths of the ligands as well as the stability constants of the CoII, NiII, PdII, CuII, ZnII, CdII chelates were evaluated and the kinetics of the formation of the 1:1 PdII complex is investigated.The magnetic behaviour of the CoII-, PdII- and CuII- chelates is normal, whereas[Ni(dia)2(H2O)2] (ClO4)2 shows anormal behaviour due to configurational isomerism between square planar and octahedral ligand geometry in solid state in type of a LIFSCHITZ-isomerism.The ESR-spectra of the CuII-compounds are discussed and the bonding parameters of the Cu—N-bonds were calculated.
    Notes: 1,3-Diamino-2-methylenpropan, CH2 = C(CH2NH2)2, und seine N,N′-alkylierten Derivate bilden mit CoII (1:3), NiII (1:1, 1:2 und 1:3), PdII (1:1 und 1:2), RhIII (1:1) und CuII (1:2) kristalline Chelate. Versuche zur Isolierung von Olefinkomplexen blieben dagegen erfolglos.Die pH-potentiometrisch bestimmten Basenstärken der Liganden sowie die Stabilitätskonstanten der CoII-, NiII-, PdII-, CuII-, ZnII-, CdII-Chelate des 1,3-Diamino-2-methylenpropans werden angegeben; die Kinetik der Bildung des 1:1 Pd-Chelates wird untersucht.Das magnetische Verhalten der CoII-, PdII- und CuII- Chelate ist normal, während [Ni(dia)2(H2O)2](ClO4)2 im kristallinen Zustand Konfigurationsisomerie zwischen quadratisch planarer und oktaedrischer Anordnung im Sinne einer LIFSCHITZ-Isomerisierung aufweist.Die ESR-Spektren der CuII-Verbindungen werden diskutiert und die Bindungsparameter der Cu—N-Bindung berechnet.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19754130103
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  • 10
    Electronic Resource
    Electronic Resource
    Untersuchungen zur Alkylierung von Bis-Stilbendithiolato-Komplexen des Ni(II), Pd(II) und Pt(II)XXIV. Mitt. der Reihe „Dithiolenchelate“; XXIII. Mitt.: R. Kirmse, W. Dietzsch u. D. Rehorek, Z. Chem. 17, 33 (1977); XIX. Mitt.: R. Kirmse, W. Dietzsch u. E. Hoyer, Z. Chem. 14, 106 (1974). (1978)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 440 (1978), S. 253-264 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Investigation on the Alkylation of Bis-Stilbendithiolato Complexes of NiII, PdII, and PtIIAlkylation reactions of co-ordinated ligands of the type of ethylene-bisthiol R2S2C22-proceed different depending on the substituents R.The neutral complexes isolated by a alkylation of the nickel bis-chelates (R = phenyl) according to Schrauzer and Rabinowitz and formulated by these authors as mixed ligand chelates of dithiolate and diether, were identified by us as complexes of the monoethers of the ligand.These nickel (II) complexes of the mono-ethers can not be alkylated further by alkyliodides.Oxidative coupling of two ligands yields disulfides which have been identified by mass spectroscopy thus indicating the original position of attack of the alkylating reagent. The formation of bis-monether complexes is reflected by the different charges on the S atoms of the model complex [Ni(CH3S2C2H2)(S2C2H2)]- obtained from EHT and CNDO calculations.Both possible stereo-isomers have been isolated of the bis-methylmonether complex of Pt(II). Trans-[M((CH3)(S2C2Ph2))2] (M = Ni(II), Pd(II)) form CH2Cl2 adducts.By treating the Ni-bis complexes of the monoalkylthioethers with iodine polyiodides are prepared.Binuclear Pd(II) complexes of composition [Pd2((R)(S2C2Ph2))2Cl2] could be prepared by metal exchange.
    Notes: Alkylierungsreaktionen an koordinierten vom Typ der Äthylen-1, 2-dithiolate R2S2′C22- verlaufen je nach Substituenten R verschieden.Die von Schrauzer und Rabinowitz durch Alkylierung der Nickel-bis-Chelate (R = Phenyl) erhaltenen neutralkomplexe, die sie als Gemischtligandenkomplexe formulieren, wurden von uns als Halbätherkomplexe identifiziert.Die Ni(II)-Halbätherkomplexe lassen sich mit Alkyljodiden nicht weiter alkylieren. Ihre Oxydation gibt durch die Verknüpfung zweier Liganden Disulfide, deren massenspektroskopische Identifizierung den ursprünglichen Alkylierungsort anzeigt. Die Bildung von Halbätherkomplexen wird sowohl durch EHT-als auch CNDO-Rechnungen anhand der unterschiedlichen Ladungsdichten an den S-Atomen des Modellkomplexes [Ni(CH3)(S2C2H2)]- gestützt. Vom Pt(II)-Methyl-halbätherkomplex wurden beide möglichen geometrischen Isomere isoliert.Trans-[M((CH3)(S2C2Ph2))2] (M = Ni(II), Pd(II), Pt(II)) bilden mit Methylenchlorid Addukte. Die Nickel (alkylhalbäther) komplexe liefern mit Jod in CHCl3 Polyjodidkomplexe. In einer Metallaustauschreaktion wurden Palladium-Zweikern-Komplexe [Pd2((R)(S2C2Ph2))2Cl2] dargestellt.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19784400127
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