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  • 1
    Electronic Resource
    Electronic Resource
    Synthese und 1H-NMR-spektroskopische Untersuchungen neuer Curcuminanaloga (1992)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 334 (1992), S. 696-700 
    Details
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis and 1H-NMR Spectroscopic Investigations of New Curcumin AnalogaThe synthesis of numerous symmetric and non-symmetric curcumin(hetero) analoga (1-3) systematic variation of the conjugated chain and substituents is described. The structure of most compounds is confirmed by 1H-n.m.r.-spectroscopy. All compounds show E-configuration. Conjugation and tautomerism are discussed based on spectroscopic data.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19923340810
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  • 2
    Electronic Resource
    Electronic Resource
    4-Benzimino-3-phenyl-1,3-selenazetidin-2-thion und 4-Benzimino(ethoxycarbimino)-3-phenyl-1,3-thiazetidin-2-thione (1993)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 335 (1993), S. 381-384 
    Details
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 4-Benzimino-3-phenyl-1,3-selenazetidine-2-thione und 4-Benzimino(ethoxycarbimino)-3-phenyl-1,3-thiazetidine-2-thiones
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19933350415
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  • 3
    Electronic Resource
    Electronic Resource
    Synthese, koordinationschemische und massenspektrometrische Charakterisierung neuartiger carboxylsubstituierter N-(Thiocarbamoyl)-benzamidine (1990)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 332 (1990), S. 359-366 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis, Coordination Chemistry and Mass Spectrometric Fragmentation of New N-(Thiocarbamoyl)-benzamidinesSyntheses of N-(thiocarbamoyl)benzamidines from benzimidoylchlorides and aromatic amino acids as starting materials are reported. The prepared compounds were used as ligands for complexing nickel(II) and copper(II)ions. The benzamidines were characterized by mass spectrometric methods. The fragmentation pattern of the benzamidines was derived from the corresponding MIKE-spectra.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19903320313
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  • 4
    Electronic Resource
    Electronic Resource
    Flüssig-Flüssig-Extraktion von Metallionen mit LariatethernHerrn Professor Dr. E. Hoyer zum 60. Geburtstag gewidmet (1991)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 333 (1991), S. 413-421 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Liquid-Liquid-Extraction of Metal Ions with Lariat Ethers.Lariat ethers of various ring size and substitution are synthesized and characterized by physical data and chemical analysis. The extraction behaviour of the crown compounds towards Na+, K+, Cs+ and Ag+ in a picric acid solution has been investigated. The extraction contants for 1:1 and 1:2 complexes are determined using the equilibrium distribution data. The results show that the flexible side chain in the investigated compounds has in no case a positive effect on the metal picrate extraction.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19913330306
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  • 5
    Electronic Resource
    Electronic Resource
    Zur reversiblen Umwandlung von 3-Diethylamino-5-phenyl-1,2,4-dithiazolium-halometallaten in Metallchelate der 3-(Thio)benzoyl(thio)harnstoffeHerrn Prof. Dr. E. Hoyer zum 60. Geburtstag gewidmet (1991)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 333 (1991), S. 537-544 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: About the Reversible Conversion of 3-Diethylamino-5-phenyl-1,2,4-dithiazoliumhalometallates into Metal Chelates of 3-(Thio)benzoyl(thio)ureasRedox reactions of 3-diethylamino-5-phenyl-1, 2,4-dithiazolium halometallates 1a-e and metal chelates (M = CuII (2 A), CoII (2 C), NiII (2 F)) of 3-thiobenzoylthioureat was studied by cyclic voltammetry. 1 are converted by reduction into 2. The mechanism of the oxidation of 2 A, C, F into 1a, d, e is dependent on the central ion.On formation of 1 a from copper(II) chelates of 3-benzoylthiourea 3 A by means of thionylchloride as well as by electrochemical oxidation 3-benzoylureas 4 A are formed as sideproducts.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19913330404
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  • 6
    Electronic Resource
    Electronic Resource
    Kristall- und Molekülstruktur von Tris(1,1-diethyl-3-benzoyl-thioureato)ruthenium(III) (1990)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 580 (1990), S. 167-174 
    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 Tris(1,1-diethyl-3-benzoyl-thioureato)ruthenium(III)The crystal and molecular structure of tris(1,1-diethyl-3-benzoyl-thioureato)-ruthenium(III) has been determined by an X-ray structure analysis. The compound crystallizes in the trigonal space group P3 with a = 16.556, c = 8.476 Å and Z = 2. The structure was solved by Patterson methods and refined to a final R value R = 0.074 for 801 observed reflections. The molecule has the symmetry C3. The coordination polyhedron is an octahedron with facial arrangement of the ligator atoms. The Ru—S and Ru—O distances are 2.293 Å and 2.047 Å, respectively.
    Notes: Die Kristall- und Molekülstruktur von Tris(1,1-diethyl-3-benzoyl-thioureato)ruthenium(III) wurde durch Röntgenkristallstrukturanalyse bestimmt. Die Verbindung kristallisiert trigonal in der Raumgruppe P3 mit den Gitterkonstanten a = 16,556, c = 8,476 Å und Z = 2. Die Struktur wurde mittels Patterson-Methoden gelöst und bis zu einem abschließenden R-Wert R = 0,074 für 801 beobachtete Reflexe verfeinert. Das Molekül besitzt die Symmetrie C3. Das Koordinationspolyeder ist ein Oktaeder mit facialer Anordnung der Ligator-Atome. Die Ru—S- und Ru—O-Abstände betragen 2,293 Å bzw. 2,047 Å.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19905800120
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  • 7
    Electronic Resource
    Electronic Resource
    Synthese und Struktur von Bis(3-diethylamino-5-phenyl-1,2,4-dithiazolium)-tetrachlorocobaltat(II) (1990)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 586 (1990), S. 79-86 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Structure of Bis(3-diethylamino-5-phenyl-1,2,4-dithiazolium)-tetrachlorocobaltat(II)The title compound 1 was prepared by reaction of Tris(1,1-diethyl-3-benzoyl-thioureato)cobalt(III) with SOCl2 in acetonitrile. 1 has been characterized by IR-spectroscopy and VIS-spectroscopy.The structure of 1 has been determined by an X-ray structure analysis. The compound crystallizes in the monoclin space group C2/c with a = 16.224; b = 11.257; c = 17.697 Å; β = 107,43° and Z = 4. The final R value was R = 0.027 for 2073 observed reflections.The cation of 1 is nearly plane with an extended delocalization of electrons. The CoCl42- anion is tetrahedral with two different long Co—Cl pairs. Interionic contacts S … Cl exists between the structural units of the cations and the anion.
    Notes: Die Darstellung der Titelverbindung 1 erfolgt aus Tris(1,1-diethyl-3-benzoyl-thioureato)-cobalt(III) mit SOCl2 in Acetonitril. 1 wird IR-spektroskopisch und durch VIS-Spektren charakterisiert.Die Struktur von 1 wurde durch Röntgenkristallstrukturanalyse bestimmt. Die Verbindung kristallisiert monoklin in der Raumgruppe C2/c mit den Gitterkonstanten a = 16,224; b = 11,257; c = 17,697 Å, β = 107,43° und Z = 4. Der abschließende R-Wert betrug R = 0,027 für 2073 beobachtete Reflexe.Das Kation von 1 ist nahezu planar und weist eine weitreichende Elektronendelokalisierung auf. Das CoCl42--Anion ist tetraedrisch strukturiert und besitzt zwei unterschiedlich lange Co—Cl-Paare. Zwischen Kation- und Anion-Struktureinheiten bestehen über S und Cl interionische Wechselwirkungen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19905860111
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  • 8
    Electronic Resource
    Electronic Resource
    cis-trans-Isomerie bei N-Thioacyl-thioharnstoff-Chelaten: Die Struktur des cis-Bis(1,1-diethyl-3-thiobenzoyl-thioureato)nickel(II)Professor Rudolf Taube zum 60. Geburtstage gewidmet (1991)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 603 (1991), S. 25-32 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cis-Trans Isomerism in N-Thioacyl Thiourea Chelates: The Structure of cis-Bis(l,l-diethyl-3-thiobenzoyl-thioureato)nickel(II)In addition to two crystalline modifications in which the ligands are arranged in trans position, bis(1,1-diethyl-3-thiobenzoyl-thioureato)nickel(II) forms a further modification with cis position of the ligands whose structure has been confirmed by an X-ray structure analysis. It crystallizes in the space group P21/c with a=11.316, b=17.981, c=14.331 Å,β=111.85° and Z=4. The coordination is slightly tetrahedrally distorted. Bond lengths and angles are in good agreement with those of the trans modifications. The average Ni—S bond length is 2.167 Å.
    Notes: Bis(1,1-diethyl-3-thiobenzoyl-thioureato)nickel(II) bildet neben zwei kristallinen Modifikationen, in denen die Liganden in trans-Stellung am Nickel-Atom angeordnet sind, auch eine Modifikation mit cis-Stellung der Liganden, deren Struktur mittels Röntgenstrukturanalyse bestätigt wird. Sie kristallisiert in der Raumgruppe P21/c mit den Gitterkonstanten a=11,316, b=17,981, c=14,331 Å,β=111,85° und Z=4. Die Koordination ist leicht tetraedrisch verzerrt. Bindungslängen und-winkel stimmen gut mit denen der trans-Modifikationen überein. Die mittlere Ni—S-Bindungslänge beträgt 2,167 Å.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19916030105
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  • 9
    Electronic Resource
    Electronic Resource
    Zwei- und dreikernige Nickel(II)-chelate bis-bidentater N-AcylselenoharnstoffeProfessor Eberhard Hoyer zum 60. Geburtstage am 26. Mai 1991 gewidmet (1991)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 600 (1991), S. 73-81 
    Details
    ISSN: 0044-2313
    Keywords: Nickel(II) chelates ; syntheses ; crystal structures ; FAB mass spectra ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Di- and Trinuclear Nickel(II) Chelates of Bis-bidentate N-AcylselenoureasBis-bidentate isophthaloyl-bis(selenoureas) form with nickel(II) ions under deprotonating conditions macrocyclic dinuclear metal chelates. This was confirmed by X-ray crystal structure analysis of the cyclo-di[nickel-μ-[1,1,1′,1′-tetraisobutyl-3,3′-iso-phthaloyl-bis-selenoureato(2-)Se,O:O′, Se′]], 2. The compound 2 crystallizes in the monoclinic space group P 21/c with a = 11.673 (1); b = 19.834 (2); c = 13.606 (1) Å; β = 107.45 (1)° and Z = 2. The final R value was R = 0.081 for 3049 observed reflections.Bis-bidentate terephthaloyl-bis(selenoureas) give under the same conditions macrocyclic trinuclear nickel(II) chelates.Both types of the complexes are characterized by FAB mass spectra.
    Notes: Bis-bidentate Isophthaloyl-bis(selenoharnstoffe) bilden mit Nickel(II)-Ionen unter deprotonierenden Bedingungen makrocyclische Zweikernchelate. Dies wurde durch Röntgenkristallstrukturanalyse des cyclo-Di[nickel-μ-[1,1,1,′,1′-tetraisobutyl-3,3′-iso-phthaloyl-bisselenoureaoto(2-)-Se, O:O′, Se′]], 2, bestätigt. Die Verbindung 2 kristallisiert monoklin in der Raumgruppe P 21/c mit den Gitterkonstanten a = 11,673 (1); b = 19,834 (2); c = 13,606 (1) Å; β = 107,45 (1)° und Z = 2. Der abschließende R-Wert betrug R = 0,081 für 3049 beobachtete Reflexe. Bis-bidentate Terephthaloyl-bis(selenoharnstoffe) ergeben unter den gleichen Bedingungen makrocyclische Dreikernnickel(II)-chelate.Beide Komplextypen wurden durch FAB-Massenspektren charakterisiert.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19916000111
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  • 10
    Electronic Resource
    Electronic Resource
    Hydrophil substituierte N-Acyl-thioharnstoffe  -  Säurestärke und Komplexstabilität in Dioxan/WassergemischenProfessor Kurt Dehnicke zum 60. Geburtstage gewidmet (1991)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 595 (1991), S. 35-43 
    Details
    ISSN: 0044-2313
    Keywords: Copper, nickel complexes of N-acyl-thiourea derivatives ; acid dissociation constants ; complex stability constants ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Hydrophilic Substituted N-Acyl-thioureas  -  Acidity and Stability of Complexes in Dioxane/Water MixturesSome derivatives of N-acyl-thioureas containing hydroxy, ester or sulfonic acid groups as well as their copper(II) and nickel(II) complexes have been synthesized. Acid dissociation constants and complex stability constants have been measured pH-potentiometrically in dioxane/water mixtures ranging from 75 to 0% (v/v) dioxane involving main group and subgroup metal ions as well. The partially remarkable changes of the constants in varied solvent mixtures are discussed.
    Notes: Eine Reihe N-Acyl-thioharnstoffe mit Hydroxy-, Ester- oder Sulfonsäuregruppen und ihre Kupfer(II)- und Nickel(II)-Komplexe wurden erstmals synthetisiert und ihre Säuredissoziationskonstanten pH-potentiometrisch in Dioxan/Wassergemischen (Dioxangehalt 75 - 0 Vol.-%) bestimmt. Die Stabilitätskonstanten der Komplexe mit 1-, 2- und 3-wertigen Metallionen aus Haupt- und Nebengruppen des PSE wurden ebenfalls ermittelt. Die z. T. drastischen Veränderungen der Konstanten bei Variation der Lösungsmittelzusammensetzung werden diskutiert.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19915950106
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