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  • 1
    Electronic Resource
    Electronic Resource
    1-Amino-4-aryl-2(1H)-pyrimidinthione: Acidität und Komplexbildung mit Mn(II), Co(II), Ni(II), Zn(II), Cd(II), Pb(II) und Ag(I) (1994)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 336 (1994), S. 500-505 
    Details
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1-Amino-4-aryl-2(1H)-pyrimidinethiones: Acidity and Complex Formation with Nonferrous Metal Ions and Ag(I)Acid dissociation constants of new 2, 3 and already known 1 substituted 1-amino-4-aryl-2(1H)-pyrimidinethiones and stability constants of their nonferrous metal ion and silver complexes have been measured pH-potentiometrically in a 75% (v/v) mixture of dioxane/water. The influence of the substituents on pKa- and lgβn-values is discussed. The X-ray structure analysis of bis[1-(4-toluenesulfonamido)-4-(4-tolyl)-2(1H)-pyrimidinethionatol]-nickel(II)5 proves that pyrimidinethiones coordinate via their thione sulphur and aminonitrogen. However, the bond lengths are not levelled in the chelating ring.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19943360604
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  • 2
    Electronic Resource
    Electronic Resource
    D. C. Harris, Lehrbuch der quantitativen Analyse (Aus dem Amerikanischen von G. Werner, C. Vogt and U. Zeller, Leipzig, übersetzt), Vieweg, Wiesbaden, 4. Auflage, 1178 S., 1998, DM 148,-, ISBN 3-528-06756-X (1998)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 340 (1998), S. 587-587 
    Details
    ISSN: 0941-1216
    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.19983400620
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  • 3
    Electronic Resource
    Electronic Resource
    Kristall- und Molekülstruktur des 4,5-Dibenzoylseleno-1,3-diselenol-2-selonHerrn Prof. Dr. Rolf Borsdorf zum 60. Geburtstag gewidmet (1992)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 334 (1992), S. 72-75 
    Details
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Crystal and Molecular Structure of 4,5-Dibenzoylseleno-1,3-diselenole-2-seloneThe crystal and molecular structure of 4,5-dibenzoylseleno-1,3-diselenole-2-selone is described. The compound crystallizes in the monoclinic space group P21/c with a = 9.704, b = 10.839, c = 17.726 [Å], β = 93.43° and Z = 4. The structure is compared with that of the analogous „all-sulfur“ compound. The crystal packing of the heterocycle studied shows surprisingly short intermolecular distances between neighbouring selone groups.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19923340113
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  • 4
    Electronic Resource
    Electronic Resource
    1,3-Dithiol-anellierte Kronenverbindungen (1994)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 336 (1994), S. 177-179 
    Details
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1,3-Dithiole Annelated Crown Compounds
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19943360217
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  • 5
    Electronic Resource
    Electronic Resource
    Koordination von Silber(I) durch N,N-Diethyl-N′-benzoylthioharnstoff in Lösung und in festem ZustandProfessor Lothar Beyer zum 60. Geburtstag gewidmet (1997)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 135-140 
    Details
    ISSN: 0044-2313
    Keywords: Ag1 complexes ; N-acyl thiourea complexes ; potentiometry ; stability constants ; X-ray structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Coordination of Silver(I) by N,N-Diethyl-N′-benzoyl Thiourea in Solution and in the Solid StateSilver(I) reacts in dioxane/water solution with N,N-diethyl-N′-benzoyl thiourea HL to give cationic, neutral, and anionic complexes depending on the pH value, the molar ratio of the reactants and their concentrations. The ligand in these complexes coordinates in various ways. Complex stability constants have been determined by pAg and pH potentiometry. Representative complexes have been isolated in the solid state. One of them is a cyclic tetramer [AgL]4 the structure of which has been determined by X-ray diffraction.
    Notes: Silber(I) bildet mit N,N-Diethyl-N′-benzoyl-thioharnstoff HL in Dioxan/Wasser-Mischung, abhängig vom pH-Wert, dem molaren Verhältnis der Reaktanden und ihren Konzentrationen, kationische, neutrale und anionische Komplexe, in denen der Ligand in unterschiedlicher Weise koordiniert. Für diese Komplexe wurden pAg- und pH-potentiometrisch Stabilitätskonstanten bestimmt. Repräsentative Komplexe konnten in festem Zustand isoliert werden, darunter ein cyclischer Komplex [AgL]4, dessen Struktur durch Röntgenbeugung bestimmt wurde.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19976230122
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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
    Dithiazoliumsalze mit Halometallaten - Synthese und Struktur von 3-Diethylamino-5-phenyl-1,2,4-dithiazolium-tetrachloro-niccolat(II)Professor Lothar Kolditz zum 60. Geburtstage gewidmet (1989)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 576 (1989), S. 203-214 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Dithiazolium Salts of Halometalates - Synthesis and Structure of 3-Diethylamino-5-phenyl-1,2,4-dithiazolium-tetrachloroniccolate (II)Chlorination of NiII-coordinated 1,1-diethyl-3-benzoyl-thiourea by SOCl2 in acetonitrile yields turquoise 3-diethyl-amino-5-phenyl-1,2,4-dithiazolium-tetrachloroniccolate. Its reduction produces cis-bis-(1,1-diethyl-3-thiobenzoylthioureato)nickel(II). The mechanism of formation as well as the crystal and molecular structure of the title compound are presented.
    Notes: Die Chlorierung von an NiII innerkomplex gebundenem 1,1-Diethyl-3-benzoylthioharnstoff mittels SOCl2 führt in Acetonitril zu türkisem 3-Diethylamino-5-phenyl-1,2,4-dithiazolium-tetrachloroniccolat, aus dem durch Reduktion cis-Bis-(1,1-diethyl-3-thiobenzoyl-thioureato)nickel(II) zugänglich ist. Der Bildungsmechanismus des Dithiazoliumsalzes wird erörtert und die Kristall- und Molekülstrukturanalyse vorgestellt.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19895760123
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  • 8
    Electronic Resource
    Electronic Resource
    Einfluß schwerer Donoratome auf den isotropen g-Wert der ESR-Spektren und Berechnung des Kovalenzgrades der Metall-Ligand-σ-Bindung in Ag(II)-Komplexen mit N-, S- und Se-enthaltenden Liganden (1973)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 399 (1973), S. 199-204 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Effect of Heavy Donor Atoms on the Isotropic g-Value of the EPR Spectra and the Calculation of the Covalency of the Metal-Ligand σ-Bond in Ag(II) Complexes Containing N, S, and Se DonorsUsing the isotropic ligand hyperfine structures of the EPR spectra of planar Ag(II) complexes containing N, S, and Se donor atoms the degree of covalency of the silver-ligand σ-bond has been calculated. The covalency of the metal-ligand bond increases considerably in the order AgN4 〈 AgS4 〈 AgSe4. The strong shift of the isotropic g-values to values near the free-electron g-value, observed in chelates with heavy donor atoms is discussed. This shift is caused by the spin-orbit interaction of the heavy donor atoms and the strong covalency of the metal-ligand bond.
    Notes: Über die isotrope Ligandenhyperfeinstruktur in den ESR-Spektren von planaren Ag(II)-Chelaten mit N, S und Se als Donoratomen wird der Kovalenzgrad der Silber-Ligand-Bindung berechnet. Er nimmt in der Reihenfolge AgN4 〈 AgS4 〈 AgSe4 beträchtlich zu. Die bei den Chelaten mit schweren Donoratomen beobachtete starke Verschiebung des isotropen g-Wertes in Richtung g-Wert des freien Elektrons wird diskutiert. Die Spin-Bahn-Wechselwirkung schwerer Donoratome und die starke Kovalenz der Metall-Ligand-Bindung verursachen gemeinsam die beobachteten g-Verschiebungen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19733990209
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  • 9
    Electronic Resource
    Electronic Resource
    ESR-Untersuchungen an Kupfer(II)-bis(diäthyl-diselenocarbamat) in Zn(II)-und Pd(II)-bis-(diäthyldiselenocarbamat): Zum Einfluß verschiedener Symmetrien der Se4-Koordinationssphäre auf die Parameter des Spin-Hamilton-Operators und die Bindungsverhältnisse (1973)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 401 (1973), S. 295-305 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: EPR Investigations on Copper(II)-bis(diethyl-diselenocarbamate) in Zn(II) and Pd(II)bis(diethyl-diselenocarbamate): The Influence of Different Symmetries of the Se4-Coordination Sphere on the Parameters of the Spin-Hamilton ian and on the Bonding PropertiesEPR investigations on polycrystalline samples of Cu(desc)2 in Pd- and Zn(desc)2 and on single crystals of Cu(desc)2/Zn(desc)2 are reported (desc = diethyldiselenocarbamate). In the EPR spectra the rare case of noncoinciding principal axes of the g- and the Cu-hyperfine structure tensor is observed. The influence of the different coordination geometries in Pd(desc)2 (planar) and Zn(desc)2 (distorted tetrahedron) on the spin-Hamiltonian parameters and the bonding situation is investigated and compared with the parameters obtained from Cu(desc)2/Ni(desc)2. In Cu/Zn(desc)2 a general shift of the g-tensor components to higher g-values is observed indicating a descrease of the covalency in the in-plane- and out-of-plane-π-bonds. The degree of covalency of the ground state-σ-bond remains unchanged neglecting small differences. The x-, y-components of the g-tensor and the angle between the noncoinciding principal axes in the Cu(dsc)2 are found to be very sensitive indicators with respect to direct changes (caused by changes in the ligand field symmetry in the different host lattices) and to indirect changes (caused by variation of the N-alkyl groups in the ligand) in the bonding situation of the 1st coordination sphere.
    Notes: Es wird über ESR-Untersuchungen an polykristallinen Proben von Cu(däsc)2 in Pd(däsc)2 und Zn(däsc)2 sowie an Einkristallen von Cu(däsc)2/Zn(däsc)2 berichtet (däsc = diäthyl-diselenocarbamat). In den ESR-Spektren wird der seltene Fall nichtzusammenfallender Hauptachsen von g- und A-Tensor (Cu-hfs) beobachtet. Der Einfluß der verschiedenen Koordinationsgeometrien in Pd(däsc)2 (planar) und Zn(däsc)2 (verzerrt tetraedrisch) auf die Parameter des Spin-Hamilton-Operators sowie die Bindungsverhältnisse wird untersucht und mit dem System Cu(däsc)2/Ni(däsc)2 verglichen. Im Cu/Zn(däsc)2 wird gegenüber den Cu/Ni, Pd(däsc)2-Systemen eine generelle Verschiebung der g-Tensor-Komponenten zu höheren g-Werten beobachtet, was ein Absinken der Kovalenz der π-Bindungen innerhalb und außerhalb der „Koordinationsebene“ anzeigt. Im Kovalenzgrad der Grundzustands-σ-Bindung werden nur kleine Unterschiede beobachtet. Es wurde gefunden, daß in den Cu(dsc)2 die Winkel zwischen den nichtzusammenfallenden Hauptachsen sowie die x-, y-Komponenten des g-Tensors sehr empfindliche Indikatoren auf direkte Änderungen (Änderungen der Ligandenfeldsymmetrie in den verschiedenen Wirtsgittern) sowie indirekte Änderungen (Variation der N-Alkylgruppen im Liganden) in den Bindungsverhältnissen der 1. Koordinationssphäre sind.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19734010309
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  • 10
    Electronic Resource
    Electronic Resource
    Nitrosyl-Metallkoordinationsverbindungen. I. Synthese und Eigenschaften von Eisen- und Kobaltkomplexen des Typs (1977)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 437 (1977), S. 299-303 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Nitrosyl Metal Coordination Compounds. I. Synthesis and Properties of Iron and Cobalt Complexes of the Type Complex compounds of the type , with M = Fe, Co and thiodibenzoylmethanate (TDBM) and N-(morpholinothiocarbamoyl)-benzamidate (MTBA) have been synthesized. It has been established by means of molecular weigths measurements, IR and ESCA spectroscopy, and magnetic investigations that the iron complex 1 is a sulfur bridged dimeric molecule [Fe(TDBM)2NO]2, where each iron atom has the coordination number six. The cobalt complexes Co(TDBM)2NO, 2, and Co(MTBA)2NO, 3, are both monomeric with square pyramidal structures. The ESCA spectra are in each case in accordance with the formal oxidation number three of the central metal and a negative charged nitrosyl ligand.
    Notes: Komplexverbindungen des Typs , mit M = Fe, Co und Thiodibenzoylmethanat (TDBM) und N-(Morpholinothiocarbamoyl)-benzamidat (MTBA), wurden synthetisiert. Mittels Molmassebestimmung, IR- und ESCA-Spektroskopie sowie magnetochemischen Untersuchungen wurde nachgewiesen, daß der Eisenkomplex 1 als schwefelverbrückter Zweikern-komplex [Fe(TDBM)2NO]2 vorliegt, in dem jedes Eisenatom sechsfach koordiniert ist. Die Kobalt-komplexe Co(TDBM)2NO, 2, und Co(MTBA)2NO, 3, liegen monomer in quadratisch-pyramidaler Struktur vor. In allen Fällen weisen die ESCA-Spektren formal dreiwertige Zentralmetalle mit negativ geladenem Nitrosylliganden aus.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19774370144
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