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  • 1
    Electronic Resource
    Electronic Resource
    Molekülstruktur, elektrochemisches verhalten und NK XANES von 1,4-Bis(pyrrol-1-yl-carbonyl)benzol (1997)
    Springer
    Monatshefte für Chemie 128 (1997), S. 217-224 
    Details
    ISSN: 1434-4475
    Keywords: 1,4-bis(pyrrol-1-yl-carbonyl)benzene ; Synthesis ; Molecular structure ; Cyclovoltammetry ; NK XANES
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary The molecular structure and the cyclovoltammetric behaviour of 1,4-bis(pyrrol-1-yl-carbonyl)benzene (1) are described. The X-ray absorption spectrum of1 (NK XANES) is investigated with respect to the N1s → π* transitions in comparison with 1H-pyrrole.
    Notes: Zusammenfassung Die Molekülstruktur und das cyclovoltammetrische Verhalten von 1,4-Bis-(pyrrol-1-yl-carbonyl)benzol (1) werden beschrieben. Das Röntgenabsorptionsspektrum von1 (NK XANES) wird bezüglich der N1s → π*-Übergänge im Vergleich mit 1H-Pyrrol untersucht.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00807887
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  • 2
    Electronic Resource
    Electronic Resource
    S-(N-(Thiocarbamoyl)benzimido)-dithiocarbamidsäureester (1996)
    Springer
    Monatshefte für Chemie 127 (1996), S. 291-296 
    Details
    ISSN: 1434-4475
    Keywords: S-(N-(Thiocarbamoyl)benzimido)dithiocarbamic esters ; Synthesis ; 13C NMR spectroscopy ; Side reactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary The synthesis of the title compounds3 (R 1=R 2=C2H5;n-C4H9) by reactions of N-(N′,N′-diethylthiocarbamoyl)benzimidechloride (2) with sodiumdialkyldithiocarbamates (1) in acetone is described. The low yields (〈25%) are caused by the occurrence of side reactions. The structures of the compounds were confirmed by IR,1H and13C NMR, and mass spectroscopy. Side reactions were detected by13C NMR spectroscopy; the results are discussed.
    Notes: Zusammenfassung Die Synthese der Titelverbindungen3 (R 1=R 2=C2H5;n-C4H9) durch Reaktionen von N-(N′,N′-Diethylthiocarbamoyl)-benzimidoylchlorid (2) mit Natriumdialkyldithiocarbamaten (1) in Aceton wird beschrieben. Die niedrigen Ausbeuten (bis 25% d.Th.) sind durch Nebenreaktionen bedingt. Die Strukturen der Verbindungen werden durch IR-,1H-NMR-,13C-NMR-und Massenspektren bestätigt. Nebenreaktionen werden13C-NMR-spektroskopisch verfolgt und die Ergebnisse diskutiert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00813794
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  • 3
    Electronic Resource
    Electronic Resource
    Soil organic matter composition and pesticide bonding in sandy soils in relation to groundwater protection in the Northwest German Lower Plain (1996)
    Springer
    Biology and fertility of soils 23 (1996), S. 266-272 
    Details
    ISSN: 1432-0789
    Keywords: Key words Soil organic matter ; Microbial activity ; Groundwater contamination ; Pesticides ; Spodic horizons ; Landscape planning
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract In sandy gleyic soils with a low groundwater table under arboriculture in Northwest Germany, a wide variation of groundwater pollution by pesticides has been observed. We therefore examined data on microbial activity and soil organic matter composition by wet chemistry, cross-polarization magic-angle spinning and 13C nuclear magnetic resonance, and pyrolysis–field ionization mass spectromy. However, neither microbial activity nor the soil organic matter composition of cultivated topsoils explained the differences in xenobiotic leaching into the groundwater. Data from Anthrosols suggested that these soils have a higher capacity for pesticide bonding because of high amounts of aromatic and carboxylic C moieties in the soil organic matter. However, despite the same pesticide inputs and time of application, the leached output from these soils was higher than that from the Podzols. Initial data from subsoil investigations suggest that the presence of a spodic horizon most likely reduces groundwater pollution by pesticides. Studies to assess fixation capacity and desorption kinetics in Bh horison seem warranted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00335954
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  • 4
    Electronic Resource
    Electronic Resource
    Soil organic matter composition and pesticide bonding in sandy soils in relation to groundwater protection in the Northwest German Lower Plain (1996)
    Springer
    Biology and fertility of soils 23 (1996), S. 266-272 
    Details
    ISSN: 1432-0789
    Keywords: Soil organic matter ; Microbial activity ; Groundwater contamination ; Pesticides ; Spodic horizons ; Landscape planning
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract In sandy gleyic soils with a low groundwater table under arboriculture in Northwest Germany, a wide variation of groundwater pollution by pesticides has been observed. We therefore examined data on microbial activity and soil organic matter composition by wet chemistry, cross-polarization magic-angle spinning and 13C nuclear magnetic resonance, and pyrolysis-field ionization mass spectromy. However, neither microbial activity nor the soil organic matter composition of cultivated topsoils explained the differences in xenobiotic leaching into the groundwater. Data from Anthrosols suggested that these soils have a higher capacity for pesticide bonding because of high amounts of aromatic and carboxylic C moieties in the soil organic matter. However, despite the same pesticide inputs and time of application, the leached output from these soils was higher than that from the Podzols. Initial data from subsoil investigations suggest that the presence of a spodic horizon most likely reduces groundwater pollution by pesticides. Studies to assess fixation capacity and desorption kinetics in Bh horison seem warranted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00335954
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  • 5
    Electronic Resource
    Electronic Resource
    Estergruppen als Liganden in Schwermetallchelaten. III. Komplexbildung mit Estern der o-Mercaptobenzoesäure und der o-Aminobenzoesäure (1967)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 350 (1967), S. 27-34 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Transition metal ions form crystalline chelates with the methylester of o-mercaptobenzoic acid. The suggested ligand behaviour as a β-thioxoketone with fixed thioenol structure is supported by IR-spectroscopic measurements. The stability of the nickel(II) chelate has been determined by ligand exchange with pyridine and ethylenediamine. Copper(II) chloride and nitrate or perchlorate form 1:1 and 1:2 complexes, respectively, with the methylester of o-aminobenzoic acid, which have been isolated and compared with the mercapto compounds.
    Notes: Übergangsmetallionen reagieren mit o-Mercaptobenzoesäuremethylester unter Bildung Kristalliner Komplexe. IR-spektroskopische Untersuchungen bestätigten die Vermutung, daß sich der Ligand wie ein β-Thioxoketon mit fixierter Thioenolstruktur verhält. Durch Ligandenaustausch gegen Pyridin und Äthylendiamin wurde die Stabilität des Bis-(o-mercaptobenzoesäuremethylester)-nickel(II) untersucht. Zum Vergleich wurden vom o-Aminobenzoesäuremethylester ein 1:1-Komplex mit Kupfer(II)-chlorid und 1:2-Komplexe mit Kupfer(II)-nitrat bzw. -perchlorat dargestellt und die Verschiebungen der C=O-Valenzfrequenz diskutiert.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19673500105
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  • 6
    Electronic Resource
    Electronic Resource
    ESCA-Untersuchungen an Schwermetallchelaten substituierter N-Acyl-thio- und -selenoharnstoffe (1977)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 432 (1977), S. 275-279 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: ESCA Investigations on Heavy Metal Chelates of Substituted N-acyl-thio- and -selenoureasN-acylthio- and -selenoureas give as 1,3-dichalcogenketones stable chelates of heavy metals, which are easy to synthesize. From the measurement of the chemical shifts of the N1s-, S2p- or Se3p- and metal nl-ESCA lines follows, that the bonding between the ligand and the central atom involves a σ-bond of oxygen and a donor bond of sulfur and selenium, with a decrease of the electronic density on S or Se, resp. The appearence of two N1s-signals can be explained by deprotonation, which is necessary for the formation of the complex.
    Notes: Die N-Acyl-thio- und -selenoharnstoffe bilden als 1,3-Dichalkogenketone relativ einfach zugängliche stabile Schwermetallchelate. Aus der Messung der chemischen Verschiebung der N 1s-, S 2p-, bzw. Se 3p- und Schwermetall nl-ESCA-Linien kann man den Schluß ziehen, daß die σ-Bindung des Zentralatoms über den Sauerstoff erfolgt. Die S- und Se-Atome gehen eine dative Bindung ein, wobei sich ihre Elektronendichte erniedrigt. Das Auftreten zweier N-Signale läßt sich durch die bei der Komplexbildung erforderliche Deprotonierung verstehen.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19774320139
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  • 7
    Electronic Resource
    Electronic Resource
    Chelatkomplexe mit N-Benzoylthiobenzamid, N-Benzoylbenzamid und N-Thiobenzoylbenzamidin (1977)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 434 (1977), S. 16-28 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Metal Chelates with N-Benzoylthiobenzamide, N-Benzoylbenzamide, and N-ThiobenzoylbenzamidineN-Benzoylthiobenzamide, 1, N-benzoylbenzamide, 2, and N-thiobenzoylbenzamidine-hydrochloride, 3, yield neutral complexes with numerous metal ions which have been characterized by i.r., electronic, and mass spectra as well as magnetic measurements. Compared with the CH2-analogous monothiodibenzoylmethane, H-MTDBM, the isosteric NH group in 1 preferentially influences the properties of the free ligand, e. g. tautomerism, configuration, acidity. ESCA data are used for the discussion of structures and bonding situations of the ligands and its metal complexes.
    Notes: N-Benzoylthiobenzamid, 1, N-Benzoylbenzamid, 2, und N-Thiobenzoyl-benzamidinhydrochlorid, 3, geben mit zahlreichen Metallionen Neutralkomplexe, die durch IR-, UV/VIS- und Massenspektren sowie magnetische Messungen charakterisiert werden. Verglichen mit dem CH2-analogen Monothiodibenzoylmethan, H-MTDBM, wirkt sich die isostere NH-Gruppe in 1 vorwiegend auf die Eigenschaften des freien Liganden (Tautomerie, Konfiguration, Azidität) aus. ESCA-Spektren werden zur Struktur- und Bindungsinterpretation bei Liganden und Metallkomplexen herangezogen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19774340102
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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
    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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  • 10
    Electronic Resource
    Electronic Resource
    Bestimmung der Katalytischem Wirksamkeit von N-Benzoyl-thioharnstoffderivaten in der Jod-Azid-Reaktion in einem System von Konkurrenzreaktionen (1978)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 446 (1978), S. 216-226 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Determination of the Catalytic Activity of N-Benzoylthiourea Derivatives in the Iodine-Azide Reaction in a System of Competitive ReactionsIn the determination of catalytic activity of sulfur containing compounds using the azide/iodine reaction the catalyst is oxidised to an inactive form in a side reaction with iodine. Using a system of competitive reactions (reaction between ascorbic acid and iodine), in which the concentration of iodine is always kept very low during the measurement it is possible to overcome this difficulty. In such a system sulfide is catalytically active during a considerable part of the measurement period. With this method it is possible to recognize differences in the structure - action behaviour of the investigated catalysts (N-Benzoylthioureas) and to correlate the catalytic activity with the constitution. For comparison the qualitative azide/iodine test and a method to check photographic sensitivity was chosen.
    Notes: Die Bestimmung der Katalytischen Aktivität schwefelhaltiger Verbindungen mit Hilfe der Jod-Azid-Reaktion wird durch die in einer Nebenreaktion erfolgende Oxydation der Katalysatoren durch überschüssiges Jod stark gestört. Durch Einbeziehung einer Konkurrenzreaktion zwischen Ascorbinsäure und Jod kann die freie Jodkonzentration im Reaktionsgemisch sehr niedrig gehalten werden. so daß eine Desaktivierung der untersuchten Katalysatoren (N-Benzoylthioharnstoffderivate) kaum erfolgt. Dadurch ist es möglich, Unterschiede im Struktur/Wirkungsverhalten der einzelnen Verbindungen zu erkennen und die katalytische Aktivität mit der Konstitution zu korrelieren. Zum Vergleich werden der qualitative Jod-Azid-Test und ein sensitometrisches Prüfverfahren herangezogen.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19784460122
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