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  • 1
    Electronic Resource
    Electronic Resource
    Ligand exchange reactions between copper(II)- and nickel(II)-chelates of different sulfur- and selenium-containing ligands-II
    Amsterdam : Elsevier
    Journal of Inorganic and Nuclear Chemistry 42 (1980), S. 509-520 
    Details
    ISSN: 0022-1902
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0022-1902(80)80079-0
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  • 2
    Electronic Resource
    Electronic Resource
    Kinetics and equilibria of the copper catalyzed decomposition of hydrogen peroxide activated by pyridine
    Amsterdam : Elsevier
    Journal of Inorganic and Nuclear Chemistry 43 (1981), S. 1101-1105 
    Details
    ISSN: 0022-1902
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0022-1902(81)80194-7
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  • 3
    Electronic Resource
    Electronic Resource
    The thermal behaviour of mon-oxalato-bis-bipyridine-cobalt(III) complexes
    Amsterdam : Elsevier
    Thermochimica Acta 35 (1980), S. 67-72 
    Details
    ISSN: 0040-6031
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0040-6031(80)85022-2
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  • 4
    Electronic Resource
    Electronic Resource
    Thermodynamics of CaCO3 phase transitions (1996)
    Springer
    Journal of thermal analysis and calorimetry 46 (1996), S. 353-359 
    Details
    ISSN: 1572-8943
    Keywords: aqueous solutions ; calcium carbonate polymorphs ; dissolution reactions ; phase transitions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Thermodynamic quantities of the aragonite → calcite transition, were evaluated using results of calorimetric investigations. (1) Dissolution enthalpies of the CaCO3 polymorphs aragonite and calcite measured near room temperature with different calorimeter, (2) the enthalpy of the spontaneous phase transformation obtained by differential scanning calorimetry, (3) heat capacities and heat capacity differences determined with a heat flux calorimeter as well as previously determined, (4)e.m.f. data on Gibbs-energies of the phase transition were processed simultaneously with an optimization routine developed recently. The optimized data set (25°C) given below corresponds reasonably with CODATA recommendations, however, the precision has markedly improved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02135013
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  • 5
    Electronic Resource
    Electronic Resource
    Recent Developments in Integrated Circuit Calorimetry (1999)
    Springer
    Journal of thermal analysis and calorimetry 57 (1999), S. 241-251 
    Details
    ISSN: 1572-8943
    Keywords: enzyme catalised reactions ; inhibitors ; integrated thermopiles ; micro calorimeter
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract In the present paper the properties of a new class of calorimeters, so called integrated circuit calorimeters (IC calorimeters) are discussed. IC calorimeters are constructed on the basis of micro-sized silicon chips with integrated thermopile and heater. The applicability of integrated circuits for calorimetric purposes strongly depends on their sensitivity and on an optimized area of the sensitive sphere. Thus the sensitivity has to be much higher than that of the heat power transducers of conventional calorimeters. The parameters of different integrated circuits are compared corresponding to their use in calorimeters. Different constructions of IC calorimeters are possible: batch and flow-through calorimeters operating at isoperibol or temperature scanning mode. As an example a batch type IC calorimeter for liquid samples with a resolution in heat measurement of 〉100µJ is described in more detail. The applications of this calorimeter are represented in the paper with the investigation of enzyme catalysed reactions, i.e. the hydrolysis of urea and the oxidation of glucose catalysed by the enzymes glucose oxidase and catalase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010152517237
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  • 6
    Electronic Resource
    Electronic Resource
    Photoakustische Spektroskopie von kristallinen Pyrazolidon-(3)-azomethiniminen. Ein Beitrag zur Klärung der Frage: Inwieweit können Röntgenkristallstrukturdaten auf gelöste Moleküle übertragen werden? (1983)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 325 (1983), S. 1033-1036 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Photoacoustic Spectroscopy of Pyrazolidone-(3)-Azomethineimines in Crystalline State A Contribution to Answer the Question: Is it Allowed Structure Dates Obtained by Single-Crystal X-Ray Structure Analysis to Transfer to Solved Molecules
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19833250623
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  • 7
    Electronic Resource
    Electronic Resource
    Calorimetrische Untersuchungen zur Adduktbildung zwischen Pyridin und Nickel(II)-Chelaten von Monothio-β-diketonen und azaanalogen Liganden (1978)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 445 (1978), S. 13-19 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Calorimetric Investigations of Adduct Formation of Pyridine with Nickel(II) Chelates of Monothio-β-diketone Type LigandsThe thermodynamic functions ΔH°, ΔG°, and ΔS° of adduct formation of pyridine with nickel(II) chelates of monothio-β-diketones, N-disubstituted N′-benzoylthioureas and -selenoureas and N-acylthiobenzamide ligands in benzene have been obtained from calorimetric measurements. The higher stability of the pyridine adducts of the Ni(II) chelates of the azaanalogous ligands of monothio-β-diketones as compared to the Ni(II) chelates of the parent ligands is due to the higher enthalpy values of the former.
    Notes: Aus calorimetrisch bestimmten Reaktionswärmen wurden die thermodynamischen Funktionen ΔG°, ΔH° und ΔS° für die Pyridinanlagerung an Nickel(II)-Chelate mit Monothio-β-diketonen, N-disubstituierten N′-Benzoylthioharnstoffen und -selenoharnstoffen sowie N-Acylthiobenzamiden als Liganden in Benzol bei 298,15 K ermittelt. Der Vergleich der Daten zeigt, daß die größere Stabilität der Pyridinaddukte der azaanalogen Nickelchelate durch größere ΔH° Beträge hervorgerufen wird.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19784450102
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  • 8
    Electronic Resource
    Electronic Resource
    Photokatalytische Systeme. XXVIIIXXVII. Mitt.: D. Rehorek u. R. Wagener, Inorg. Chim. Acta, 33, 129 (1979).. Darstellung, Thermochemie und photochemisches Verhalten von [Co(bipy)2ox]X-KomplexverbindungenProfessor Kurt Issleib zum 60. Geburtstage gewidmet (1979)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 458 (1979), S. 139-150 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Photocatalytical Systems. XXVIII. Preparation, Thermal, and Photochemical Behaviour of [Co(bipy)2ox]X CompoundsThe preparation and characterization (UV/VIS and IR spectra, magnetic and conductivity measurements) as well as the thermal and photochemical behaviour of [Co(bipy)2ox]X complexes (bipy = 2,2′-bipyridine; ox = C2O4-; X- = F, Cl, Br, I, ClO4, BF4, B(C6H5)4, SCN, OCN, HCOO, H3CCOO) are described. The investigation of the thermal behaviour of these mixed ligand complexes shows a significant influence of different anions X in the second coordination sphere on their thermal redox decomposition. The photolysis of [Co(bipy)2ox]X compounds results in carbon dioxide and different cobalt(II) compounds apparently with high quantum yield values. The photolysis mechanism of these mixed ligand complexes will be discussed especially considering the importance of the 1MLCT excited states.
    Notes: Es wird über Darstellung und Charakterisierung (UV/VIS- und IR-Spetren, magnetische und Leitfähigkeitsmessungen) sowie über das thermo- und photochemische Verhalten von Komplexverbindungen des Typs [Co(bipy)2ox]X (bipy = 2,2′-Bipyridyl; ox = C2O4-; X- = F, Cl, Br, I, ClO4, BF4, B(C6H5)4, SCN, OCN, HCOO, H3CCOO) berichtet. Die Untersuchung des thermochemischen Verhaltens dieser Gemischtligandenkomplexe mittels DTA-, DTG- und DSC-Messungen ergibt eine eindeutige Abhängigkeit der Thermoredoxreaktionen von der Art des Anions X in der zweiten Koordinationssphäre. Die Photolyse der [Co(bipy)2ox]X-Verbindungen liefert Kohlendioxid und verschiedene Cobalt(II)-Verbindungen mit vergleichsweise hohen Bruttoquantenausbeuten. Der Photolysemechanismus der Gemischtligandenkomplexe wird diskutiert, wobei vor allem auf die Bedeutung des 1MLCT-angeregten Zustandes eingegangen wird.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19794580120
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  • 9
    Electronic Resource
    Electronic Resource
    Kalorimetrische Untersuchung der Komplexbildung zwischen N-Benzoyl-chalkogeno (O, S, Se) harnstoffen und Metallionen der 4., 5. und 6. Periode des PSE in Dioxan/WassermischungProfessor Eberhard Hoyer zum 60. Geburtstage am 26. Mai 1991 gewidmet (1991)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 600 (1991), S. 37-46 
    Details
    ISSN: 0044-2313
    Keywords: Calorimetry ; complex formation ; N-benzoyl-chalcogeno(O, S, Se)ureas ; main group and subgroup metals ; polarizability ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A Calorimetric Study on Complex Formation of N-Benzoyl-chalcogeno (O, S, Se) ureas and Metal Ions of the 4th, 5th, and 6th Period of the Periodic Table of Elements in Dioxane/Water SolutionEnthalpies of protonation and metal complex formation of 3 analogous N′, N′-diethyl-N-benzoyl-chalcogeno (O, S, Se) ureas have been measured by titration calorimetry. Using known stability constants the reaction entropies have been calculated. The free ligands HL are verified to react as NH-acids which are controlled by entropy. Increasing atomic numbers of the reacting metal ions and of the donor atoms of the ligands heighten the complexation enthalpy. The values of enthalpy can be correlated fairly well with the ionic potential and electric polarizability of the metal ions. The remarkable gain of entropy mainly depends on the high number of lost molecules from the extended solvation shell of the reacting species in the dioxane/water mixture.
    Notes: Protolyse- und Metallkomplexbildungsenthalphien der analogen N′, N′- Diethyl-N-benzoyl-chalcogeno (O, S, Se) harnstoffe wurden titrationskalorimetrisch bestimmt und die zugehörigen Reaktionsentropien berechnet. Die freieren Liganden HL reagieren als NH-Säuren, die Protolyse verläuft entropiekontrolliert. Die Reaktionsenthalpien der Metallkomplexe steigen mit zunehmenden Ordnungszahlen der Metallionen und Donatoratome der Liganden, sie korrelieren mit den Ionenpotentialen und Polarisierbarkeiten der Metallionen. Allgemein hohe Beträge der Reaktionsentropie resultieren aus dem Abbau der im Dioxan/Wassergemisch ausgedehnt vorliegenden Solvathülle der Reaktionspartner und beherrschen in der Mehrzahl der Fälle die Komplexbildung.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19916000106
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