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  • Inorganic Chemistry  (7)
  • enthalpy of crystallization  (5)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of solution chemistry 15 (1986), S. 269-282 
    ISSN: 1572-8927
    Keywords: Activity coefficients ; enthalpy of crystallization ; enthalpy of dissolution ; enthalpy of formation ; lithium chloride ; solubility
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The enthalpies of crystallization of LiCl and LiCl·H2O from aqueous solutions at 25°C are reported as measured by a calorimetric method and derived from the previously published concentration dependence of the enthalpy of solution data. The results are compared with those obtained from the concentration dependence of activity coefficients and from the temperature dependence of solubilities.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of solution chemistry 19 (1990), S. 447-455 
    ISSN: 1572-8927
    Keywords: Acetone ; enthalpy of crystallization ; enthalpy of dissolution ; enthalpy of transition ; ion-solvent interaction ; magnesium chloride ; methanol ; N,N-dimethylformamide ; solvation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The crystallization enthalpies of MgCl2 in MgCl2−H2O-cosolvent systems at 25°C were determined calorimetrically as a function of the cosolvent content in the mixed solvent. Methanol, acetone, and N,N-dimethylformamide were employed as cosolvents. The results show the individual cosolvents to have very differently influences on the energy state of the salt in the saturated solution. The most pronounced changes are effected by an increase of the DMF content in the mixed solvent. The intensity of Mg2+-DMF interaction at a higher DMF content in the saturated solution considerably exceeds the Li+-DMF interaction in LiCl solutions.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of solution chemistry 19 (1990), S. 437-446 
    ISSN: 1572-8927
    Keywords: Acetone ; enthalpy of crystallization ; enthalpy of dissolution ; enthalpy of transition ; ion-solvent interaction ; lithium chloride ; methanol ; N,N-dimethylformamide ; solvation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The crystallization enthalpy of LiCl at 25°C in LiCl-H2O-cosolvent systems is determined calorimetrically as a function of the cosolvent content in the mixed solvent. This parameter is used for the investigation of heat phenomena accompanying the solvation of the salt in a saturated solution. The cosolvents employed include methanol, acetone, and N,N-dimethylformamide. The most pronounced change is effected by replacement of water with N,N-dimethylformamide.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of solution chemistry 24 (1995), S. 659-669 
    ISSN: 1572-8927
    Keywords: Ammonium aluminum sulphate dodecahydrate ; enthalpies of solution ; enthalpy of crystallization ; solubility ; vapor pressure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Enthalpies of crystallization of NH4Al(SO4)2·12H2O from aqueous solutions at 25°C, measured using a calorimetric method and determined from previously published data on the concentration dependence of the enthalpy of solution, are reported. The results are compared with the values obtained from the temperature dependence of solubility and from vapor pressure data by using the Williamson equation. The integral and partial molar enthalpies of solution in concentrated and diluted solutions are given.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Journal of solution chemistry 19 (1990), S. 1029-1039 
    ISSN: 1572-8927
    Keywords: Activity coefficients ; enthalpies of solution and hydration ; enthalpy of crystallization ; lithium nitrate ; lithium nitrate trihydrate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The enthalpies of crystallization of LiNO3 and LiNO3−3H2O from aqueous solutions at 25°C, measured by a calorimetric method and determined from the previously published data on the concentration dependence of the enthalpy of solution, are reported. The results are compared with the values obtained from the concentration dependences of the activity coefficients and from the temperature dependences of the solubilities. The enthalpy of solution at infinite dilution and the enthalpy of hydration are given.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 329 (1964), S. 56-67 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The existence of dibromophosphoric acid formed by hydrolysis of phosphoryl bromide in acetone-Water mixtures has been proved by titration and by precipitation of the nitron salt. By condensation of partially hydrolyzed phosphoryl bromide, mixtures of polyphosphoric acids are formed. The end groups of these acids are supposed to be substituted by bromine atoms.
    Notes: Die Existenz der bei der Hydrolyse des Phosphoroxidbromids in Aceton-Wasser-Gemischen gebildeten Dibromophosphorsäure wurde titrimetrisch und durch Fällung des Nitronsalzes bewiesen. Durch Kondensationsreaktionen des partiell hydrolysierten Phosphoroxidbromids entstehen Gemische von Polyphorsäuren, deren Endgruppen wahrscheinlich durch Br-Atome substituiert sind.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Phosphorus Compounds with Adamantane-like Structure. VII. Preparation and Properties of Nonathio CyclotriphosphateReaction of both, P4S10 and P4S9, in liquid ammonia below -33°C yields ammonium nonathio cyclotriphosphate, (NH4)3[P3S9] (I), which crystallizes on cooling to -78°C. On ammonolytic decomposition of I trithio amidophosphate, (NH4)2[PS3(NH2)], is obtained. I reacts with PCl3 re-building the adamantane-like structure of P4S9. Further properties and reactions of I are described.
    Notes: Die Reaktion von P4S10 oder P4S9 mit flüssigem Ammoniak führt unterhalb -33°C zu Ammoniumnonathiocyclotriphosphat, (NH4)3[P3S9] (I), das beim Abkühlen auf -78°C auskristallisiert. Bei der ammonolytischen Spaltung von I entsteht Amidotrithiophosphat, (NH4)2[PS3(NH2)]. Mit PCl3 reagiert I unter Rückbildung der Adamantanstruktur des P4S9. Weitere Eigenschaften und Reaktionen von I werden beschrieben.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 509 (1984), S. 101-110 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Phosphorus Compounds with Adamantane-like Structure. XI. Preparation and Properties of Phosphorus Oxide Sulfides of the General Formula P4S10-n Sn (n = 2-9)The reaction of P4O10 with P4S10 yields a mixture of phosphorus oxide sulfides of the general formula P4O10-nSn. Depending on the molar ratio P4O10: P4S10 in the starting product different amounts of the individual phosphorus oxide sulfides occuring in this reorganization product are formed. Besides the well-known P4O6S4 the compounds P4O7S3, P4O5S5, P4O4S6, P4O3S7, P4O2S8, and P4OS9 occuring for the first time were obtained by fractional distillation or crystallization. The compound P4O8S2 was identified by N.M.R. spectroscopy.
    Notes: Die Reaktion von P4O10 mit P4S10 führt zu einem Gemisch von Phosphoroxidsulfiden der allgemeinen Zusammensetzung P4O10-nSn. Die Anteile der einzelnen Phosphoroxidsulfide in diesem Reorganisationsgemisch lassen sich durch Änderung des Ausgangsmolverhältnisses P4O10/P4S10 variieren. Durch fraktionierte Destillation bzw. Kristallisation wurden neben dem bereits bekannten Oxidsulfid P4O6S4 erstmals die Verbindungen P4O7S3, P4O5S5, P4O4S6, P4O3S7 P4O2S8 und P4OS9 präparativ dargestellt sowie P4O8S2 NMR-spektroskopisch identifiziert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 365 (1969), S. 294-300 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The preparation of bis(ethylacetate)-calcium-difluorophosphate is described. As shown by X-ray single crystal investigations, this compound belongs to the class of coordination polymers having a chain-like double-bridge structure.
    Notes: Die Darstellung des Bis(äthylacetat)-calcium-difluorophosphates Ca[PO2F2]2 · 2 CH3COOC2H5 wird beschrieben und durch röntgenographische Strukturuntersuchung nachgewiesen, daß diese Verbindung zur Gruppe der Koordinationspolymeren mit Doppelbrückenstruktur gehört.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Studies on the Preparation of the Phosphoric Acid Fluoride Pyridinium Betaine, Py · PO2F (Py = Pyridine)Under anhydrous reaction conditions phosphoric acid chloride betaine, Py · PO2Cl (I), does not react with NaF or NaSO2F to the corresponding fluorine compound Py · PO2F (II). Reaction between AsF3 and I gives rise to the formation of compound II which is detectable by N.M.R.In an excess of pyridine POCl2F reacts with P4O10 to a mixture of I and II which are difficult to be separated. In a preparatively simple way II can be obtained by sulfur-oxygen exchange in liquid SO2 starting from dithiophosphoric acid fluoride betaine Py · PS2F.
    Notes: Versuche, ausgehend vom Phosphorsäurechloridpyrididiumbetain, Py · PO2Cl (I), unter wasserfreien Bedingungen durch Cl—F-Austausch das entsprechende Fluoridbetain, Py · PO2F (II), darzustellen, führen bei Verwendung von NaF und Natriumfluorosulfinat nicht zum Ziel, während bei der Reaktion mit AsF3 II im Reaktionsgemisch NMR-spektroskopisch nachgewiesen werden kann. Die Umsetzung von POCl2F mit P4O10 in überschüssigem Pyridin führt zu einem Gemisch aus I und II, aus dem jedoch II nur schwer isolierbar ist. In präparativ einfacher Weise kann II durch Schwefel-Sauerstoff-Austausch aus dem Dithiophosphorsäurefluoridbetain, Py · PS2F, in flüssigem SO2 erhalten werden.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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