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  • 1
    Electronic Resource
    Electronic Resource
    Modeling of the heat-transfer process in a differential scanning calorimeter (1992)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 38 (1992), S. 438-444 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The model developed predicts a priori potential errors associated with the energy trace recorded by an isoperibol differential power scanning calorimeter in the measurement of heat of adsorption of H2 on Pt and Pd catalysts. The uptake of H2 by the catalyst sample was approximated by a diffusion-limited quasi-steady-state moving boundary model. This approximation is valid only if the parameter [(adsorption capacity of cat. sample)/(inlet conc. of H2)] is extremely large (∼ 24). The effect of flow rate, amount of H2 adsorbed, sink temperature, and the thermal conductivity of the adsorbate mixture was examined. Model predictions indicate that the error in the energy trace recorded by the DSC is appreciable: if a large difference exists between the thermal conductivity of the inert carrier, Ar (K = 0.017 J/m·K·s), and the adsorbate, H2 (k = 0.174 J/m·K·s); if the heat sink temperature is much lower (∼ 90 K) than the measurement temperature. However, these errors can be eliminated by matching the thermal conductivity of the inert carrier and adsorbate, such as He (k = 0.143 J/m·K·s) and H2 (k = 0.174 J/m·K·s). The results agree well with the experimental observations of Vannice et al. (1987) on high-purity Pt and Pd powder and supported Pt catalysts, if the H2 uptake by the catalyst sample in the calorimeter is small (≤2 μmol).
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690380312
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  • 2
    Electronic Resource
    Electronic Resource
    Nitrosyl Rhenium Complexes: Iodonitrosyl derivatives (1981)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 477 (1981), S. 229-234 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Nitrosyl-Rhenium-Komplexe: Iodonitrosyl-DerivateRe(NO)I52- wurde als Cs+- Rb+- und dipyH+-Salz isoliert. Außerdem wurden das nicht elektrolytische Re(NO)I3L (L = 1,10-Phenanthrolin und 2,2′-Dipyridyl) und [Re(NO)IL2]PtCl6 dargestellt. Aus einer Lösung von Re(NO)(OH)3 in HI wurde eine Verbindung der Formel Re(H2O)(NO)(OH)I2 isoliert, deren Pyrolyse Re(H2O)0.5(NO)(OH)2I ergab. Bestimmung der elektronischen und IR-Spektren sowie der magnetischen Momente wurde durchgeführt. Die Eigenschaften der Iod-Derivate werden mit den entsprechenden der Fluor-, Chlor- und Brom-Komplexe verglichen.
    Notes: The anionic Re(NO)I52- has been isolated as salts of Cs+, Rb+, and dipyH+. The nonelectrolytic Re(NO)I3L (L stands for 1,10-phenanthroline and 2,2′-dipyridyl) and cationic [Re(NO)IL2]PtCl6 have also been prepared. From a solution of Re(NO)(OH)3 in HI, compound of formula Re(H2O)(NO)(OH)I2 has been isolated, pyrolysis of which yielded Re(H2O)0.5(NO)(OH)2I. Measurements of electronic and i.r. spectra and magnetic moments have been carried out. The properties of the iodo derivatives have been compared with those of the corresponding fluoro, chloro and bromo complexes.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19814770632
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  • 3
    Electronic Resource
    Electronic Resource
    Studies on the Hydrolysis of Nitrosotrichlororhenium (1977)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 431 (1977), S. 268-272 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Untersuchungen zur Hydrolyse des NitrosotrichlororheniumsHydratisiertes Nitrosotrichlororhenium, Re(NO)Cl3 · xH2O, kann nicht zur wasserfreien Verbindung getrocknet werden. Dabei wird HCl abgegeben und [Re(H2O)(NO)(OH)Cl2] bzw. [Re(H2O)0,5(NO)(OH)2Cl] in Abhängigkeit von den Bedingungen gebildet. Potentiometrische Untersuchungen zeigten, daß in wäßrig-äthanolischen Lösungen der Trichlorokomplex sehr schnell zwei Äquivalente Wasserstoffionen frei setzt, während die Abspaltung der Chloridionen zeitabhängig ist. Zwei Äquivalente an Chloridionen sind jedoch im Gleichgewichtsystem vorhanden. Das dritte Chloratom ist fest an das Rheniumatom gebunden. Eine Struktur mit Chlor-Brückenbindung wird vorgeschlagen.
    Notes: Hydrated nitrosotrichlororhenium, Re(NO)Cl3 · sH2O cannot be desiccated to the anhydrous product. Hydrogen chloride is expelled and [Re(H2O)(NO)(OH)Cl2] and [Re(H2O)0.5(NO) (OH)2Cl] are produced depending on the conditions of the reactions. Potentiometric studies have indicated that in aqueous ethanolic solutions, the trichloro complex rapidly liberates two equivalents of hydrogen ions while the release of chloride ions are time dependent. Two equivalents of chloride ions are, however, present in a equilibrium system. The third chlorine atom is rigidly bound to the rhenium atom. A chloride bridged structure has been proposed.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19774310130
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  • 4
    Electronic Resource
    Electronic Resource
    Chloronitrosyl complexes of rhenium (1972)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 387 (1972), S. 265-270 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Herstellung und Eigenschaften einiger sehr stabiler Nitrosylkomplexe des Rheniums werden beschrieben: ReCl3(NO), Re(OH)3(NO), M2ReCl5(NO), wobei M = K, Cs, NH4. Sie sind den entsprechenden Rutheniumkomplexen analog. Die Oxydationsstufe der Gruppe ReNO ist +3, wobei die des Re-Atoms allein aber nicht ermittelt werden konnte. Die νNO-Valenzschwingung liegt im Bereich 1710-1920 cm-;1. Das obige Kalium- und Cäsium-salz sind bei Raumtemperatur schwach paramagnetisch.
    Notes: Preparation and properties of several highly stable nitroso complexes of rhenium viz. ReCl3(NO), Re(OH)3(NO)3 M2ReCl5(NO) where M is Cs, K and NH4 are described. These are analogous to the corresponding ruthenium complexes. The oxidation number of the ‘ReNO’ unit as a whole, is +3 but that of the rhenium atom cannot be determined. The nitric oxide stretching band lies within the range of 1710-1920 cm-1. The cesium and potassium salts are weakly paramagnetic at room temperature.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19723870214
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  • 5
    Electronic Resource
    Electronic Resource
    Pyridino Nitrosyl Complexes of Rhenium (1972)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 388 (1972), S. 184-188 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Es werden Pyridinderivate von ReCl3(NO) beschrieben (Formeln siehe „Abstract“); sie sind beständig und fest. Analytische Zusammensetzung, IR und UV-Daten, elektrische Leitfähigkeit und magnetische Momente werden mitgeteilt.
    Notes: Preparation of pyridine derivatives of ReCl3(NO) viz. (pyH)2ReCl5(NO), pyH[ReCl4py(NO)], H[ReCl4py(NO)], K[ReCl4py(NO)], Ag[ReCl4py(NO)] and [ReCl3py2(NO)] are described. All these compounds are stable solids. They are characterised by their analytical composition, spectral data, conductance and magnetic moment values.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19723880212
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  • 6
    Electronic Resource
    Electronic Resource
    Thermal study on some Nitrosyl Complexes of Rhenium (1972)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 388 (1972), S. 189-192 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Die thermische Zersetzung der Verbindungen (MH2)[ReCl5(NO)] wurde untersucht (M = Pyridin, 2,2′-Dipyridyl bzw. 1,10-Phenanthrolin). Ausgangsverbindungen und Zersetzungsprodukte siehe „Abstract“. Die freie Säure H[ReCl4Py(NO)] zerfällt bei 200°C in [ReCl3(NO)] und [ReCl3Py2(NO)].
    Notes: Study of the thermal decomposition of (MH)2[ReCl5(NO)] where M stands for pyridine, 2,2′ dipyridyl and 1,10 phenanthroline in carbon dioxide atmosphere is described. Pyridine compound produces pyH[ReCl4py(NO)] at 250°C and [ReCl3py2(NO)] at 400°C. Dipyridyl and phenanthroline compounds produce [ReCl3(dipy)(NO)] and [ReCl3(phen)(NO)] at 210°C and 220°C respectively. The acid H[ReCl4py(NO)] decomposes under similar condition at 200°C to produce [ReCl3(NO)] and [ReCl3py2(NO)] in equivalent quantities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19723880213
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  • 7
    Electronic Resource
    Electronic Resource
    Chemistry of Trivalent Niobium (1973)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 398 (1973), S. 312-316 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chemie des dreiwertigen Niobs.Die stabile Verbindung KNb(SO4 · 4 H2O mit der Oxydationsstufe Nb3+ ist rein dargestellt und durch ihre chemischen Eigenschaften, UV-, optisches und IR-Spektrum sowie auch polarographisch charakterisiert worden.
    Notes: A stable compound of lower valent niobium viz. KKb(SO4)2 · 4 H2O in which Nb is in +3 oxidation state has been isolated pure. It has been characterised by its chemical properties, UV, visible and i.r. spectral studies and also by polarographic investigations.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19733980311
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  • 8
    Electronic Resource
    Electronic Resource
    Reaction of nitric oxide with tetravalent rhenium compounds (1973)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 401 (1973), S. 212-216 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reaktion von NO mit vierwertigen RheniumverbindungenStickoxid reagiert mit ReO2 bei 70-80°C quantitativ unter Bildung von Re(NO)(OH)3, ReO4- und NH4+· [Re(NO)Cl5]2- und ReO4- werden im stöchiometrischen Verhältnis sowohl bei der Reaktion von NO mit einer Suspension von ReO2 in 6 n HCl als auch in wäßrig-äthanolischer Suspension mit einem Gemisch von NO und HCl bei 70-80°C gebildet. Beim Überleiten von NO bei 220°C über Phenanthroliniumhexa-halogenorhenat(IV) wird Nitrosylhalogenid, Halogenwasserstoff und [Re(NO)(phen)Cl3] bzw. [Re(NO)(phen)Br3] gebildet.
    Notes: Nitric oxide reacts with hydrated ReO2 in aqueous suspension at 70-80°C to produce quantitatively Re(NO)(OH)3, ReO4- and NH4+. [Re(NO)Cl5]2- and ReO4- are produced in stoichiometric quantities by the reaction of either NO with ReO2 suspension in 6 N HCl or by the action of a mixture of NO and HCl with an aqueous ethanolic or aqueous suspension of ReO2 at 70-80°C. Passage of NO over 1,10-phenanthrolinium hexahalorhenate(IV) at 220°C produces nitrosyl halide, hydrogen halide and [Re(NO) (phen)Cl3] or [Re(NO)(phen)Br3].
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19734010213
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  • 9
    Electronic Resource
    Electronic Resource
    Nitrosorhenium complexes: Studies on Nitrosotrihydroxo Rhenium (1978)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 445 (1978), S. 245-250 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Nitrosorhenium -Komplexe: Untersuchungen an Nitrosotrihydroxo -RheniumDie Reaktion von Re(NO)Cl3 mit Basen ist unter verschiedenen Bedingungen untersucht worden. Die Entstehung von Re(H2O)(NO)(OH)3 konnte nachgewiesen werden; als Endprodukt bei Basenüberschuß konnte Tl[Re(NO)(OH)4] isoliert werden. Eigenschaften und IR -Spektren werden mitgeteilt.
    Notes: Reaction of Re(NO)Cl3 with bases have been studied under different experimental conditions. Formation of Re(H2O)(NO)(OH)3 have been demonstrated and the ultimate product with excess base has been isolated as Tl[Re(NO)(OH)4]. Their i. r. spectral data has been analysed and properties described.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19784450132
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  • 10
    Electronic Resource
    Electronic Resource
    Nitrosyl Rhenium Complexes Syntheses, Properties, and Structures of Oxalato Derivatives (1983)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 502 (1983), S. 225-232 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Nitrosylrhenium-Komplexe: Synthesen, Eigenschaften und Strukturen von OxalatoderivatenDie freie Säure H[Re(NO)(C2O4)(OH)2H2O] wurde durch Umsetzung von Re(NO)(OH)3 = H2O mit Oxalsäure in wäßrigem Medium erhalten. Die K+-, NH4+- und Pb2+-Salze der Säure wurden isoliert sowie nichtelektrolytische Diimino-Derivate, Re(NO)(C2O4)X = L (X = 1, 10-Phenanthrolin-2,2′-Dipyridyl; L = OH-, Cl-) synthetisiert. Die Komplexe werden elementaranalytisch, spektroskopisch (UV-VIS, IR), magnetisch und durch Leitfähigkeitsdaten charakterisiert und ihre Strukturen vorgeschlagen.
    Notes: The free acid, H[Re(NO)(C2O4)(OH)2(H2O)] has been prepared from the reaction of Re(NO)(OH)3 = H2O with oxalic acid in aqueous medium. The K+, NH4+ and Pb2+ salts of the acid have been isolated. Nonelectrolytic diimino derivatives, Re(NO)(C2O4)X · L (X = 1, 10-phenanthroline, 2,2′-dipyridyl; L = OH-, Cl-) have been synthesized. The complexes have been characterised through elemental analyses, spectral (u.v., vis., i.r.) properties, magnetic and conductance data and their structures are proposed.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19835020731
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