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  • 1
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A thorough search for electrocatalysts for anodic oxygen evolution from caustic potash solution together with an investigation for the main reasons of ohmic potential drops in the interelectrode gap has lead to a new concept for an advanced medium temperature (150° to 200°C), medium pressure (30 to 100 bars) alkaline water electrolysis. The new concept will allow electrolytic water decomposition at temperatures between 160° and 200°C with current densities of 1 to 1.5 A/cm2 and cell voltages between 1.55 and 1.65 V.
    Additional Material: 7 Ill.
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  • 2
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 1 Ill.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1999 (1999), S. 3455-3458 
    ISSN: 1434-193X
    Keywords: Stereoselectivity ; Carbonyliron Complex ; Oxidation ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The tricarbonyliron complex 2a underwent selective and diastereoselective oxidation with tert-butyl hydroperoxide at room temperature to provide, after decomplexation, the peroxyether 5 which, on reduction, yielded the corres-ponding secondary alcohol 7.
    Additional Material: 1 Ill.
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  • 4
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: During the last fifty years the chemistry of chloroamine has been developed intensively. Many mechanisms for the reaction between chloroamine and ammonia have been forwarded and discarded again. Today, two mechanisms are discussed which so far both cannot be discarded: The SN2-mechanism and the mechanism including nitrogen monohydride as an intermediate. Nitrogen monohydride, prepared hitherto from hydrogen azide, ammonia, and hydrazine can be isolated at lower temperatures in probably oligomeric state.
    Notes: Nach über einem halben Jahrhundert intensiver Entwicklung der Chloraminchemie und nach Aufstellung und Widerlegung vieler Mechanismen für die Chloramin-Ammoniak Reaktion stehen sich heute zwei Mechanismen gegenüber, die beide durch die bisherigen Experimente nicht zu entkräften sind: Der SN2-Mechanismus und der Mechanismus über Stickstoffmonohydrid als Zwischenprodukt. Stickstoffmonohydrid läßt sich bisher aus Hydrogenazid, Ammoniak und Hydrazin erhalten und bei tiefen Temperaturen in wahrscheinlich oligomerem Zustand ausfrieren.
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 313 (1961), S. 37-47 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: According to the method of Rice, Freamo, and Grelecki solid chloroamine has been decomposed at -190 °C by ultraviolet irradiation. The blue product formed is stable below -150 °C; it is already known from the analogous decomposition of hydrogen azide, and its formation can be understood only by the primary formation of nitrogen monohydride.  -  This result is supported by the identification of hydrogen cyanate during the thermal decomposition of gaseous chloroamine in the presence of carbon mon oxide (5 to 10 Torr, 500 °C). Under the same conditions, hydrazine too produces hydrogen cyanate.  -  Considering the result of Wannagat and Kohnen, who showed nitrogen monohydride and ammonia to form hydrazine, it follows that it is possible to synthesize hydrazine from chloroamine and ammonia via nitrogen monohydride as an intermediate.
    Notes: In Anlehnung an die Methodik von Rice, Freamo und Grelecki wurde festes Chloramin bei -190 °C durch ultraviolette Strahlung zersetzt. Das entstehende blaue Produkt, beständig unterhalb -150 °C, ist bereits durch die entsprechende Zersetzung des Hydrogenazids bekannt; seine Bildung ist nur durch primäres Auftreten von Stickstoffmonohydrid zu erklären.  -  Dieses Ergebnis wird durch den Nachweis von Hydrogencyanat im Anschluß an die thermische Zersetzung gasförmigen Chloramins in Gegenwart von Kohlenmonoxid (5 bis 10 Torr, 500 °C) bekräftigt. Auch Hydrazin liefert unter diesen Bedingungen Hydrogencyanat.  -  Unter Berücksichtigung des Befundes von Wannagat und Kohnen, daß Stickstoffmonohydrid mit Ammoniak zu Hydrazin reagieren kann, folgt, daß es ein experimentell gangbarer Weg ist, Hydrazin aus Chloramin und Ammoniak über Stickstoffmonohydrid als Zwischenprodukt zu synthetisieren.
    Additional Material: 3 Ill.
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  • 6
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Infrared and RAMAN spectra of 14NCl3 and 15NCl3 dissolved in CCl4 or n-Hexane have been investigated in the region 4000 to 200 cm-1. Assuming C3v symmetry, force constants for the nitrogen trichloride molecule are calculated using the WILSON FG-Matrix method.
    Notes: Die Infrarotspektren von 14NCl3 und 15NCl3, gelöst in CCl4 bzw. n-Hexan, wurden im Bereich zwischen 4 000 und 200 cm-1 aufgenommen. RAMAN-Spektren beider Verbindungen in CCl4 wurden mit Hilfe eines Laser-RAMAN-Gerätes (Erregerfrequenz 5145 Å) registriert. Unter Annahme eines plausiblen Molekülmodelles der Symmetrie C3v wurde mit Hilfe der WILSONschen FG-Matrix-Methode ein vollständiger Satz von Kraftkonstanten (General Valence Force Field) berechnet.
    Additional Material: 6 Ill.
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 378 (1970), S. 37-48 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Colourless phosphorus is volatile with CCl4 vapour. In the presence of oxygen, phosphorus vapour in gaseous CCl4 is only oxidised to a negligible extent. Quenching of phosphorus/CCl4 vapour mixture results in the formation of conglomerates of colourless phosphorus having molar masses up to 8200 (≙ 66 P4 molecules). Such conglomerates are oxidised by oxygen. The oxidation products exhibit an atomic ration P : 0 ≍ 2 : 3 being, however, no polymeric forms of P4O6 (as supposed by BLASER), but probably polymeric cross  -  linked mixed oxides with a statistical oxygen distribution.
    Notes: Farbloser Phosphor ist mit Tetrachlorkohlenstoff dampfflüchtig. Mit Sauerstoff erfolgt in Gegenwart von Tetrachlorkohlenstoffdampf nur eine unwesentliche Oxydation des Phosphordampfes. Beim Abschrecken des Dampfgemisches bilden sich Konglomerate von farblosem Phosphor entsprechend mittleren Teilchengewichten bis zu 8200. Solche Konglomerate werden durch Sauerstoff oxydiert, Die Oxydationsprodukte zeigen ein Phosphor-Sauerstoffverhältnis von ca. 2 : 3. Sie sind nicht, wie BLASER annahm, Polymere des Phosphor(III)-oxid, P4O6, sondern stellen wahrscheinlich polymere, vernetzte Mischoxide mit statistischer Sauerstoffverteilung dar.
    Additional Material: 6 Ill.
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 57 (1985), S. 614-616 
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 4 Ill.
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 576 (1989), S. 225-228 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reaction of (CH3)2 Te with CF3I: Preparation and Properties of [(CH3)2TeCF3]IThe irradiation of a mixture of (CH3)2 Te and CF3I at low temperature yields [(CH3)2TeCF3]I. From the thermal decomposition as well as in polar solvents CH3TeCF3 and CH3I are formed. Attempts to prepare bis- or tris(trifluoromethyl)tellurium compounds from these reactions failed. [(CH3)2TeCF3]I reacts with salts or acids to form many new derivatives of the composition [(CH3)2TeCF3]X (X = Cl, NO3, 1/2 SO4, OCOCH3, OCOCF3, B(C6H5)4, OC6H2(NO2)[3].
    Notes: Bei tiefer Temperatur unter Bestrahlung reagieren (CH3)2Te und CF3I zu [(CH3)2 TeCF3]I, das bei der thermischen Zersetzung oder in polaren Lösungsmitteln zu CH3TeCF3 und CH3I zerfällt. Die Bildung von Bis- bzw. Tris(trifluormethyl)tellur-Verbindungen gelingt bei diesen Reaktionen nicht. Durch Umsetzung von [(CH3)2TeCF3]I mit Salzen oder Säuren werden zahlreiche neue Derivate der Form [(CH3)2TeCF3]X synthetisiert X = Cl, NO3, 1/2 SO4, OCOCH3, OCOCF3, B(C6H5)4, OC6H2(NO2)3).
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 71 (1959), S. 626-627 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
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