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  • 1
    Electronic Resource
    Electronic Resource
    A New Route to Iminoarsanes (2000)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 2000 (2000), S. 165-168 
    Details
    ISSN: 1434-1948
    Keywords: Arsenic ; Imino compound ; Hydrazinoiminoarsane ; Aminoiminoarsane ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Dehydrohalogenation of (2,4,6-tri-tert-butylphenylamino)chloro[tris(trimethylsilyl)hydrazino]arsane (3) or [tert-butyl(trimethylsilyl)amino]chloro(2,4,6-tri-tert-butylphenylamino)arsane (4) with DBU yields novel stable compounds containing an As-N double bond, (2,4,6-tri-tert-butylphenylimino)[tris(trimethylsilylhydrazino]arsane) (5) and [tert-butyl(trimethylsilyl)amino](2,4,6-tri-tert-butylphenylimino)arsane (6). The structure of 5 was confirmed by an X-ray structure determination.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Fast chromatographic separation techniques as competitors to chemical and biochemical sensor systems (1994)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 349 (1994), S. 338-345 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Fast chromatographic methods, e.g. chromatography with supercritical fluids, ion chromatography and especially capillary electrophoresis, are important competitors of chemical sensors in environmental monitoring and process control. These methods show high selectivity and low interferences and it is possible to determine several parameters within a single chromatographic run. In order to show the potential and limitation of sensor systems and chromatographic separation methods in environmental analysis this review is limited to applications in this field. With regard to practical problems a comparison of ion chromatography (IC), capillary electrophoresis (CE) and electrochemical sensors is given for a special example, the ion analysis in waste water. Authentic water samples with a high surfactant content from a car-wash are examined, proving the suitability of IC, CE and electrochemical sensors in terms of specifity, sensitivity, reproducibility, analysis time and calibration linearity. The results show that the chromatographic methods are useful techniques in water analysis, yielding good sensitivity, high resolution and short analysis times. In comparison the chemical sensor also shows short analysis times, good sensitivity and a simple instrumental set-up. The disadvantage is the lack of selectivity and the instability of the sensor signal, when the sensor is exposed to the extremely complex matrix. Good results could only be achieved by pretreatment of the sample solution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00326596
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  • 3
    Electronic Resource
    Electronic Resource
    Über die Reaktion von S.S-Dimethyl-sulfodiimin mit Kaliumamid in flüssigem Ammoniak (1969)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 102 (1969), S. 1020-1027 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Einwirkung von Kaliumamid auf Dimethylsulfodiimin (1) in fl. NH3 verläuft zwischen -70 und 0° unter Salzbildung. Ein Mono- und ein Dikaliumsalz von 1 werden isoliert und beschrieben. Im Autoklaven reagieren beide Stoffe zwischen 60 und 100° unter Methanabspaltung. Dabei entsteht das Aza-Analoge der Schwefelsäure, Diaminoschwefeldiimid. das als Trikalium-tetraazasulfat (5) ausfällt.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19691020336
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  • 4
    Electronic Resource
    Electronic Resource
    Über die unterschiedliche Ammonolyse von S-Methyl- und S-Äthyl-Gruppen in den S. S-Dialkyl-sulfodiiminen (1969)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 102 (1969), S. 3769-3774 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Einwirkung von Kaliumamid auf S.S-Diäthyl-sulfodiimin (1) und S-Methyl-S-äthyl-sulfodiimin (6) in fl. NH3 verläuft zwischen -70 und 0° unter Salzbildung. Im Autoklaven erfolgt zwischen 100 und 110° Spaltung der C—S-Bindungen, bei der die Methylgruppe grundsätzlich als Methan, eine der Äthylgruppen dagegen als Äthylamin austritt. Das S.S-Diäthyl-sulfodiimin wird dabei zum Aza-Analogon der dischwefligen Säure umgesetzt, das in Form seines Pentakaliumsalzes (5) ausfällt.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19691021120
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  • 5
    Electronic Resource
    Electronic Resource
    Die Ammonolyse von Organylarsoranen (1975)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 108 (1975), S. 1518-1526 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Ammonolysis of OrganylarsoranesReaction of pentaphenylarsorane and iminotribenzylarsorane with potassium amide in liquid ammonia gives, via a series of intermediates, the aza-analogue of arsenic acid, isolated as potassium salt (4). The nucleophilic attack of amide ions on organylarsoranes takes place at lower temperatures than in the case of analogue phosphorus compounds. For the ammonolysis of iminotribenzylarsorane a reaction mechanism different from that of the corresponding phosphorane is deduced.
    Notes: Die Reaktion von Pentaphenylarsoran und Iminotribenzylarsoran mit Kaliumamid in flüssigem Ammoniak führt über verschiedene Zwischenstufen zum Aza-Analogen der Arsensäure in Form eines Kaliumsalzes (4). Der nucleophile Angriff der Amid-Ionen auf Organylarsorane erfolgt bei niedrigeren Temperaturen als im Fall der analogen Phosphorverbindungen. Für die Ammonolyse des Iminotribenzylarsorans wird ein von der Reaktion des entsprechenden Phosphorans verschiedener Mechanismus abgeleitet.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19751080520
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  • 6
    Electronic Resource
    Electronic Resource
    Die Ammonolyse von S.S-Dialkyl-sulfimiden (1971)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 2241-2245 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Ammonolysis of S.S-DialkylsulfimidesThe reaction of potassium amide with S.S-dialkylsulfimides in liquid ammonia was investigated. At -78° S.S-dimethylsulfimide reacts to give the potassium salt, while at + 100° in an autoclave it loses methane and a pentapotassium pentaazadisulfite (3) is formed. S.S-diethylsulfimide even at low temperature splits off one ethyl group in form of ethylene. The other reaction product is the potassium salt of ethanesulfenamide (5), which decomposes easily to give nitrogen, ammonia, and potassium ethanethiolate.
    Notes: Die Einwirkung von Kaliumamid auf S.S-Dialkyl-sulfimide in flüssigem NH3 wird untersucht. Bei -78° bildet S.S-Dimethyl-sulfimid (1) lediglich ein Kaliumsalz, während es bei 100° im Autoklaven unter Abspaltung beider Methylgruppen als Methan in Pentakalium-pentaazadisulfit (3) übergeht. S.S-Diäthyl-sulfimid spaltet schon bei tiefer Temperatur eine Äthylgruppe als Äthylen ab. Als weiteres Reaktionsprodukt entsteht das Kaliumsalz des Äthansulfenamids (5), das leicht in Stickstoff, Ammoniak und Kalium-äthylmercaptid zerfällt.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19711040726
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  • 7
    Electronic Resource
    Electronic Resource
    Die Ammonolyse von Alkansulfono-bis(methylimid)-methylamiden (1970)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 103 (1970), S. 2157-2160 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Ammonolysis of Alkanesulfono-bis(methylimide)methylamidesWith potassium amide in liquid ammonia alkanesulfono-bis(methylimide)methylamides (1) form potassium salts (4). The potassium salt 4a of methanesulfono-bis(methylimide)methylamide is stable against potassium amide up to 120°C, whereas ethanesulfono-bis(methyl-imide)methylamide is completely destroyed after an ammonolytic split of the C—S bond. Ethyl- and methylamine, sulfide and cyanide are formed. The reaction mechanism of this decomposition process is discussed.
    Notes: Bei der Einwirkung von Kaliumamid auf Alkansulfono-bis(methylimid)-methylamide (1) in fl. NH3 entstehen Kaliumsalze (4). Im Unterschied zu dem auch bei 120° gegen Kaliumamid stabilen Kaliumsalz 4a des Methansulfono-bis(methylimid)-methylamids erfolgt beim Äthansulfono-bis(methylimid)-methylamid nach der ammonolytischen Spaltung der C—S-Bindung ein vollständiger Zerfall des Moleküls. Dabei entstehen Äthyl- und Methylamin, Sulfid und Cyanid. Der Reaktionsmechanismus dieser Zerfallsreaktion wird diskutiert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19701030721
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  • 8
    Electronic Resource
    Electronic Resource
    Zur Synthese kovalenter Stickstoffverbindungen des zwei-und vierwertigen Zinns (1976)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 109 (1976), S. 1797-1802 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis of Covalent Nitrogen compounds with Di-and Tetravalent TinDi-tert-butylbis(tert-butyllithioamino)stannane (2) reacts with tin (II) chloride to form the fourmembered ring 3, the first cyclodistannazane containing di-and tetravalent tin. The corresponding reaction of 2 with dichloromethane gives no carbocyclic compound 4 but the secondary bis(alkylamino) stannane 1 and polymers. The ammonolysis of the chloro(silylamino)stannane 6 yields as main products the cyclotristannazane 5 and the N, N′-disilylated secondary diaminostannane 7 besides different silicon-nitrogen compounds.
    Notes: Di-tert-butylbis(tert-butyllithioaminostannan) (2) reagiert mit Zinn (II)-chlorid zum Vierring 3, dem ersten Cyclodistannazan mit zwei-und vierwertigem Zinn. Die entsprechende Umsetzung von 2 mit Dichlormethan führt überraschend nicht zum Carbocyclus 4 sondern zur Bildung des sekundären Bis(alkylamino)stannans 1 und polymeren Stoffgemischen. Bei der Ammonolyse des Chlor-(silylamino)stannans6 erhält man neben verschiedenen Silicium-Stickstoffverbindungen haupt-sächlich das Cyclotristannazan 5 sowie das N, N′-disilylierte sekundäre Diaminostannan 7.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19761090523
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  • 9
    Electronic Resource
    Electronic Resource
    Eliminierung von Olefinen aus Iminotriorganylphosphoranen im Ammonosystem (1979)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 112 (1979), S. 1756-1762 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Elimination of Olefins from Iminotriorganylphosphoranes in Liquid Ammonia SolutionIn the presence of potassium amide some iminotriorganylphosphoranes (1,2,5-7) react under elimination of olefins. The mechanism of this reaction is discussed.
    Notes: Bei Einwirkung von Kaliumamid in flüssigem Ammoniak spalten einige Iminotriorganylphosphorane (1,2,5-7) im Sinne einer Eliminierungsreaktion Olefin ab. Der Reaktionsmechanismus wird diskutiert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19791120526
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  • 10
    Electronic Resource
    Electronic Resource
    Reaktionen von Iminotriorganylarsoranen im Ammonosystem (1980)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 113 (1980), S. 2928-2938 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions of Iminotriorganylarsoranes in the Ammono SystemThe reaction of the iminotriorganylarsoranes 1-4 with potassium amide in liquid ammonia depends on organyl groups bonded to arsenic. As types of reaction nucleophilic displacement of organyl groups by amide ions and cleavage of arsenic-carbon bonds leading to alkene elimination are found.
    Notes: Die Reaktion der Iminotriorganylarsorane 1-4 mit Kaliumamid in flüss. Ammoniak wird durch die an Arsen gebundenen Organylreste bestimmt. Als Reaktionstypen treten die nucleophile Verdrängung von Organylgruppen durch Amid-Ionen und die Spaltung von As - C-Bindungen unter Eliminierung von Alkenen auf.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19801130910
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