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  • Wiley-Blackwell  (5)
  • Springer  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Buchbesprechungen (1967)
    Springer
    European journal of nutrition 8 (1967), S. 75-87 
    Details
    ISSN: 1436-6215
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02022513
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  • 2
    Electronic Resource
    Electronic Resource
    Untersuchungen an Selen-Verbindungen. LXIX. Über das Reaktionsverhalten von Diphenylselendihalogeniden mit Ammoniak, Alkyl- und Silylaminen (1974)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 404 (1974), S. 213-218 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Studies on Selenium Compounds. LXIX. On the Reactivity of Diphenyl Selenium Dihalides with Ammonia, Alkyl- and SilylaminesThe halides Ph2SeX2 (Ph = C6H5; X = Cl, Br) are reduced by NH3, MeNH2 and Me2NH (Me = CH3) at -60°C forming Ph2Se. The reaction of Ph2SeCl2 with Me3SiNMe2 yields Ph2Se(NMe2)Cl, whereas with (Me3Si)2NH the salt [Ph2Se=N=SePh2]Cl is formed. The infrared spectra are presented and discussed.
    Notes: Die Halogenide Ph2SeX2 (Ph = C6H5; X = Cl, Br) werden durch NH3, MeNH2 und Me2NH (Me = CH3) auch bei -60°C zum Ph2Se reduziert. Bei der Umsetzung von Ph2SeCl2 mit Me3SiNMe2 entsteht Ph2Se(NMe2)Cl, während sich mit (Me3Si)2 NH das Salz [Ph2Se = N = SePh2]Cl bildet. Die IR-Spektren werden mitgeteilt und im Hinblick auf die Bindungsverhältnisse diskutiert.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19744040214
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  • 3
    Electronic Resource
    Electronic Resource
    Silylierungsprodukte von Harnstoff-Formaldehyd-Kondensaten (1976)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 318 (1976), S. 697-701 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19763180420
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  • 4
    Electronic Resource
    Electronic Resource
    Untersuchungen an Selen-Verbindungen. LXII. Verbindungen des Typs C6H5SeX3 mit X = OCH3, NO3, CH3CO2 (1973)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 398 (1973), S. 173-178 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Studies on Selenium Compounds. LXII. Compounds of the Type C6H6SeX3 with X = OCHS, NO3, CH3CO2.Reaction of PhSeBr3 (Ph = C6H5) with NaOCH3 forms PhSe(OCH3) 3. Tho infrared spectrum indicates a distorted trigonal bipyramid with two OCH3 groups in axial positions, whereas one OCH3 group, the Ph group and the nonbonding electron pair occupy the equatorial ones. The 1H-NMR spectrum indicates fast exchange of the axial and equatorial positions down to -100°C. The compounds PhSe(ONO2) 3 and PhSe(OCOCH3) 3 are not detectable down to -60°C, Reaction of PhSeBr3 and AgX (X = NO3, CH3CO2) yields only the dissociation products PhSeO(ONO2) + N2O5 and PhSeO(OCOCH3) + (CH3CO2) O, resp. The groups NO3 and CH3CO2 are covalent bonded with the Se atom.
    Notes: PhSeO(OCH3) 3 (Ph = C6H6) entsteht aus PhSeBr3 und NaOCH3. Nach dem IR-Spektrum besitzt die Molekel eine verzerrte trigonal-bipyramidale Struktur, wobei zwei OCH3-Gruppen axial sowie eine OCH3-Gruppe, die Ph-Gruppe und das nicht-bindende Elektronenpaar des Selenatoms äquatorial angeordnet sind. Nach. Aussage des 1H-NME-Spektrums erfolgt auch bei -100°C rascher Austausch der axialen und äquatorialen Positionen. Aus PhSeBr3 und AgX (X = NO3, OH3CO2) entstehen auch bei -60°C nicht die Verbindungen PhSe(ONO2) 3 und PhSe(OCOCH3) 3, sondern deren Zersetzungs-produkte PhSeO(ONO) 2) + N2O5 sowie PhSeO(OCOCH3) + (CH3CO) 2O. Die Nitrat- und Acetatgruppe sind kovalent gebunden.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19733980210
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  • 5
    Electronic Resource
    Electronic Resource
    Untersuchungen an Selen-Verbindungen. LXIII. Uber die Verbindungen C6H5Se(OCH3) 3-nXn [n= 1,2] und (C6H5) 2Se(OCH3) X (1973)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 398 (1973), S. 179-185 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Studies on Selenium Compounds. LXIII. The Compounds C6H5Se(OCH3) 3-nXn[n = 1, 2) and (C6H5) 2Se(OCH3) X.Reaction of C6H5Se(OCH3) 3 and C6H5SeX3 (X = Br, Cl) in molar ratios 2:1 or 1:2 yields C6H5Se(OCH3) 2X and C6H5Se(OCH3) X2. resp. Reaction of C6H5Se(OCH3) 2 Br and AgNO3 yields C6H5Se(OCH3) 2NO3 which forms ionic crystals. (C6H5) 2Se(OCH3) 2 reacts with (C6H5) 2SeX2 forming (C6H5) 2Se(OCH3) X. The compounds are colourless or yellow-crystalline solids. A correlation exists between the number and nature of the substituents, the position of the Se—O and C—O valence vibrations of the Se—OCH3 groups, and the nature of the decomposition processes.
    Notes: Bei der Reaktion von C6H5Se(OCH3) 3 mit C6HsSeX3 (X = Br, Cl) im Molverhältnis 2:1 bzw. 1:2 entstehen C6HsSe(OCH3) 2X bzw. C6H5Se(OCH3) X2. Aus C6HsSe(0CH3) 2Br und AgNO3 entsteht C6H5Se(OCH3) 2NO3. (C6H5) 2Se(OCH3)2reagiert mit (C6H5) 2SeX2 zu {CsH5}2Se(OCH3) X. Alle Verbindungen sind farblose bzw. gelbe kristalline Substanzen. Das Nitrat ist ionogen aufgebaut entsprechend der Formel [C6H5Se(OCH3) 2]+NO3. Es besteht ein Zusammenhang zwischen der Zahl und der Natur der Substituenten, der Lage der Se—O- und C—O-Valenzschwingungsbanden und der Natur der thermischen Zersetzungsprozesse.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19733980211
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  • 6
    Electronic Resource
    Electronic Resource
    Untersuchungen an Selen-Verbindungen. LXIV. Darstellung und Eigenschaften von Säurederivaten von Phenylselen(IV) -Verbindungen (C6Hs) 2SeX2, (C6H5) 3SeX (1973)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 398 (1973), S. 186-192 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Studies on Selenium Compounds. LXIV. Preparation and Properties of Acid Derivatives of Phenylselenium(IV) Compounds (C6H5) 2SeX2 and (C6H5) 3SeX.Reactions of (C6H5) 2SeBr2 and (C6H5) 3SeCl with silver salts of acids are investigated. From (C6H5) 2SeBr3 and AgY (Y = N03, CH3CO3, CF3CO2, 1/2 SO4, CH3SO3, NCO) the compounds (C6H5) 2Se(NO3) 2 (C6H5) 2Se(CH3CO2) 2, (C6Hs) 2Se(CF3CO2) 2, (C6H5) 2SeSO4, (C6H5) 2Se(CH3SO3) 2 and (C6H5) 2Se(NCO) 2 are prepared. They are characterized by solubility, molecular weight and conductivity. Reaction of (C6H5) 3SeCl and AgX (X = NO3, CH3CO2) yields (C6H5) 3SeNO3 and (C6H5) 3SeCH3CO2.
    Notes: Es wird das Reaktionsverhalten von (CsHs) 2SeBr2 und (C6H5) 3SeCl mit Silbersalzen von Säuren untersucht. Aus (C6H5) 2SeBr3 und AgY (Y = NO3, CH3CO2, CF3CO2, 1/2 SO4, CH3SO3, NCO) werden (C6H5) 2Se(NO3) 2 (C6H5) 2Se(CH3CO2) 2, (C6Hs) 2Se(CF3CO2) 2, (C6H5) 2SeSO4, (C6H5) 2Se(CH3SO3) 2 und (C6H5) 2Se(NCO) 2 dargestellt. Die Verbindungen werden durch ihr Löslichkeitsverhalten, durch ihre hydrolytische und thermische Beständigkeit sowie durch ihre Molmasse und ihre Leitfähigkeit charakterisiert. (C6H5) 3SeCl reagiert mit AgX (X = NO3, CH3CO2) zu (C6H5) 3SeNO3 und (C6H5) 3SeCH3CO2.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19733980212
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  • 7
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    Unknown
    Buchbesprechungen (1967)
    Springer
    Details
    Publication Date: 1967-06-01
    Print ISSN: 0044-264X
    Electronic ISSN: 1435-1293
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Medicine
    Published by Springer
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