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  • Wiley-Blackwell  (102)
  • Cambridge University Press  (5)
  • 1995-1999  (91)
  • 1970-1974  (6)
  • 1935-1939  (10)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Regiospecific Hydroxylation of Metallodisilanes of the Iron Group - An Impressive Example of the Transition Metal Effect (1998)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1998 (1998), S. 1585-1587 
    Details
    ISSN: 1434-1948
    Keywords: Metallodisilanes ; Oxofunctionalization ; Metallodisilandiols ; Silanetriols ; Metallosiloxanes ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reaction of the ferriodisilanes C5R5(OC)2Fe-Si2H5 [R = H (1a), Me (1b)] with dimethyldioxirane leads to selective insertion of oxygen into the α-Si-H bonds to yield the ferriodihydroxydisilanes C5R5(OC)2Fe-Si(OH)2-SiH3[R = H (2a), Me (2b)]. Another access to yield 2a is opened by hydrolysis of the dichloro(ferrio)disilane Cp(OC)2Fe-SiCl2-SiH3 (3a). Treatment of the pentachloro(metallo)disilanes C5H5(OC)2Fe-Si2Cl5 (4a) and C5Me5(OC)2Ru-Si2Cl5 (4b) with water results in regiospecific hydroxylation of the β-silicon atom to generate metallodisilanetriols C5R5(OC)2M-SiCl2-Si(OH)3 [M = Fe, R = H (5a); M = Ru, R = Me (5b)]. Controlled condensation of 5b with Me2Si(H)Cl leads to the novel rutheniosiloxane C5Me5(OC)2Ru-SiCl2-Si(OSiMe2H)3 (6).
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Germany and China: A Continental Temptation (1996)
    Cambridge : Cambridge University Press
    The @China quarterly 147 (1996), S. 706-725 
    Details
    ISSN: 0305-7410
    Source: Cambridge Journals Digital Archives
    Topics: Linguistics and Literary Studies , History , Political Science , Sociology , Economics
    Notes: The fact that Reichswehr officers served as advisors to Chiang Kai-shek between 1927 and 1936 and that Hitler, before concluding his anti- Comintern pact with Japan, may have toyed with a Chinese alternative, can only partly be explained by Germany's great power aspirations at the time. Bom powers had been latecomers to global interaction and were rather traditional continental players when compared with Britain or the United States. Both derived their foreign policy claims from a pre-modern and sometimes mythological status.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1017/S0305741000051766
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  • 3
    Electronic Resource
    Electronic Resource
    Marie-luise, Nath: Die Volksrepublik China in Deutschland, Wahrnehmungen, Wissenschaftskonzeptionen und Wirklichkeiten. : Frankfurt am Main:, Peter Lang,, 1995 (1996)
    Cambridge : Cambridge University Press
    The @China quarterly 147 (1996), S. 1007-1009 
    Details
    ISSN: 0305-7410
    Source: Cambridge Journals Digital Archives
    Topics: Linguistics and Literary Studies , History , Political Science , Sociology , Economics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1017/S0305741000052164
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  • 4
    Electronic Resource
    Electronic Resource
    Poly[(S)-(+)-2-methylbutyl]pentylsiloxane (1998)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 36 (1998), S. 169-177 
    Details
    ISSN: 0887-624X
    Keywords: polysiloxane ; hexagonal columnar mesophase ; optically active polymers ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Poly[(S)-(+)-2-methylbutyl]pentylsiloxane has been synthesized by anionic ring opening polymerization of the corresponding strained cyclic trisiloxane \documentclass{article}\pagestyle{empty}\begin{document}$ (D^{\rm{MeBu, Pe}}_{3}) $\end{document} with cryptated lithium (Li+/[211]) as counterion. The polymer did not show the low and high temperature crystalline phases, that are generally found for poly(di-n-alkylsiloxane)s. Instead, the material formed a hexagonal columnar mesophase until it melted around 400°C. MAS and solution 13C- and 29Si-NMR, polarizing microscopy and WAXS indicated an unexpectedly regular chain structure. It was tentatively concluded that the steric interaction of the (S)-(+)-2-methylbutyl side chains introduces sufficient regularity of the tacticity and that the chains tend to adopt a defect helix conformation. On the other hand, DSC showed the presence of a glass transition at -113°C, indicating a high flexibility of the backbone. © 1998 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 36: 169-177, 1998
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Die Einwirkung von Kohlenoxyd auf ammoniakalische Cuprisalzlösungen. II. Mitteilung: Kohlenoxyd und Kupfer-2-amminverbindungen in Gegenwart von metallischem Kupfer (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 224 (1935), S. 130-152 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Absorption von Kohlenoxyd in Cupritetramminsalzlösungen, z. B. Cupritetramminhydroxyd, -carbonat, -chlorid, -sulfat wird durch die Gegenwart metallischen Kupfers außerordentlich beschleunigt.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19352240203
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  • 6
    Electronic Resource
    Electronic Resource
    Die Einwirkung von Kohlenoxyd auf ammoniakalische Cuprisalzlösungen. I. Mitteilung: Kohlenoxyd und Kupfer-2-amminverbindungen unter Ausschluß von metallischem Kupfer (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 224 (1935), S. 113-129 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1. Kohlenoxyd wird von Cupritetramminverbindungen, z. B. Cupritetramminhydroxyd, -carbonat, -acetat, -chlorid, -sulfat, -nitrat, in wäßrig-ammoniakalischen Lösungen aufgenommen unter Bildung von Kohlendioxyd, das zu Carbonat gebunden wird und in der Lösung verbleibt. Die Absorption des Kohlenoxyds, die zunächst langsam vor sich geht, wird dann durch autokatalytische Vorgänge wesentlich beschleunigt. Alles Cuprisalz wird in Cuprosalz übergeführt unter Entfärbung der Lösungen, die schließlich Cuproammincarbonat und dasjenige Cuproamminsalz enthalten, das dem ursprünglich angesetzten Cupriamminsalz entspricht.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19352240202
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  • 7
    Electronic Resource
    Electronic Resource
    Configurational assignment of optically active hydroperoxy homoallylic alcohols and the corresponding diols by circular dichroism and multidimensional gas chromatography (1997)
    New York, NY [u.a.] : Wiley-Blackwell
    Chirality 9 (1997), S. 69-74 
    Details
    ISSN: 0899-0042
    Keywords: diols ; hydroperoxides ; absolute configuration ; exciton coupling ; circular dichroism ; enantiomeric separation ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Allylic hydroperoxides are a class of compounds of versatile synthetic utility. Optically active diastereomeric hydroperoxy homoallylic alcohols and their corresponding diols are easily available through horseradish peroxidase (HRP)-catalyzed kinetic resolution of racemic hydroperoxides. Here we describe the assignment of the absolute configuration of the optically active products and substrates obtained after HRP-catalysis by the circular dichroism exciton chirality method. Moreover, the analytical-scale separation of the enantiomers based on multidimensional gas chromatography on chiral columns is presented. Since the enantiomeric elution order on the ciral columns was constituted, the absolute stereochemistry of optically active allylic diols can easily be deduced by their retention times on β-cyclodextrins. Chirality 9:69-74, 1997. © 1997 Wiley-Liss, Inc.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    A new class of network-polymeric chiral stationary phases (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    Chirality 7 (1995), S. 248-256 
    Details
    ISSN: 0899-0042
    Keywords: chiral discrimination ; chiral stationary phase ; network polymer ; DATD ; hydrogen bonding ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A strategy based on the use of homo bi- and multifunctional building blocks for the synthesis of a new class of network-polymeric chiral stationary phases has been evaluated. The key steps comprise acylation of N,N′-diallyl-L-tartardiamide (DATD) and reaction with a multifunctional hydrosilane, yielding a network polymer incorporating the bifunctional C2-symmetric chiral selector. Covalent bonding to a functionalized silica takes place during the latter process. Many of these chiral sorbents show interesting enantioselective properties toward a wide variety of racemic solutes under normal-phase (hexane-based) conditions. The retention is mainly caused by the hydrogen-bonding ability of the analyte, which is regulated by mobile phase additives like alcohol or ether cosolvents. The most interesting chiral stationary phases, in terms of broad enantioselectivity, were obtained from O,O′-diaryol-DATD-derivatives, particularly those containing the 3,5-dimethylbenzoyl and the 4-(tert-butyl)benzoyl moieties. Since high column efficiencies can be obtained with these chiral sorbents, an α-value of ca. 1.2 is usually sufficient to produce baseline separation. A large number of neutral as well as acidic or basic drug racemates are resolved without derivatization. © 1995 Wiley-Liss, Inc.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/chir.530070411
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  • 9
    Electronic Resource
    Electronic Resource
    Molecularly thin films of metallodendrimers (1998)
    Chichester : Wiley-Blackwell
    Journal of Physical Organic Chemistry 11 (1998), S. 540-545 
    Details
    ISSN: 0894-3230
    Keywords: metallodendrimers ; molecularly thin films ; Chemistry ; Theoretical, Physical and Computational Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A non-covalent synthesis route to assemble metallodendrimers was extended to the fifth generation. Generation four (G4) was characterized by electrospray mass spectrometry. Thin films of generation five (G5) metallodendrimers were studied by tapping mode scanning force microscopy. Both on graphite and on mica spherical particles with a diameter of ca 15 nm were observed. © 1998 John Wiley & Sons, Ltd.
    Additional Material: 6 Ill.
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  • 10
    Electronic Resource
    Electronic Resource
    A solid-state investigation of the desorption/evaporation of hindered phenols from low density polyethylene using FTIR and UV spectroscopy with integrating sphere: The effect of molecular size on the desorption (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 61 (1996), S. 1149-1162 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Low density polyethylene (LDPE) has been investigated with respect to the desorption/evaporation of hindered phenol antioxidants added to the polymer matrix. In this study, Fourier transform infrared and ultraviolet (FTIR and UV) spectroscopy without any extraction or refining steps in the analysis were used to measure the desorption constants. The UV spectrophotometer was equipped with an integrating sphere. The desorption constants, α, of five phenols containing the same 3,5-di-tert-butyl-4-hydroxyphenyl structure, but differing by the length of the hydrocarbon tails, were obtained in the temperature range of 40-100°C. The number of methylene groups in the tail varied between 0 and 17. The temperature-dependence of the phenols could be described by an Arrhenius type relationship. Very large differences in desorption rates were found due to differences in size of the antioxidants. © 1996 John Wiley & Sons, Inc.
    Additional Material: 19 Ill.
    Type of Medium: Electronic Resource
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