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  • 1
    Electronic Resource
    Electronic Resource
    Silicon-Modified Carbohydrate Surfactants V: The Wetting Behaviour of Low-Molecular-Weight Siloxane, Carbosilane, Silane and Polysilane Precursors on Low-Energy Surfaces (1997)
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 11 (1997), S. 645-657 
    Details
    ISSN: 0268-2605
    Keywords: siloxane ; surface tension ; control angle ; interfacial tension ; wetting tension ; Chemistry ; Industrial Chemistry and Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The surface tensions, wetting tensions, contact angles and solid/liquid interfacial tensions of defined siloxanes as well as those of analogous carbosilanes, polysilanes and neopentyl substituted silanes were determined. The wetting experiments were carried out on a glass plate coated with perfluoroalkyl methacrylate (FC 722®). The siloxanes possess the lowest surface tensions. Due to the presence of oxygen atoms in the siloxane backbone, a donor-acceptor portion (γ+/-lv) of the surface tension of about 1-2 mN/m was determined. The solid/liquid interfacial tension also contains a donor-acceptor portion (γ+/-sl). Its value is almost identical to that of γ+/-lv. The γ+/-sl differences between individual molecules of the same surface tension are responsible for contact angle differences of up to 4°. © 1997 John Wiley & Sons, Ltd.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 2
    Electronic Resource
    Electronic Resource
    Tetramethyldisilan-1,2-diyl-verbrückte Dicyclopentadienyl-und Diindenylmetalldichloride der 4. Gruppe - Kristallstruktur von (1996)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 1806-1810 
    Details
    ISSN: 0044-2313
    Keywords: Metallocene dichlorides, bridged cyclopentadienyl and indenyl compounds ; crystal structure ; 1H ; 13C ; 29Si n.m.r., and MS spectra ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Tetramethyldisilane-1,2-diyl bridged Dicyclopentadienyl and Diindenyl Metal Dichlorides of the Group 4 Metals - Crystal Structure of Dicyclopentadienyl and diindenyl metal dichlorides of the type Cp′—SiMe2SiMe2—Cp′MCl2 (Cp′ = C5H4, M = Ti (1), Zr (2), Hf (3); Cp′ = C9H7, M = Zr (4), Hf (5)) were synthesized and characterized by means of their 1H, 13C, 29Si-n.m.r., MS, and IR spectra. The crystal structure of 2 was determined.
    Notes: Dicyclopentadienyl- und Diindenylmetalldichloride des Typs Cp′—Me2Si—Me2Si—Cp′MCl2(Cp′ = C5H4; M = Ti(1), Zr (2), Hf (3); Cp′ = C9H7; M = Zr (4), Hf (5)) wurden synthetisiert und mittels ihrer 1H-, 13C- und 29Si-NMR-Spektren sowie MS- und IR-Spektren charakterisiert. Die Kristallstruktur von 2 wurde ermittelt.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19966221028
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  • 3
    Electronic Resource
    Electronic Resource
    Schwingungungsspektren und Normalkoordinatenanalysen verschieden substituierter Diphosphane (1978)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 443 (1978), S. 125-134 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Vibrational Spectra and Normal-coordinate Analysis of DiphosphanesThe i.r. and Raman spectra of Ph2PPPH2, (C6D5))2PP(C6D5)2, PhBrPPBrPh, PhJPPJPh, and J2PPJ2 were recorded. A normal-coordinate analysis using a three-mass model of the phenyl group was carried out, including the molecules P2F4 [1], P2Cl4 [2], and P2(CH3)4 [3]. Published spectra of these molecules have been used. The influence of the substituents on the PP stretching force constant has been studied. The arrangement of the substituents according to their effect on the PP force constant leads to a series different from that found in the corresponding disilanes [4].
    Notes: Die IR- und Raman-Spektren von Ph2PPPH2, (C6D5)2PP(C6D5)2, PhBrPPBrPh, PhJPPJPh und P2J4 wurden aufgenommen und Normalkoordinatenanalysen mittels eines Dreimassen-Phenylmodells durchgeführt. Mit Hilfe der Literaturspektren wurden Schwingungsberechnungen an P2F4 [1], P2Cl4 [2] und P2(CH34 [3] vorgenommen. Der Einfluß der Substituenten auf die Phosphor-Phosphor-Kraftkonstante konnte so an einer größeren Anzahl von Verbindungen untersucht werden. Die Reihung der Substituenten nach ihrem Einfluß auf die PP-Kraftkonstante unterscheidet sich von jener der Disilane [4].
    Additional Material: 8 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19784430113
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  • 4
    Electronic Resource
    Electronic Resource
    Schwingungsspektren und Kraftkonstanten verschiedener Phosphan-Borane (1979)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 448 (1979), S. 161-166 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Vibrational Spectra and Force-Constants of Some Phosphine-BoranesThe IR und Raman spectra of Ph3P—BH3, Ph3P—BD3, and (C6D5)3P—BH3 were recorded. A normal-coordinate analysis has been carried out, using a simplified model of the phenyl group. With the aid of published spectra, a vibrational analysis of F3PBH3 and H3PBH3 has been performed, using 10B - 11B-isotopic-shift data. A linear relationship between the 31P - 11B-N.M.R. coupling constant and the PB-valence-force constant has been found.
    Notes: Die IR- und Raman-Spektren von Ph3P—BH3, Ph3P—BD3 und (C6D5)3P—BH3 wurden aufgenommen und eine Normalkoordinatenanylse mit einem vereinfachten Phenylmodell durchgeführt. Unter Verwendung der Literaturspektren wurden Schwingungsberechnungen an F3PBH3 und H3PBH3 miteinbezogen, wobei auch 10B - 11B-Isotopenverschiebungen berücksichtigt wurden. Es ergibt sich ein linearer Zusammenhang zwischen der Kopplungskonstante J(31P - 11B) und der PB-Valenzkraftkonstante.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19794480119
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  • 5
    Electronic Resource
    Electronic Resource
    Darstellung und spektroskopische Eigenschaften einiger Perbromierter und periodierter Oligosilane (1982)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 488 (1982), S. 27-37 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation and Spectroscopie Properties of Some Perbromo- and PeriodooligosilanesThe cleavage of octaphenylcyclotetrasilane and decaphenylcyclopentasilane with Iodine, phosphorus pentabromide and bromine and the successive reaction with HBr/AlBr3 or HI/AlI3 give n-Si4Br10, n-Si5Br12, n-Si4I10, and n-Si5I12. Their IR and Raman spectra are discussed with the aid of a normal coordinate analysis. The spectra of the cyclic iodosilanes Si4I8, Si5I10, and Si6I12, prepared previously [1], are included in the discussion.
    Notes: Die Spaltung von Oktaphenylcyclotetrasilan und Dekaphenylcyclopentasilan mit Iod, Phosphorpentabromid oder Brom und anschließende Umsetzung mit HBr/AlBr3 bzw. HI/AlI3 erlaubt die Darstellung der bisher unbekannten Halogensilane n-Si4Br10, n-Si4I10, n-Si5Br12 und n-Si5I12. Ihre IR- und Raman-Spektren werden mit Hilfe einer Normalkoordinatenanalyse diskutiert. Jene der kürzlich dargestellten [1] cyclischen Iodsilane Si4I8, Si5I10 und Si6I12 werden mit einbezogen.
    Additional Material: 7 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19824880103
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