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  • 1
    Electronic Resource
    Electronic Resource
    Zur Struktur von Trithiatriazinen (1990)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 123 (1990), S. 2117-2122 
    Details
    ISSN: 0009-2940
    Keywords: 1λ4,3λ4,5λ4-Trithiatriazines ; Anomeric effect ; Antiaromaticity ; Calculations, ab initio, MNDO ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The Structure of TrithiatriazinesMNDO and ab initio calculations have shown that the structure of trithiatriazines [(RSN)3, where R = F, Cl, {H}] is influenced by the anomeric effect and by antiaromaticity of the ring for electron pairs in axial positions. These calculations are supported by a joint electron diffraction and microwave structure determination of (NSF)3 in the gas phase.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19901231106
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  • 2
    Electronic Resource
    Electronic Resource
    Zum anomeren Effekt bei Dithiatriazinen (1990)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 123 (1990), S. 2123-2127 
    Details
    ISSN: 0009-2940
    Keywords: 1λ4,3λ4-Dithiatriazines ; Calculations, MNDO ; Anomeric effect ; Electron diffraction ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The Anomeric Effect in DithiatriazinesFrom (CF3CN3S2)n (1) and XeF2, Br2, or (CF3)2NO* the corresponding S,S-substituted dithiatriazines CF3CN3S2F2 (2), CF3CN3S2Br2 (3), and CF3CN3S2[ON(CF3)2]2 (4) are prepared. An electron diffraction study of 2 in the gas phase results in a slightly aplanar 6-membered ring with chair conformation and both S-F bonds in axial position. MNDO calculations show that the position of the substituents at the sulfur atoms is strongly dependent on these substituents and on the ring geometry. The cis preference is the result of an anomeric effect.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19901231107
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  • 3
    Electronic Resource
    Electronic Resource
    Über die-Synthese und Molekülstruktur von CH3M(SiH3)3 (M=Si, Ge) (1993)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 665-668 
    Details
    ISSN: 0009-2940
    Keywords: 2-Isotetrasilanylsodium salt ; Trisilylgermyl(alkali metal) salt ; 2-Methylisotetrasilane ; Methyltrisilylgermane ; Electron diffraction ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis and Molecular Structure of CH3M(SiH3)3 (M=Si, Ge)A solution of 2-isotetrasilanylsodium (1a) was obtained in good yield from silane and sodium under special conditions. Methylation of 1a with methyl p1-toluenesulfonate yields 2-methylisotetrasilane (1b). The corresponding methyltrisilylgermane (2b) was synthesized via (K, Cs)Ge(SiH3)3 (2a) resulting from the reaction of cesium trichlorogermanide with KSiH3 followed by methylation. The molecular structures of 1a and 1b were determined by electron diffraction analyses.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19931260317
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  • 4
    Electronic Resource
    Electronic Resource
    Fluorthiatriazine (1991)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 1347-1352 
    Details
    ISSN: 0009-2940
    Keywords: 1α4,2,4,6-Thiatriazines, preparation, structures ; 1α4,2,4,6-Thiatriazinium cations ; Calculations, MNDO ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: FluorothiatriazinesFrom the reaction of (ClCN)2(ClSN) (1) with AgAsF6 in liquid SO2 (ClCN)2(SN)⊕ AsF⊖06 (2) is obtained in quantitative yield. With CsF 2 gives (ClCN)2(FSN) (3), which slowly dismutates at room temperature to form (ClCN)(FCN)(FSN) (4) and 1. Fluorination of 1 with SbF3 yields (FCN)2(FSN) (5). With AsF5 5 forms the salt (FCN)2(SN)⊕ AsF⊖ (6). The cation of 6 is transformed by NOCl or CsBr into the corresponding neutral derivatives (FCN)2(ClSN) (7) and (FCN)2(BrSN) (8), respectively. The gas-phase structure of 5 was determined by electron diffraction. The influence of the different exocyclic substituents on the bond properties in this ring system is explained by means of MNDO calculations.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19911240606
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  • 5
    Electronic Resource
    Electronic Resource
    Reaktive E=C(p-p)π-Systeme, XXXVII. Pentafluorethanselenol: Synthese, Spektren und Gasphasen-StrukturHerrn Professor Wolfgang Sawodny zum 60. Geburtstag gewidmet. (1994)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 127 (1994), S. 647-650 
    Details
    ISSN: 0009-2940
    Keywords: Ethaneselenol, pentafluoro-, IR, Raman, NMR, electron diffraction ; ab initio Calculation ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reactive E=C(p-p)π Systems, XXXVII[1]. - Pentafluoroethaneselenol: Synthesis, Spectra, and Gas-Phase StructureHerrn Professor Wolfgang Sawodny zum 60. Geburtstag gewidmet.Pentafluoroethaneselenol HSeC2F5 (1) and its deuterated analogue DSeC2F5 (2) are obtained in moderate yields by cleavage of the diselane (SeC2F5)2 with Me3SnH and Me3SnD, respectively. Complete characterization of the labile compounds was accomplished by spectroscopic investigations (IR, Raman, MS; 1H, 13C, 19F, 77Se NMR). The molecular structure was determined by electron diffraction in the gas phase together with ab initio calculations.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19941270411
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  • 6
    Electronic Resource
    Electronic Resource
    Fluor- und FluoroxodithietaneHerrn Professor Anton Meller zum 60. Geburtstag gewidmet. (1992)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 125 (1992), S. 535-539 
    Details
    ISSN: 0009-2940
    Keywords: Dithietanes, fluoro- and fluorooxo-; formation of, cleavage with halogen fluorides, gas phase structure ; Lewis acids, containing fluorine ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Fluoro- and Fluorooxodithietanes (1) was isolated from the reaction of 2,2,4,4-tetrafluoro-1,3-dithietane (3) with CIF in an unpassivated monelcylinder. The hydrolysis of 1 gives (2): the trans derivative (2b) and the cis isomer (2a) are formed in a 4:1 ratio. (7) is oxidized by CIF at room temperature to give the known (8) in 87% yield. At 50°C from 8 and (9) is formed besides the ring cleavage products CF3SO2CF2SF4Cl (10) and CF3SO2CF2SF5 (11). The gasphase structure of 9 (e.d.) is described. (5) and (13) coordinate by the oxygen of the SO group to AsF5, with an unstable sulfonium salt is formed, while from the reaction of AsF5 and SbF5 with 8 (15 a, b, M = As, Sb) are isolated.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19921250302
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  • 7
    Electronic Resource
    Electronic Resource
    The gas-phase structure of bis(fluorosulfonyl)difluoromethane, (SO2F)2CF2 (1994)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 822-826 
    Details
    ISSN: 0044-2313
    Keywords: Bis(fluorosulfonyl)difluoromethane ; gas-phase structure ; conformation ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Die Gasphasen-Struktur von Bis(fluorosulfonyl)difluormethan, (SO2F)2CF2Es wird über neue Syntheseverfahren und das Infrarotspektrum von Bis(fluorsulfonyl) Difluormethan, (SO2F)2CF2 berichtet. Die geometrische Struktur und die Konformationseigenschaften dieser Verbindung wurden mittels der Elektronenbeugung an Gasen untersucht. Je nach Stellung der zwei SO2F Gruppen können vier Konformere mit unterschiedlichen Symmetrien auftreten: C2v Symmetrie, falls beide S—F Bindungen auf Lücke zu CF2 stehen, C2 oder Cs Symmetrie, falls eine S=O Bindung jeder SO2F Gruppe auf Lücke zu CF2 steht und C1 Symmetrie, falls eine S—F und eine S=O Bindung auf Lücke zu CF2 stehen. Die experimentellen Elektronenbeugungsintensitäten können mit einem C1 Konformeren oder mit einem Gemisch aus C2v, C2 und Cs Konformeren im Verhältnis 3:2:5 nahezu gleich gut angepaßt werden. Die folgenden geometrischen Parameter (ra Abstände und ∠α Winkel mit 3σ Fehlergrenzen) wurden erhalten: C—F = 1,340(6) Å, S=O = 1,412(2) Å, S—F = 1,550(3) Å, C—S = 1,848(4) Å, S—C—S = 113,6(7)°, F—C—F = 110,0(10)°, O=S=O = 124,6(18)°, C—S—F = 96,5(16)° und C—S=O = 108,4(14)°.
    Notes: New synthetic pathways and the infrared spectrum of bis(fluorosulfonyl)difluoromethane, (SO2F)2CF2, are reported. The geometric structure and conformational properties of the title compound have been studied by gas electron diffraction. Depending on the rotational position of the two SO2F groups, four conformers with different symmetries can occur in this compound: C2v symmetry, if both S—F bonds stagger the CF2 group. C2 or Cs symmetry, if one S=O bond of each group staggers the CF2 group. The experimental electron diffraction intensities can be fitted equally well with a C1 conformer or with a mixture of C2v, C2 and Cs conformers, in a ratio of 3:2:5. The following geometric parameters (ra distances, ∠α angles with 3σ uncertainties) were derived: C—F = 1.340(6) Å, S=O = 1.412(2) Å, S—F = 1.550(3) Å, C—S = 1.848(4) Å, S—C—S = 113.6(7)°, F—C—F = 110.0(10)°, O=S=O = 124.6(18)°, C—S—F = 96.5(16)° and C—S=O = 108.4(14)°.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19946200512
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