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  • 1
    Electronic Resource
    Electronic Resource
    Thioketyls. 7. Anisotropic ESR parameters and line width variations in the thio- and selenoketyl series (1980)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 84 (1980), S. 3638-3646 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100463a029
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  • 2
    Electronic Resource
    Electronic Resource
    Thioketyls. 3. Radical anions of thioketenes (1979)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 83 (1979), S. 738-741 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100469a020
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  • 3
    Electronic Resource
    Electronic Resource
    On discrete and continuous norms in Paley-Wiener spaces and consequences for exponential frames (1999)
    Springer
    The journal of Fourier analysis and applications 5 (1999), S. 193-201 
    Details
    ISSN: 1531-5851
    Keywords: Primary 30D15 ; 42C15 ; Secondary 30D10 ; 42C30 ; Paley-Wiener space ; entire functions of exponential type ; exponential frames ; discrete norms ; sampling theorem
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract It is well known that for certain sequences {tn}n∈ℤ the usual Lp norm ∥·∥p in the Paley-Wiener space PW τ p is equivalent to the discrete norm ‖f‖p,{tn}:=(∑ n=−∞ ∞ |f(tn)|p)1/p for 1 ≤ p = 〈 ∞ and ‖f‖∞,{tn}:=sup n∈ℤ|f(tn| for p=∞). We estimate ∥f∥p from above by C∥f∥p, n and give an explicit value for C depending only on p, τ, and characteristic parameters of the sequence {tn}n∈ℤ. This includes an explicit lower frame bound in a famous theorem of Duffin and Schaeffer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01261609
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  • 4
    Electronic Resource
    Electronic Resource
    Electroreduction of organic compounds. 31. Electroreduction of 2- and 3-Chlorodibenzofuran in Deuterated Methanol (1998)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 340 (1998), S. 430-436 
    Details
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The cathodic reduction of dibenzofuran (2), 2-chlorodibenzofuran (4), and 3-chlorodibenzofuran (1) in deuterated methanol is investigated. The Birch-type reduction product 1,4-dibenzofuran (3) is formed from 1 via 2, whereas 2-chloro-1,4-dihydrodibenzofuran (5) is obtained as by-product besides 3 from 4 as starting compound. Deuterium is only incorporated into the reduction products if CH3OD or CD3OD but not if CD3OH are used. This observation is strongly indicative of a polar mechanism involving protonation rather than a radical mechanism with hydrogen atom abstraction to be operative.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19983400505
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  • 5
    Electronic Resource
    Electronic Resource
    Differential pulse polarography — a convenient method for quantitative determination of 2-bromo-2-bromomethyl-pentanedinitrile (“1,2-dibromo-2,4-dicyanobutane”) [1] (1988)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 332 (1988), S. 823-823 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01129788
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  • 6
    Electronic Resource
    Electronic Resource
    Kristall- und Molekülstruktur des Oxalsäure-bis(di-tert-butylmethylesters) (1976)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 109 (1976), S. 761-768 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal and Molecular Structure of Bis(di-tert-butylmethyl) OxalateThe structure of the title compound (4) has been determined from X-ray data and refined to R = 0.048. 4 crystallizes in the space group C2/c with lattice parameters a = 23.599(4) Å, b = 12827(1) Å, C = 15.272(2) Å and β = 108.89(2)°. - The molecule exhibits the unusual Z-configuration. Bond lenghts and angles show no particularities with the exception of the central C—C-bond which appears significantly short (a = 1.531 Å).
    Notes: Die Struktur der Titelsubstanz (4) wurde röntgenorgraphisch bestimmt und bis zu einem R von 0.048 verfeinert. 4 kristallisiert in der Raumgruppe C2/c mit den Zellparametern a = 23.599(4) Å, b = 12.827 (1) Å, c = 15.272(2) Å und β = 108.89(2)°. - Das Molekül liegt in der ungewöhnlichen Z-Konfiguration vor. Bindungslängen und -winkel zeigen mit Ausnahme der zentralen C—C-Bindung, die mit A = 1.531 Å relativ kurz erscheint, normale Werte.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19761090237
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  • 7
    Electronic Resource
    Electronic Resource
    Verdrillte Oxalsäurederivate Die Kristall- und Molekülstruktur von N,N,N′,N′-Tetramethyloxamid und -monothiooxamid (1977)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 110 (1977), S. 1159-1166 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Twisted Oxalic Acid Derivatives The Crystal and Molecular Structure of N,N,N′,N′-Tetramethyloxamide and -monothiooxamideThe structures of the title compounds (2 and 3) have been determined from X-ray data, and refined to R = 0.065 (2) and 0.057 (3) respectively. 2 crystallizes in the space group C2/c, 3 in the space group P21/c. - In the crystal 2 exhibits a configuration in which the two halves of the molecule are twisted by 71.4°. This angle amounts to 87.4° in 3.
    Notes: Die Strukturen der Titelsubstanzen (2 und 3) wurden röntgenographisch bestimmt und bis zu R-Werten von 0.065 (2) bzw. 0.057 (3) verfeinert. 2 kristallisiert in der Raumgruppe C2/c, 3 in der Raumgruppe P21/c. - 2 liegt im Kristall in einer Konfiguration vor, bei der die beiden Molekülhälften um 71.4° gegeneinander verdrillt sind; bei 3 beträgt dieser Winkel 87.4°.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19771100339
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  • 8
    Electronic Resource
    Electronic Resource
    Alkinylverbindungen von Übergangsmetallen, XXIX. Alkinyl[1,2-bis(diphenylphosphino)äthan]-Komplexe des Platins(II) (1975)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 108 (1975), S. 1511-1517 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Alkynul Compounds of Transition Metals, XXIX. Alkynyl[ethylenebis(diphenylphosphine)] complexes of Platinum(II)cis-[PtCl2(dpe)] reacts with alkali acetylides in liquid ammonia or liquid methylamine to yield nonionic monomers of the type cis-[Pt(C≡C̊)2(dpe)] (dpe = (C6H5)2P[CH2]2P(C6H5)2; R = H, CH3, C6H5). The analogous reaction with the divalent anion of o-diethynylbenzene, however, gives the polymeric cis-[Pt(C≡C)2C6H4(dpe)]n, cis-[Pt(C≡C)2C6H4(dpe)]n. With an excess of acetylide polymeric complexes of the type [K2Pt(C≡C̊)4(dpe)]n are precipitated.
    Notes: Durch Umsetzung von cis-[PtCl2(dpe)] mit Alkaliacetyliden in flüssigem Ammoniak bzw.flüssigem Methylamin werden nichtionische, einkernige Verbindungen des Typs cis-[Pt(C≡C̊)2(dpe)] (dpe = (C6H5)2P[CH2]2P(C6H5)2; R = H, CH3, C6H5) dargestellt. Eine analoge Reaktion mit dem zweiwertigen Anion des o-Diäthinylbenzols hingegen führt zu einem koordinationspolymeren cis-[Pt(C≡C)2C6H4(dpe)]n. Die Anwendung eines Acetylidüberschusses führt zu polymeren Komplexen des Typs [K2Pt(C≡C̊)4(dpe)]n.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19751080519
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  • 9
    Electronic Resource
    Electronic Resource
    Kristall- und Molekülstruktur von 5-tert-Butyldithioisophthalsäure-O,O′-diethylester (1977)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 110 (1977), S. 3792-3798 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal and Molecular Structure of O,O′-Diethyl 5-tert-ButyldithioisophthalateThe structure of the title compound (4) has been determined from X-ray data by means of direct methods and refined to R=0.057. 4 crystallizes in the space group P1¯.  -  The molecule is approximately planar; the interplanar angles between the plane of the benzene ring and those of the RO—CS-groups being 5.3° and 7.6°, respectively. The C=S bond length of 1.631 ± 0.002 Å points to a moderate double bond character.
    Notes: Die Struktur der Titelsubstanz (4) wurde röntgenographisch mit Hilfe der Direktmethode bestimmt und bis zu einem R von 0.057 verfeinert. 4 kristallisiert in der Raumgruppe P1¯.  -  Das Molekül ist fast eben gebaut; die Interplanarwinkel zwischen der Ebene des Benzolrings und denen der RO—CS-Gruppen betragen 5.3° und 7.6°. Die C=S-Bindungslänge von 1.631 ± 0.002 Å läßt auf einen mäßig ausgeprägten Doppelbindungscharakter schließen.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19771101209
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  • 10
    Electronic Resource
    Electronic Resource
    Bildung, Reaktionen, Kristall- und Molekülstruktur des cyclischen Sulfenylcarboxylates: 3-Oxo-3H-2,1-benzoxathiol-7-carbonsäure-methylester (1978)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 111 (1978), S. 1685-1692 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Formation, Reactions, Crystal and Molecular Structure of the Cyclic Sulfenylcarboxylate: Methyl 3-Oxo-3H-2.1-benzoxathiole-7-carboxylateOn heating of 2-(benzylsulfinyl)isophthalic acid (4) with acetic acid/acetic anhydride the cyclic sulfenylcarboxylates 7a and 7b are formed in an unexpected elimination reaction and rearrangement, respectively. 7a can be methylated to the title compound 7c. The structure of 7c has been determined from X-ray data and refined to R = 0.06. 7c crystallizes in the monoclinic system, space group P21/c. The molecule is nearly planar and reveals an intramolecular interaction which is reflected in a short S…‥O distance of 252 pm and an unusual IR spectrum (νCO 1750. 1650 cm-1).
    Notes: In einer unerwarteten Eliminierungsreaktion bzw. Umlagerung bilden sich beim Erhitzen von 2-(Benzylsulfinyl)isophthalsäure (4) mit Essigsäure/Essigsäureanhydrid die cyclischen Carbonsäure-Sulfensäureanhydride 7a und 7b. 7a kann zur Titelverbindung 7c methyliert werden. Die Struktur von 7c wurde röntgenographisch bestimmt und bis zu R = 0.06 verfeinert. 7c kristallisiert monoklin in der Raumgruppe P21/c. Das Molekül ist fast planar und zeigt intramolekulare Wechselwirkung, die an einem geringen S…‥O-Abstand (252 pm) und einem ungewöhnlichen IR-Spektrum (νCO 1750, 1650 cm-1) erkannt werden kann.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19781110505
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