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  • 1970-1974  (10)
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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 105 (1972), S. 434-440 
    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 N-(Phenoxycarbonyl)azepineN-(Phenoxycarbonyl)azepine (1d) crystallizes in the monoclinic space group P21 with a unit cell of the dimensions a = 8.64 Å, b = 6.15 Å, c = 10.64 Å, β = 97.61°; Z = 2. The structure has been determined by single-crystal X-ray diffraction using direct methods and has been refined by LSQ-calculations. The azepine-ring exists in a boat conformation with localized double bonds.
    Notes: N-Phenoxycarbonyl-azepin (1d) kristallisiert in der monoklinen Raumgruppe P21 mit den Gitterkonstanten a = 8.64 Å, b = 6.15 Å, c = 10.64 Å, β = 97.61°; Z = 2. Die Struktur der Verbindung wurde röntgenographisch mittels direkter Methoden bestimmt und durch LSQ-Rechnungen verfeinert. Der Azepinring besitzt ausgeprägte Bootform mit lokalisierten Doppelbindungen.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 105 (1972), S. 1949-1955 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Pyrazolo[4.3-e]as-triazine, a New Heterocyclic System from Pseudomonas Fluorescens Var. PseudoiodinumPseudoiodinine (1), the red pigment isolated from Pseudomonas fluorescens var. pseudoiodinum, loses easily one methyl group under formation of the yellow pigment normethylpseudoiodinine, which was identified by single crystal X-ray diffraction as 3-methoxy-1H-pyrazolo[4.3-e]as-triazine (2). Methylation of the yellow pigment with diazomethane leads to pseudoiodinine, probably by methylation at N-2.
    Notes: Pseudoiodinin (1), das rote Pigment aus Pseudomonas fluorescens var. pseudoiodinum, spaltet sehr leicht eine Methylgruppe ab und geht in das gelbe Pigment Normethylpseudoiodinin über, das durch Röntgenstrukturanalyse als 3-Methoxy-1 H-pyrazolo[4.3-e]as-triazin (2) identifiziert wurde. Mit Diazomethan kann aus dem gelben Pigment Pseudoiodinin zurückgebildet werden. Dabei erfolgt die Methylierung wahrscheinlich am N-2.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 107 (1974), S. 3332-3336 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Crystal and Molecular Structure of DihydrobotrydialThe structure of dihydrobotrydial (2), a derivative of the antibiotic botrydial (1), has been determined by single crystal X-ray diffraction using direct methods. The refinement led to an R-factor of 0.086.
    Notes: Die Struktur von Dihydrobotrydial (2), einem Derivat des Antibiotikums Botrydial (1), wurde durch Röntgenstrukturanalyse nach der Methode der symbolischen Addition bestimmt und bis zu einem R-Faktor von 0.086 verfeinert.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 107 (1974), S. 598-604 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Crystal and Molecular Structure of Diethyl 2,4-Bis(diethylamino)-1,3-cyclobutadienedicarboxylateIt is shown by X-ray diffraction methods that the unit cell of the title compound contains two pairs of symmetry independent but centrosymmetric molecules with identical data within the limits of erros. Accordingly the four-membered ring has the form of a distorted square with bond lenghts of 1.46 Å and angles of 87 93°. The centres of the four-membered ring linked to the ethoxycarbonyl groups show bending angles of 23°
    Notes: Die Röntgenstrukturanalyse der Titelverbindung zeigt, daß in der Elementarzelle zwei Paare symmetrieunabhängiger aber zentrosymmetrischer Moleküle liegen, deren Daten im Rahmen der Fehlergrenzen übereinstimmen. Danach hat der viergliedrige Ring die Form eines deformierten Quadrates mit Bindungslängen von 1.46 Å und Winkeln von 87 bzw. 93°. Die an die Estergruppe gebundenen Zentren des viergliedrigen Rings weisen Knickwinkel von 23° auf.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 861-872 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Tetramethoxyethylene, VI. Cycloadditions of Tetramethoxyethylene to Carbon SuboxideReaction of tetramethoxyethylene with carbon suboxide yields via the intermediary 1 : 1 cycloadduct 6 a 2 : 1-adduct 10 and a 2 : 2-adduct 19. The structural assignments rest on chemical reactions, spectroscopic data, and an X-ray analysis.
    Notes: Bei der Umsetzung von Tetramethoxy-äthylen (1) mit Kohlensuboxid (2) entstehen als Folgeprodukte des intermediär auftretenden 1 : 1-Adduktes 6 ein 2 : 1-Addukt 10 und ein 2 : 2-Addukt 19. Die Strukturzuordnung stützt sich auf Reaktionen, spektroskopische Daten und eine Röntgen-Strukturanalyse.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 106 (1973), S. 1033-1037 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Structure of 3-(Diphenylhydroxymethyl)-3H-azepineThe structure of a compound C19H17NO formed by reaction of N-alkoxycarbonylazepines with phenyl lithium has been determined by X-ray technique using direct methods. The compound was identified as 3-(diphenylhydroxymethyl)-3H-azepine. The boat-shaped sevenmembered ring with structural angles α = 31° and β = 55° has the substituent in equatorial position.
    Notes: Die Struktur des Reaktionsproduktes C19H17NO aus N-Alkoxycarbonylazepinen und Phenyllithium wurde röntgenographisch durch Anwendung direkter Methoden bestimmt. Die Verbindung wurde als 3-(Diphenylhydroxymethyl)-3H-azepin identifiziert. Der bootförmige Siebenring mit Strukturwinkel von α = 31° und β = 55° trägt den Substituenten in äquatorialer Position.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 103 (1970), S. 1828-1833 
    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 6-Dimethylamino-5,7-diazaazuleneThe structure of 6-dimethylamino-5,7-diazaazulene (2) has been determined by single-crystal X-ray diffraction. The crystals are monoclinic, space group P21/n with a unit cell of the dimensions a = 6.03 Å,b = 8.79 Å, c = 17.00 Å, β = 92.4°; Z = 4. The structure was determined by symbolic addition method and refined by LSQ-calculations. The bond lengths of the nearly planar molecule are compared with those computed by the SCF method.
    Notes: Die Struktur von 6-Dimethylamino-5.7-diaza-azulen (2) wurde röntgenographisch bestimmt. Die Verbindung kristallisiert in der Raumgruppe P21/n mit den Gitterkonstanten a = 6.03 Å, b = 8.79 Å, c = 17.00 Å, β = 92.4°; Z = 4. Durch symbolische Addition wurde die Struktur aufgeklärt und durch LSQ-Rechnungen verfeinert. Die Bindungslängen des fast ebenen Moleküls werden mit den nach der SCF-Methode berechneten verglichen.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 106 (1973), S. 2268-2276 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Crystal and Molecular Structure of 2,2a,3,4-Tetrahydro-1H-cyclopent[cd]indene-1-carb-oxylic AcidThe structure of 2,2a,3,4-tetrahydro-1H-cyclopent[cd]indene-1-carboxylic acid (1b) has been determined from single-crystal X-ray diffraction data. The crystals are monoclinic, space group C 2/c (a = 29.76, b = 4.57, c = 15.13 Å, β - 108.5°, Z -8). The structure was determined by direct methods and refined to R = 0.066. The structure found is compared with the structure computed by a combined π-SCF-LCAO-MO and force field method. The phenyl-ring is slightly bent and shows deviations of the bond lengths due to the strain of the molecule.
    Notes: Die Struktur von 2,2a,3,4-Tetrahydro-1H-cyclopent[cd]inden-1-carbonsäure (1b) wurde röntgenographisch bestimmt. Die Kristalle sind monoklin, Raumgruppe C2/c (a = 29.76,b = 4.57, c = 15.13 Å, β = 108.5°, Z = 8). Die Struktur wurde durch direkte Methoden aufgeklärt und bis zu einem R-Faktor von 0.066 verfeinert. Die gefundene Struktur wird verglichen mit einer Struktur, die mit einer kombinierten π-SCF-LCAO-MO- und Kraftfeld-Methode berechnet wurde. Der Benzolring ist leicht geknickt und zeigt durch Spannung leicht veränderte Bindungslängen.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 10 (1971), S. 490-491 
    ISSN: 0570-0833
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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