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  • 1
    Electronic Resource
    Electronic Resource
    Die Kristall- und Molekülstruktur des 6,6-Bis(dimethylamino)fulvens (1974)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 107 (1974), S. 832-837 
    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 6,6-Bis(dimethylamino)fulvene6,6-Bis(dimethylamino)fulvene crystallizes in the space group Pn21a, the lattice constants being ao = 13.344 Å, bo = 7.844 Å and co = 9.438 Å. The structure has been solved by superposition and by direct methods in the space group Pnma. The structure was refined by block-diagonal-least-squares to R = 0.037.
    Notes: Das 6,6-Bis(dimethylamino)fulven kristallisiert in der Raumgruppe Pn21a mit den Gitter-konstanten ao = 13.344 Å, bo = 7.844 Å und co = 9.438 Å. Die Struktur wurde durch Superposition und anschließende Resymmetrisierung der Patterson-Funktion und mit direkten Methoden in der zentrosymmetrischen Obergruppe Pnma gelöst.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19741070309
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  • 2
    Electronic Resource
    Electronic Resource
    Die Kristall- und Molekülstruktur des (2,2-Diäthoxyvinyliden)-triphenylphosphorans (1974)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 107 (1974), S. 1949-1956 
    Details
    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 (2,2-Diethoxyvinylidene)triphenylphosphorane(2.2-Diethoxyvinylidene)triphenylphosphorane crystallizes in the space group P21/c with four molecules in a unit cell of dimensions a0 = 13.552 Å, b0 = 9.588 Å, c0 = 17.235 Å, β = 112.5Å. The crystal structure was solved by direct methods and refined by least-squares procedures to an R value of 0.079. Each phenyl group is rotated in the same sense round the P—C bond to give the „paddle wheel“ arrangement. The diethoxyvinylidene group does not deviate significantly from planarity and adopts a staggered position. The cumulene chain is remarkably bent (125.6°), the P—Cα distance is longer than the sum of the covalent radii of doubly bonded phosphorus and carbon atom.
    Notes: (2,2-Diäthoxyvinyliden)triphenylphosphoran (1) kristallisiert in der Raumgruppe P21/c mit den Gitterkonstanten a0 = 13.552 Å, b0 = 9.588 Å, c0 = 17.235 Å, β = 112.5Å und vier Molekülen in der Elementarzelle. Die Struktur wurde mit direkten Methoden aufgeklärt und bis zu einem R-Wert von 7.9% verfeinert. Auf Lücke angeordnet zu den propellerartig verdrehten Phenylringen am Phosphor liegt die nahezu planare Diäthoxyvinyliden-Gruppierung. Die Kumulenkette ist stark gewinkelt (125.6°), der Abstand zwischen Phosphor- und α-Kohlenstoffatom ist größer als die Summe kovalenter Radien von doppelt gebundenem Phosphor und Kohlenstoff.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19741070618
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  • 3
    Electronic Resource
    Electronic Resource
    Kristall- und Molekülstruktur sowie absolute Konfiguration des (+)-Benzylmethyl-α-naphthylphenylphosphonium-bromids (1975)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 108 (1975), S. 3525-3532 
    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 (+)-Benzylmethyl-α-naphthylphenylphosphonium Bromide(+)-Benzylmethyl-α-naphthylphenylphosphonium bromide crystallizes in the space group P212121 with four molecules in the unit cell of dimensions a = 22.12 Å, b = 9.89 Å, c = 9.49 Å. The crystal structure was solved by the heavy atom method and refined to R = 0.058. Taking care of the anomalous dispersion effect the absolute configuration turned out to be a R-configuration.
    Notes: (+)-Benzylmethyl-α-naphthylphenylphosphonium-bromid kristallisiert in der Raumgruppe P212121 mit den Gitterkonstanten a = 22.12 Å, b = 9.89 Å,c = 9.49Å und mit vier Molekülen in der Elementarzelle. Die Struktur wurde nach der Schweratommethode aufgeklärt und bis zu einem R-Wert von 5.8% verfeinert. Unter Berücksichtigung der anomalen Dispersion konnte die absolute Konfiguration ermittelt werden, es liegt R-Konfiguration vor.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19751081113
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  • 4
    Electronic Resource
    Electronic Resource
    Kumulierte Ylide, X. Struktur der thermischen Dimerisierungsprodukte von N-Aryl(triphenylphosphoranyliden)keteniminen (1980)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 113 (1980), S. 3937-3941 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Cumulated Ylides, X Structure of the Thermal Dimerization-products of N-Aryl(triphenylphosphoranylidene)-ketenimines1 dimerize in the melting by (4 + 2)-cycloaddition, protonmigration and Smiles-rearrangement to [4-(diarylamino)-3-(diphenylphosphino)-2-chinolylmethylene]triphenylphosphoranes 5. The structure of 5a is determined by x-ray analysis.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19801131228
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  • 5
    Electronic Resource
    Electronic Resource
    Phosphinalkylene, 491) Chemie und Stereochemie des 9,10,19,20-Tetrahydro-tetrabenzo[a,c,g,i]cyclododecens und einiger seiner Derivate (1991)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 2761-2772 
    Details
    ISSN: 0009-2940
    Keywords: Atropisomerism ; Biphenyl derivatives ; Phosphonium ylides ; Rearrangements ; Helical structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Phosphine Alkylidenes, 491). - Chemistry and Stereochemistry of 9,10,19,20-Tetrahydrotetrabenzo[a,c,g,i]cyclododecene and of Some DerivativesTwofold intermolecular C alkylation of the bis-ylide 4 with the dibromide 5 and subsequent hydrolysis yields meso-9,10,19,20-tetrahydrotetrabenzo[a,c,g,i]cyclododecene (1 b), which isomerizes on heating to give the racemate 1a. From 1a and 1b the isomeric dibromides 7-10 are synthesized. Reaction of 7-10 with phenyllithium leads to the formation of the polycyclic compounds 11, 12, 13, from which 12 may be dehydrogenated to the unsaturated compound 14. Reaction of the dibromides 7-10 with silver acetate occurs with retention yielding the acetates 15-18, which may be hydrolysed to the corresponding alcohols. With the knowledge of the structures of compounds 15-22 the stereochemistry of the synthesis and the Wittig ether rearrangement of the diethers 24 can be elucidated. In the reaction of the dibromides 7-10 with sodium acetate elimination takes place instead of substitution. Starting from 7 and 8 the polycyclic hydrocarbon 31 is formed via the carbenium ion intermediate 26 and subsequent transannular reaction. 31 is dehydrogenated to yield 32, whose X-ray structural analysis shows a multi helical structure. Reaction of the base potassium tert-butylate with the dibromides 7-10 leads to the formation of isomers of the diolefin 2.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19911241219
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  • 6
    Electronic Resource
    Electronic Resource
    Notizen. Kumulierte Ylide, XV. Kristallstruktur des 2-(9-Fluorenyliden)-1-(triphenylphosphoranyliden)ethens (1985)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 118 (1985), S. 1720-1723 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Cumulated Ylides, XV. The Crystal Structure of 2-(Fluorenylidene)-1-(triphenylphosphoranylidene)etheneThe title compound 1 crystallizes in the space group P21/c with four molecules in the unit cell. The structure was solved by direct methods and refined to an R-factor of 0.051. The bond distances and angles show the similarity of the molecules 1 and 2, expected on the base of the reactivities.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19851180437
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  • 7
    Electronic Resource
    Electronic Resource
    Die Kristallstruktur des cis-Perhydro-cyclopenta[1.2-c:3.4-c′]-dithiophen-S.S.S′.S′-tetroxids, C9H14O4S2 (1968)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 101 (1968), S. 1700-1707 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Perhydro-cyclopenta[1.2-c:3.4-c′]dithiophen-S.S.S′.S′-tetroxid kristallisiert in der Raumgruppe P21/a mit den Gitterkonstanten a0 = 9.02, b0 = 15.95, c0 = 8.73 Å und β = 122.5°. Bei dem Versuch, die Struktur aus der Patterson-Funktion zu ermitteln, konnte die Lage der Schwefelatome gefunden werden, doch ließ sich nicht weiter nach der Schweratom-Methode verfahren, da die schweren Atome der Symmetrie der Obergruppe C2/m genügten. Die Struktur wurde durch Anwendung der Sayre-Formel bestimmt, das Molekül liegt in der cis-Konfiguration vor.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19681010522
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  • 8
    Electronic Resource
    Electronic Resource
    Die Kristall- und Molekülstruktur des 6.6-äthylendimercapto-fulvens (1970)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 103 (1970), S. 156-161 
    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 Molecule Structure of 6,6-(Ethylenedithio)fulvene6.6-(Ethylenedithio)fulvene crystallizes in the space group Pc, the lattice constants being a0 = 5.807 Å,b0 = 6.658 Å, c0 = 11.394 Å, and ß = 115.2°. The structure has been elucidated by the Patterson interpretation and superposition method. The results are compared with literature data of 6,6-dimethylfulvene and cyclopentadiene.
    Notes: 6.6-äthylendimercapto-fulven (2) kristallisiert in der Raumgruppe Pc mit den Gitterkonstanten ao = 5.807 Å, b0 = 6.658 Å, c0 = 11.394 Å und ß= 115.2°. Die Struktur wurde aus der Patterson-Funktion mit anschließender Superposition ermittelt. Das Ergebnis der Bestimmung wird mit den bekannten Strukturen von 6.6-Dimethyl-fulven und Cyclopentadien verglichen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19701030122
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  • 9
    Electronic Resource
    Electronic Resource
    Die Kristall- und Molekülstruktur des Bis(tetrachlorcyclopentadienyl)cyclohexans C16H12Cl8 (1975)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 108 (1975), S. 2600-2605 
    Details
    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 the Bis(tetrachlorocyclopentadienyl)cyclohexane C16H12Cl8Bis(tetrachlorocyclopentadienyl)cyclohexane crystallizes in the space group P21/a-C2h5 with four molecules in a unit cell of dimensions a0 = 17.805 Å, b0 = 12.630 Å, c0 = 9.513 Å and β = 113.0°. The crystal structure was solved by direct methods and refined by least squares procedures to an R-value of 0.040. The molecular structure has to be described by 1,1-bis(2,3,4,5-tetrachloro-1,3-cyclopentadienyl)cyclohexane. Some systematic changes in distances were observed.
    Notes: Bis(tetrachlorcyclopentadienyl)cyclohexan kristallisiert in der Raumgruppe P21/a-C2h5 mit den Gitterkonstanten a0 = 17.805 Å, b0 = 12.630 Å, c0 = 9.513 Å und β = 113.0° und vier Molekülen in der Elementarzelle. Die Struktur wurde mit direkten Methoden aufgeklärt und bis zu einem R-Wert von 4.0% verfeinert. Die Analyse ergibt, daß das Molekül als 1,1-Bis(2,3,4,5-tetrachlor-1,3,-cyclopentadienyl)cyclohexan vorliegt. Einige Besonderheiten in den Abständen wurden beobachtet.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19751080815
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  • 10
    Electronic Resource
    Electronic Resource
    Kumulierte Ylide, V. Die Kristall- und Molekülstruktur des Triphenyl(phenylimino-vinyliden)phosphorans (1977)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 110 (1977), S. 3168-3171 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cumulated Ylides, V. The Crystal and Molecular Structure of Triphenyl(phenyliminovinylidene)phosphoraneThe title compound 2a crystallizes in the space group P 1 with two molecules in the unit cell. The structure was solved by direct methods and refined to an R of 0.059. The bond distances and angles in the cumulene chain are in agreement with theoretically expected values.
    Notes: Die Titelverbindung 2a kristallisiert in der Raumgruppe P1 mit zwei Molekülen in der Elementarzelle. Die Struktur wurde mit direkten Methoden aufgeklärt und bis zu einem R-Wert von 0.059 verfeinert. Die Bindungslängen und -winkel in der Kumulenkette stehen in Einklang mit den theoretischen Erwartungen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19771100922
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