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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 126 (1995), S. 1151-1159 
    ISSN: 1434-4475
    Keywords: Allene ; 2,2-Dimethylpenta-3,4-dienal ; Hydrazones ; Spectroscopy ; X-ray structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Herstellung einiger neuer 2,2-Dimethylpenta-3,4-dienal — Derivate durchClaisen-Cope — Umlagerung der Pyrolyseprodukte der entsprechenden Acetale und anschließende Kondensationsreaktion wird beschrieben. Die Synthese des Homoallenlketons5 durchGrignard — Reaktion und darauffolgende Oxidation des gebildeten Alkohols mit Kaliumchlorochromate (KCC) wird vorgestellt. Alle neuen Verbindungen werden mittels IR-, MS-,1H- und13C-NMR-Spektroskopie charakterisiert. Die NMR — Signale werden mittels C, H-Korrelationsexperimenten (direkt und long-range) eindeutig zugeordnet. Die Struktur von 2,2-Dimethylhexa-3,4-dienal-2,4-dinitrophenyl-hydrazon in Lösung und im Kristall wird diskutiert.
    Notes: Summary The preparation of some new 2,2-dimethylpenta-3,4-dienal derivatives starting byClaisen-Cope rearrangement of the pyrolytic product of the corresponding acetales and followed by condensation reactions is described. The synthesis of homoallenylketone5 from homoallenylaldehyde3 byGrignard reaction and followed by the oxidation of the formed alcohol using potassium chlorochromate (KCC) is reported. All new compounds are characterized by IR, MS,1H, and13C NMR spectroscopy. The full assignment of the NMR signals is based on HETCOR and FLOCK pulse sequences. The molecular and crystal structure of 2,2-dimethylhexa-3,4-dienal 2,4-dinitrophenylhydrazone is presented.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 1101-1105 
    ISSN: 0044-2313
    Keywords: Benzenselenonyl amides ; low temperature structures ; Se(VI)—N compounds ; twinned crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Die Kristallstrukturen der Benzenselenonylamides C6H5SeO2NXY, X, Y = H, CH3 bei 120 K. Die Zwillingskristallstruktur von C6H5SeO2NH2Zur Röntgenstrukturanalyse bei 120 K von C6H5SeO2N(CH3)2 (1) und C6H5SeO2NHCH3 (2) wurden Einkristalle verwendet für die Strukturbestimmung von C6H5SeO2NH2 (3) erfolgte an einem Zwillingskristall. (1) besteht aus isolierten Molekülen, in (2) sind die Moleküle durch H-Bindungen zu Dimeren verknüpft. Die Struktur von (3) wird aus unendlichen Ketten gebildet. Die Se—N Bindungsabstände sind 1.815(2) Å für (1), 1.791(2) Å für (2) und 1.781(6) Å für (3).
    Notes: The X-ray structures at 120 K of C6H5SeO2N(CH3)2 (1) and C6H5SeO2NHCH3 (2) were determined from single crystal data, the structure of C6H5SeO2NH2 (3) was determined from a twin. The structure of (1) is composed of isolated molecules, that of (2) of dimers via H-bonds and the structure of (3) forms infinite chains. The Se—N lengths are 1.815(2) Å for (1), 1.791(2) Å for (2), and 1.781(6) Å for (3).
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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