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  • 1
    ISSN: 1434-4475
    Keywords: Crystal structure analysis ; Electronic spectra ; Infrared spectra ; Magnetic susceptibility ; Pyridine-2,6-dithiocarbomethylamide nickel(II)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Kristallstruktur des paramagnetischen bis(Pyridin-2,6-dithiocarbomethylamid) Nickel(II)-nitrats (NiPDTA) wurde bestimmt. C18H22N6S4Ni·(NO3)2·(H2O)1,5, monoklin, C2/c,Z=4,a=14,705 (3) Å,b=23,254 (8) Å,c=8,383 (3) A, β=98,18 (2)°,d x=1,55gcm−3,d m=1,53gcm−3. Das Phasenproblem wurde mittelsPatterson-und Differenz-Fourier-Synthese bestimmt und die Struktur bis zu einem kristallographischenR-Faktor vonR=0.053 verfeinert. Das Nickel-Atom ist von vier Thioamid-Schwefelatomen und zwei Pyridin-Stickstoffatomen in quadratisch-bipyramidaler Anordnung umgeben. Schwingungsspektren und Anregungsspektren des Komplexes werden diskutiert.
    Notes: Abstract The crystal structure of the paramagnetic bis(pyridine-2,6-dithiocarbomethylamide) nickel(II) nitrate (NiPDTA) is described: C18H22N6S4·(NO3)2·(H2O)1,5, monoclinic, C2/c,Z=4,a=14.705 (3) Å,b=23.254 (8) Å,c=8.383 (3) A, β=98.18 (2)°,d x=1.55 gcm−3,d m=1.53 gcm−3. The structure was solved withPatterson and differenceFourier techniques and refined to a residual ofR=0.053. The nickel is surrounded by a square bipyramidal coordination of four thioamide sulfur atoms and two pyridine nitrogen atoms. Vibrational and electronic band positions for this compound are discussed.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1434-4475
    Keywords: Pore analysis ; Small angle X-ray scattering ; Gas sorption ; Void system ; PAN-fibers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Both inner surface and void system of technicalPAN-fibres (Wolpryla 65) have been determined by means of low temperature gas sorption, and by X-ray small angle analysis. We find similar trends for both methods, but different absolute values. These differences are explained by structural considerations. A model for the structure of the voids system is derived from the X-ray data.
    Type of Medium: Electronic Resource
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