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  • Inorganic Chemistry  (2)
  • Stream corridors  (2)
  • 1985-1989  (4)
  • 1987  (4)
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  • 1985-1989  (4)
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  • 1
    ISSN: 1432-1009
    Keywords: Stream corridors ; Pacific Northwest ; Land-use planning ; Local land-use legislation ; Stream corridor protection ; Puget Sound ; King County (Washington)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract King County, Washington is part of the rapidly growing Pacific Northwest region. Analysis of past and current federal, state, and county regulations and administation reveals how stream corridors have been protected to date. This article draws on scientific literature and a case study to suggest future management strategies and guidelines for controlling development in King County watersheds.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1009
    Keywords: Stream corridors ; Buffer widths ; Environmental planning ; Puget Sound ; Pacific Northwest ; King County (Washington) ; Watershed management
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract King County, Washington is a part of the rapidly growing Pacific Northwest region. This growth has placed pressure on stream corridors. Past studies about regional stream corridors provide a rich source of information for environmental planners and managers. This article draws on existing literature and case studies to provide guidelines for determining optimal stream corridor widths in a watershed located in King County, Washington.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 553 (1987), S. 57-63 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Azidocuprates(II). Crystal Structure of (PPh4)2[Cu2(N3)6](PPh4)2[Cu(N3)4] and (PPh4)2[Cu2(N3)6], which is already known, are prepared from the corresponding chloro cuprates and excess silver azide in dichloro methane suspension. The azido cuprates form nonexplosive brown crystals of low sensitivity to moisture and are characterized by i.r. spectroscopy. (PPh4)2[Cu2(N3)6] was submitted to a X-ray crystallographic structural analysis (4284 observed, independent reflexions, R = 0.034). The compound crystallizes triclinic in the space group P1 with one formula unit per unit cell. The lattice parameters are a = 1047.4 pm; b = 1131.1 pm; c = 1179.4 pm; α = 101.26°; β = 109.31°; γ = 103.42°. The compound consists of PPh4⊕ cations and centrosymmetric anions [Cu2(N3)6]2⊖, which meet D2h-symmetry fairly well. In the anions the copper atoms are linked to a planar Cu2N2 four-membered ring by the N α atoms of two azide groups. The other azido ligands are bonded terminally and complete coordination number 4 at the Cu atoms which show planar geometry.
    Notes: (PPh4)2[Cu(N3)4] sowie das bereits bekannte (PPh4)2[Cu2(N3)6] werden aus Lösungen der entsprechenden Chlorocuprate in Dichlormethan mit überschüssigem Silberazid hergestellt. Die Azidocuprate bilden braune, nicht explosive, nur wenig feuchtigkeitsempfindliche Kristalle, die wir IR-spektroskopisch charakterisiert haben. Von (PPh4)2[Cu2(N3)6] wurde eine röntgenographische Strukturanalyse ausgeführt (4284 unabhängige beobachtete Reflexe, R = 3,4%). Die Verbindung kristallisiert triklin in der Raumgruppe P1 mit einer Formeleinheit pro Elementarzelle und mit den Gitterkonstanten a = 1047,4; b = 1131,1; c = 1179,4 pm; α = 101,26°; β = 109,31°; γ = 103,42°. Die Verbindung besteht aus PPh4⊕-Ionen und zentrosymmetrischen Anionen [Cu2(N3)6]2⊖, die recht gut D2h-Symmetrie erfüllen. In ihnen sind die Cu-Atome über je ein α-N-Atom zweier Azidogruppen zu einem ebenen Cu2N2-Vierring verknüpft; je zwei weitere terminal gebundene Azidogruppen ergänzen die Koordinationszahl 4 an den planar umgebenen Cu-Atomen.
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 555 (1987), S. 7-15 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Azido Complexes of Manganese(II) and Cobalt(II). Crystal Structures of (PPh4)2[Mn(N3)4] and PPh42[Co(N3)3Cl](PPh4)2[Mn(N3)4] and (PPh4)2[Co(N3)3Cl] were obtained as light-brown and green blue, nonexplosive crystalline compounds, respectively. They are only slightly sensitive to moisture and were obtained from the tetrachloro complexes (PPh4)2MCl4 by reactions with silver azide in dichloromethane. The compounds were characterized by thier i.r. spectra and by crystal structure analyses. Both crystallized in the monoclinic space group C2/c, Z = 4, but they are not isotypic. (PPh4)2[Mn(N3)4]: structure determination with 711 independent reflexions, R = 0.097; a = 2249.1, b = 1499.6, c = 1370.3 pm, β = 104.86°. (PPh4)2[Co(N3)Cl]: 2753 reflexions, R = 0.075; a = 1119.7, b = 1899.2, c = 2115.4 pm, β = 90.47°. The structures consist of PPh4+ ions and of anions that are situated on twofold crystallographic rotation axes. The anions show positional disorder, statistically assuming two different orientations with probabilities of 50% each; in the case of [Co(N3)3Cl]2⊖, the Cl atom is superimposed statistically with an azido group, whereas the [Mn(N3)4]2⊖ ion is tilted by about 20° from the ideal position to two sides of the crystallographic axis. In both compounds the cation form layers and the anions are located between the layers.
    Notes: (PPh4)2[Mn(N3)4] bzw. (PPh4)2[Co(N3)3Cl] entstehen in Form hellbrauner (Mn) bzw. grünblauer (Co), wenig feuchtigkeitsempfindlicher, nichtexplosiver Kristalle durch Umsetzung der Tetrachlorometallate (PPh4)2[MCl4] mit überschüssigem Silberazid in Dichlormethan. Die Verbindungen werden durch ihre IR-Spektren und durch röntgenorgraphische Strukturanalysen charakterisiert. Beide Verbindungen kristallisieren monoklin in der Raumgruppe C2/c, Z = 4, sie sind jedoch nicht isotyp. (PPh4)2[Mn(N3)4]: Strukturbestimmung mit 711 unabhängigen beobachtten Reflexen, R = 9,7%. Gitterkonstanten: a = 2249,1; b = 1499,6; c = 1370,3 pm; β = 104,86°. (PPh4)2[Co(N3)3Cl]: Strukturbestimmung mit 2753 unabhängigen beobachteten Reflexen, R = 7,5%. Gitterkonstanten: a = 1119,7; b = 1899,2; c = 2115,4 pm; β = 90,47°. Die Strukturen bestehen aus PPh4⊕- Ionen und aus Anionen, die sich auf kristallographischen zweizähligen Drehachsen befinden. Die Anionen sind je auf zwei Positionen mit halber Besetzungswahrscheinlichkeit fehlgeordnet; beim [Co(N3)3Cl]2-Ion überlagert sich das Chloratom statistisch mit einer Azidogruppe, beim [Mn(N3)4]2-Ion ist das Ion um etwa 20° aus der Ideallage statistisch nach zwei Seiten der Drehachse gekippt. In beiden Verbindungen bilden die Kationen Schichten, zwischen denen sich die Anionen befinden.
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