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  • Articles  (32)
  • 1980-1984  (32)
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  • Articles  (32)
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  • 1
    Electronic Resource
    Electronic Resource
    Bariumbromiddihydrat (1980)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 36 (1980), S. 437-438 
    Details
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567740880003421
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  • 2
    Electronic Resource
    Electronic Resource
    N,N'-Ethylenbis(1-iminomethyl-2-naphtholato)kupfer(II) und N,N'-Ethylenbis(1-iminomethyl-2-naphtholato)nickel(II) (1980)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 36 (1980), S. 1209-1211 
    Details
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S056774088000564X
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  • 3
    Electronic Resource
    Electronic Resource
    The Serayu Valley Project, Central Java, Indonesia (1973–1980) (1980)
    Springer
    GeoJournal 4 (1980), S. 71-75 
    Details
    ISSN: 1572-9893
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography
    Notes: Abstract The Serayu Valley Project is a joint Indonesian/Dutch research and training project for river basin development. The cooperation between the Faculty of Geography of the Gadjah Mada university of Yogyakarta and several Dutch university earth sciences groups is sponsored by the Netherlands Universities Foundation for International Cooperation (NUFFIC). Part I deals with the objectives, funding, structure and educational and research organization of the project. Part II contains a very brief description of the Serayu River Basin (± 3,700 km2) selected as area of study for the project. Part III presents the approach for planning and development in a tentative outline of a masterplan for the basin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00586759
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  • 4
    Electronic Resource
    Electronic Resource
    Bioavailability of methotrexate tablets (1982)
    Springer
    Pharmacy world & science 4 (1982), S. 89-90 
    Details
    ISSN: 1573-739X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The bioavailability of methotrexate 10 mg tablets has been determined to be 62±16%. After administration of a dose of 30 mg/m2 a maximum plasma concentration of ca. 20. 10−7 mole/l was found after ca. 1.7 h. The methotrexate plasma half-life was 2.4 h. It was concluded that the 10 mg tablet formulation at the dosage investigated is a suitable clinical methotrexate preparation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01962252
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  • 5
    Electronic Resource
    Electronic Resource
    The velocity dependence of the transient magnetic field of O in Fe (1981)
    Springer
    Hyperfine interactions 11 (1981), S. 279-292 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The transient field precession has been measured for16O ions in the 3 1 − excited state recoiling into magnetized iron foils with an initial velocity of 8.0v 0 (v 0=c/137). The recoil velocity after passage through the Fe foils has been varied by adjusting the foil thickness. The resulting field strengths show strong deviations from the empirical linear velocity dependence of the transient field. The velocity dependence can be described well on the basis of recently measured probabilities for K-shell vacancy production for O in Fe, with a velocity independent degree of polarization ξ=0.14 for the unpaired electrons in the K-shell.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01026487
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  • 6
    Electronic Resource
    Electronic Resource
    Protonenresonanz-Spekroskopie ungesättigter Ringsysteme, XXIX1). Einfache Synthese von Benzocycloocten durch Protonierung von Biphenylen-Dianion (1984)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 117 (1984), S. 1069-1076 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Proton Resonance Spectroscopy of Unsaturated Ringsystems, XXIX. Simple Synthesis of Benzocyclooctene by Protonation of Biphenylene DianionBiphenylene dianion (1) reacts with H2O to give 4a,8b-dihydrobiphenylene (3) that opens thermally to give benzocyclooctene (4) (yield 〉 80%). At 0°C 3 has a half life of 1 min. The activation parameters of the rearrangement 3 → 4 are δH* = 78.8 ± 5.0 kJ/mol and δS* = - 7.3 ± 8.7 j/mol K. 3 reacts with maleic anhydride to give a Diels-Alder adduct, whose structure has been determined by X-ray analysis.
    Notes: Biphenylen-Dianion (1) reagiert mit H2O zu 4a,8b-Dihydrobiphenylen (3). das thermisch zu Benzocylcoocten (4) öffnet (Ausb. 〉 80%). Bei 0°C besitzt 3 eine Halbwertszeit von 1 min. Die Aktivierungsparameter der Umlagerung 3 → 4 betragen δH* = 78.8 ± 5.0 kJ/mol und δS* = - 7.3 ± 8.7 J/mol K. 3 liefert mit Maleinsäureanhydrid ein Diels-Alder-Addukt, dessen Struktur röntgenographisch bestimmt wurde.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19841170321
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  • 7
    Electronic Resource
    Electronic Resource
    Darstellung und Kristallstruktur von 3-(Lithiomethyl)-1,1,2,2-tetramethylcyclopropan, einer stabilen Cyclopropylmethyllithium-Verbindung (1984)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 117 (1984), S. 2547-2554 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Crystal Structure of 3-(Lithiomethyl)-1,1,2,2-tetramethylcyclopropane, a Stable Cyclopropylmethyllithium CompoundThe cyclic chlorine and mercury compounds 6 and 9 as well as the open-chain chloro compound 7 react with lithium power in diethyl ether to afford the pure cyclopropylmethyllithium compound 10 completely free of diethyl ether. Only at - 60°C starting with 7 besides 10.8% of the corresponding open-chain organolithium compound 11 was detected. X-ray analysis of 10 showed solvent-free hexameric clusters with the lithium atoms forming a trigonal antiprism with unoccupied trianglular faces on the top and at the bottom while each of the six laterally triangular faces is coordinated to a 2,2,3,3-tetramethylcyclopropylmethyl ligand.
    Notes: Sowohl die cyclischen Chlor- und Quecksilberverbindungen 6 und 9 als auch die offenkettige Chlorverbindung 7 liefern bei der Umsetzung mit Lithiumpulver in Diethylether die reine etherfreie Cyclopropylmethyllithium-Verbindung 10. Nur bei - 60°C lassen sich ausgehend von 7 noch 8% der entsprechenden offenkettigen Lithiumverbindung 11 neben 10 nachweisen. Die Röntgenstrukturanalyse von 10 ergab hexamere Cluster, in denen die Lithiumatome ein trigonales Antiprisma bilden, dessen obere und untere Dreiecksfläche unbesetzt ist, während über jeder der sechs seitlichen Dreiecksflächen ein 2,2,3,3-Tetramethylcyclopropylmethyl-Rest koordiniert ist.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19841170802
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  • 8
    Electronic Resource
    Electronic Resource
    NaM2OH(SO3)2 · 1 H2O mit M = Mg, Mn, Fe, Co, Ni und Zn Ein neuer Typ basischer SulfiteProfessor Hans Joachim Berthold zum 60. Geburtstage am 9. Mai 1983 gewidmet (1983)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 499 (1983), S. 99-108 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: NaM2OH(SO3)2 · 1 H2O with M = Mg, Mn, Fe, Co, Ni, and Zn. A New Class of Basic SulfitesHitherto unknown hydroxide sulfites of the type NaM2OH(SO3)2 · 1 H2O with M = Mg, Mn, Fe, Co, Ni, and Zn have been obtained by crystallization from aqueous sulfite solutions containing Na+ and M2+ ions. Crystal structure, IR and Raman data, and the results of thermoanalytical studies are reported and discussed. The hydroxide sulfites show a strongly anisotropic thermal expansion due to the layer structure and exhibit an unusually high thermal stability compared to other solid hydrates. The magnesium compound, for example, decomposes at 355°C. The crystal data of the triclinic compounds see “Inhaltsübersicht”.
    Notes: Durch Kristallisation aus natriumhaltigen wässerigen Sulfitlösungen wurden bisher nicht bekannte Hydroxidsulfite des Typs NaM2OH(SO3)2 · 1 H2O mit M = Mg, Mn, Fe, Co, Ni und Zn erhalten. Die Kristallstruktur, die IR- und Ramanspektren sowie das Ergebnis thermoanalytischer Untersuchungen werden mitgeteilt und diskutiert. Die Verbindungen zeigen aufgrund ihrer Schichtenstruktur eine stark anisotrope thermische Ausdehnung. Sie besitzen eine für Hydrate ungewöhnlich große thermische Stabilität. Die Magnesiumverbindung zersetzt sich z. B. erst oberhalb von 355°C. Die Verbindungen des Typs NaM2OH(SO3)2 · 1 H2O kristallisieren triklin (P1, Z = 2) mit folgenden Gitterdaten: M = Mg: a = 890,5(1), b = 784,5(1), c = 631,5(1) pm, α = 113,28(2)°, β = 110,41(1)°, γ = 98,00(2)°, M = Mn: a = 907,6(1), b = 795,7(1), c = 648,7(1) pm, α = 112,71(1)°, β = 109,34(1)°, γ = 99,23(1)°, M = Fe: a = 898,8(1), b = 789,0(1), c = 634,8(1) pm, α = 112,06(1)°, β = 109,59(1)°, γ = 99,76(1)°, M = Co: a = 888,0(1), b = 783,7(1), c = 631,6(1) pm, α = 112,61(1)°, β = 109,85(1)°, γ = 98,93(1)°, M = Ni: a = 878,4(2), b = 777,0(3), c = 626,3(1) pm, α = 112,54(2)°, β = 109,84(2)°, γ = 99,47(3)°, M = Zn: a = 887,4(1), b = 785,2(1), c = 629,9(1) pm, α = 112,27(1)°, β = 109,67(1)° und γ = 99,66(1)°.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19834990412
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  • 9
    Electronic Resource
    Electronic Resource
    Zur Kenntnis der Sulfite und Sulfithydrate des Eisens und Nickels Röntgenographische, thermoanalytische, IR- und Raman-spektroskopische UntersuchungenProfessor Marianne Baudler zum 60. Geburtstage am 27. April 1981 gewidmet (1981)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 475 (1981), S. 165-174 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In den Systemen FeSO3—H2O und NiSO3—H2O konnten folgende Hydrate erhalten werden: α-FeSO3 · 3H2O, γ-FeSO3 · 3H2O, FeSO3 · 2,5 H2O, FeSO3 · 2 H2O, NiSO3 · 6 H2O, NiSO3 · 3 H2O, NiSO3 · 2,5 H2O und NiSO3 · 2 H2O. Die Gitterdaten der folgenden Hydrate wurden anhand von Einkristallmessungen bestimmt: γ-FeSO3 · 3 H2O: a = 965,9(1), b = 557,1(1), c = 944,7(1) pm, Z = 4, FeSO3 · 2 H2O (P21/n): a = 645,6(1), b = 863,1(1), c = 761,2(1) pm, β = 99,84(1)°, Z = 4, NiSO3 · 3 H2O: a = 945,0(1), b = 547,2(1), c = 932,5(1) pm, Z = 4, NiSO3 · 2,5 H2O (P41212): a = b = 935,3(1), c = 1016,6(1) pm, Z = 8, NiSO3 · 2 H2O (P21/n): a = 631,4(1), b = 851,0(1), c = 744,7(1) pm, β = 98,91(1)°, Z = 4. Die IR- und Raman-Spektren sowie das Ergebnis thermoanalytischer Messungen (DTA, DTG, Röntgenheizaufnahmen) werden mitgeteilt. Die bei Sulfiten und Sulfithydraten zweiwertiger Metalle bisher beobachteten Strukturtypen werden diskutiert.Sulfites and Sulfite Hydrates of Iron and Nickel. X-ray, Thermoanalytical, I.R., and Raman DataIn the systems FeSO3—H2O and NiSO3—H2O the following hydrates have been found: α-FeSO3 · 3H2O, γ-FeSO3 · 3H2O, FeSO3 · 2,5 H2O, FeSO3 · 2 H2O, NiSO3 · 6 H2O, NiSO3 · 3 H2O, NiSO3 · 2,5 H2O and NiSO3 · 2 H2O. The following crystal data have been determined by single crystal measurements: γ-FeSO3 · 3 H2O: a = 965,9(1), b = 557,1(1), c = 944,7(1) pm, Z = 4, FeSO3 · 2 H2O (P21/n): a = 645,6(1), b = 863,1(1), c = 761,2(1) pm, β = 99,84(1)°, Z = 4, NiSO3 · 3 H2O: a = 945,0(1), b = 547,2(1), c = 932,5(1) pm, Z = 4, NiSO3 · 2,5 H2O (P41212): a = b = 935,3(1), c = 1016,6(1) pm, Z = 8, NiSO3 · 2 H2O (P21/n): a = 631,4(1), b = 851,0(1), c = 744,7(1) pm, β = 98,91(1)°, Z = 4. IR, Raman, and thermoanalytical (DTA, DTG, high temperature X-ray) data are presented. The structure types found for sulfites and sulfite hydrates of bivalent metals are discussed.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19814750419
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  • 10
    Electronic Resource
    Electronic Resource
    Zur Kenntnis der Hydrate des Typs MX2 · 1 H2O mit M = Sr, Ba und X = Cl, Br, I. Kristallstrukturen des Strontiumchlorid-Monohydrats, SrCl2 · 1 H2O, und des Strontiumbromid-Monohydrats, SrBr2 · 1 H2OProfessor Rudolf Hoppe zum 60. Geburtstage am 29. 10. 1982 gewidmet (1983)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 497 (1983), S. 151-156 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On Hydrates of the Type MX2 · 1 H2O with M = Sr, Ba and X = Cl, Br, I. Crystal Structures of Strontium Chloride Monohydrate, SrCl2 · 1 H2O, and Strontium Bromide Monohydrate, SrBr2 · 1 H2OThe structures of SrCl2 · 1 H2O, orthorhombic, Pnma, a = 1088.1(1), b = 416.2(1), c = 886.4(1) pm, Z = 4, dc = 2.92 Mg m-3, R = 0.052 for 755 reflections, and of SrBr2 · 1 H2O, orthorhombic, Pnma, a = 1146.4(1), b = 429,5(1), c = 922.9(1) pm, Z = 4, dc = 3.88 Mg m-3, R = 0.056 for 762 reflections have been determined from a Patterson synthesis and refined by Fourier and Least Squares methods. The structure consists of [SrX2 = H2O]n-layers normal to [100] and Sr—H2O—Sr—H2O-chains parallel [010]. The Sr—O distances are 265.1(3) pm, SrCl2 · 1 H2O, and 265.9(4) pm, SrBr2 · 1 H2O. The shortest Sr—Cl and Sr—Br distances (298.9(1) and 315.3(1) pm) are within the layers. The environment of oxygen and strontium is a distorted tricapped trigonal prism. The orientation of the water molecules has been determined from vibrational spectroscopic measurements. The hydrogen atoms H1 and H2 form bifurcated hydrogen bonds of different strength to neighbouring halide ions. The corresponding O···X distances are 331.9(4) and 320.2(4) pm, SrCl2 · 1 H2O, and 340.8(4) and 333.8(4) pm, SrBr2 · 1 H2O. The other O—X distances are between 310.3(5) and 323.7(5) pm, SrCl2 · 1 H2O, and 323.5(5) and 333.2(6) pm, SrBr2 · 1 H2O.
    Notes: Die Strukturen des SrCl2 · 1 H2O, orthorhombisch, Pnma, a = 1088,1(1), b = 416,2(1), c = 886,4(1) pm, Z = 4, drö = 2,92 Mg m-3, R = 0,052 für 755 Reflexe und des SrBr2 · 1 H2O, orthorhombisch, Pnma, a = 1146,4(1), b = 429,5(1), c = 922,9(1) pm, Z = 4, drö = 3,88 Mg m-3, R = 0,056 für 762 Reflexe wurden nach der Schweratommethode bestimmt und mit Fourier- und Least-squares-Verfahren verfeinert. Die Struktur besteht aus [SrX2 · H2O]n-Schichten senkrecht [100] mit Sr—H2O—Sr—H2O-Zick-Zack-Ketten parallel [010]. Die Sr—O-Abstände betragen 265,1(3) pm beim SrCl2 · 1 H2O und 265,9(4) pm beim SrBr2 · 1 H2O. Die kürzesten Sr—Cl- und Sr—Br-Abstände (298,9(1) bzw. 315,3(1) pm) liegen innerhalb der Schichten. Die Umgebung des Sauerstoffs und des Strontiums ist verzerrt tricapped-trigonal-prismatisch. Die Orientierung der Kristallwassermoleküle konnte mit Hilfe schwingungsspektroskopischer Messungen bestimmt werden. Die Wasserstoffatome H1 und H2 bilden verzweigte, unterschiedlich starke Wasserstoffbrücken zu benachbarten Halogenidionen aus. Die entsprechenden O···X-Abstände sind 331,9(4) und 320,2(4) pm beim SrCl2 · 1 H2O bzw. 340,8(4) und 333,8(4) pm beim SrBr2 · 1 H2O. Die übrigen O—X-Abstände liegen zwischen 310,3(5) und 323,7(5) pm beim SrCl2 · 1 H2O bzw. 323,5(5) und 333,2(6) pm beim SrBr2 · 1H2O.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19834970213
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