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  • 1
    Electronic Resource
    Electronic Resource
    Über Nitridfluoride des Thoriums und des Zirkons (1966)
    Springer
    Naturwissenschaften 53 (1966), S. 551-551 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00602956
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  • 2
    Electronic Resource
    Electronic Resource
    Toward preparing students for change: A critical discussion of the contribution of the history of physics in physics teaching (1994)
    Springer
    Science & education 3 (1994), S. 99-130 
    Details
    ISSN: 1573-1901
    Source: Springer Online Journal Archives 1860-2000
    Topics: Natural Sciences in General
    Notes: Abstract In this paper I place physics teaching, and the inclusion of the history of physics into teaching, within a wide context. I start from the conviction that there are considerable changes ahead in the life circumstances of people in western industrial societies. This expectation should influence our aims of education generally, and in particular the aims of physics teaching. The paper does not offer final solutions, but analyses the situation and thereby argues for a change in perspective in physics teaching. The main idea is that physics teaching has to solve the problem of balancing seemingly incompatible needs, for example, conveying a stock of stable, dependable physics knowledge to students, and on the other hand to train them to see their physics knowledge within varying contexts of change. It is argued that the history of physics can be of high value in solving this problem.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00486387
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  • 3
    Electronic Resource
    Electronic Resource
    Isocyanidkomplexe, IV. Darstellung und Reaktionen Hg(CN)2-verbrückter Metallcarbonyle (1986)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 119 (1986), S. 3268-3275 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Isocyanide Complexes, IV. Synthesis and Reactions of Hg(CN)2-Bridged Metal CarbonylsFrom K[Cr(CO)5CN] (1) and MCl2 (M=Hg, Cd, Zn) the metal-bridged complexes {(CO)5CrCN}2M (2, 9, 10) are synthesized. In an analogous reaction with MeHgCl or PhHgCl, resp., the compounds (CO)5CrCNHgR (R=Me 6, Ph 7) are obtained. Like 2 these complexes show a distinct CN/NC-coordination isomerism. In a THF solution of 2 (M=Hg), mer-[(THF)3Cr{(CO)5CrCN}3] (3) is formed on heating. The corresponding fac-isomer 4 is obtained from CrCl3(THF)3 and 1. [NEt4]CN reacts with 2 to yield [NEt4]2-[Hg{Cr(CO)5CN}4] (5). From (CPh3)2 and 2 the isocyanide complex (CO)5CrCNCPh3 (8) is formed. IR und NMR spectra of the complexes are discussed.
    Notes: Aus K[Cr(CO)5CN] (1) und MCl2 (M=Hg, Cd, Zn) werden die Metall-verbrückten Komplexe {Cr(CO)5CN}2M (2, 9, 10) dargestellt. Analog erhält man mit MeHgCl bzw. PhHgCl die Verbindungen (CO)5CrCNHgR (R=Me 6, Ph 7), die ebenso wie 2 eine CN/NC-Koordinationsisomerie aufweisen. THF-Lösungen von 2 (M=Hg) bilden beim Erhitzen mer-[(THF)3Cr{(CO)5CrCN}3] (3). Das entsprechende fac-Isomere 4 ist aus CrCl3(THF)3 und 1 erhältlich. Mit [NEt4]CN bildet 2 [NEt4]2[Hg{(CO)5CrCN}4] (5). (CPh3)2 und 2 setzen sich zum Isocyanidkomplex (CO)5CrCNCPh3 (8) um. IR- und NMR-Spektren der Verbindungen werden diskutiert.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19861191108
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  • 4
    Electronic Resource
    Electronic Resource
    Eine elektrometrische Methode zur Bestimmung von Unterphosphorsäure (1932)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 206 (1932), S. 125-128 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19322060113
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  • 5
    Electronic Resource
    Electronic Resource
    Über eine argentometrische Methode zur Bestimmung der Unterphosphorsäure bei Gegenwart von Phosphaten und Phosphiten (1931)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 201 (1931), S. 347-352 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19312010132
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  • 6
    Electronic Resource
    Electronic Resource
    Über die quantitative Bestimmung der phosphorigen und der unterphosphorigen Säure (1931)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 201 (1931), S. 337-346 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19312010131
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  • 7
    Electronic Resource
    Electronic Resource
    Über die quantitative Bestimmung der phosphorigen Säure, der unterphosphorigen Säure, der Unterphosphorsäure und der Phosphorsäure (1931)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 201 (1931), S. 353-360 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19312010133
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  • 8
    Electronic Resource
    Electronic Resource
    Sr2Ru7B8, ein Strontium-Rutheniumborid mit einer neuen, vom AlB2-Typ abgeleiteten KanalstrukturFrau Professor Marianne Baudler zum 70. Geburtstage am 27. April 1991 gewidmet (1991)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 594 (1991), S. 57-65 
    Details
    ISSN: 0044-2313
    Keywords: Strontium Ruthenium Boride ; Crystal Structure ; Electrical Resistivity ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Sr2Ru7B8, a Strontium Ruthenium Boride with a New Channel Structure Derived from the AlB2-TypeThe strontium ruthenium boride Sr2Ru7B8 was prepared by reaction of the elements at 1 100°C (tantalum crucible sealed in a steel tube, excess of Sr). It crystallizes tetragonally in the space group P42/m with the lattice constants a = 644.4(1) pm, c = 1015.6(1) pm and Z = 2. The structure was determined by means of X-ray single crystal methods (four-circle diffractometer, MoKα, R = 0.034, Rw = 0.028, 1059 symmetrically independent reflections with I 〉 2σI, 37 variable parameters). Sr2Ru7B8 forms a new channel structure derivable from the AlB2 type by substitutions and shifting operations. The channels contain zig-zag chains of strontium atoms. They are running in the [100] and in the [010] directions in alternating layers. The boron atoms are arranged in pairs and in plane, branched B6 groups. The electrical resistivity is in the range from ϱ = 2.4 mΩ · cm (290 K) to ϱ = 0.8 mΩ · cm (4.2 K) (pressed and sintered rods, 4-probe DC method).
    Notes: Das Strontium-Rutheniumborid Sr2Ru7B8 wurde aus den Elementen bei 1100°C dargestellt (Ta-Tiegel, verschweißte Stahlampulle, Überschuß an Sr). Es kristallisiert tetragonal in der Raumgruppe P42/m mit a = 644,4(1) pm, c = 1 015,6(1) pm und Z = 2. Die Struktur wurde mit Röntgen-Einkristallmethoden bestimmt (Vierkreisdiffraktometer-Intensitäten, MoKα, R = 0,034, Rw = 0,028. 1059 symmetrieunabhängige Reflexe mit I 〉 2σI, 37 variable Parameter). Sr2Ru7B8 bildet eine neue, durch Substitutions- und Verschiebungsoperationen aus dem AlB2-Typ ableitbare Kanalstruktur aus. Die Kanäle, in denen sich Zick-Zack-Ketten aus Strontiumatomen befinden, verlaufen schichtweise abwechselnd in [100]- und in [010]-Richtung. Die Boratome bilden Paare und ebene, verzweigte B6-Gruppen. Der spezifische elektrische Widerstand liegt zwischen ϱ = 2,4 mΩ · cm (290 K) und ϱ = 0,8 mΩ · cm (4,2 K) (gepreßte und gesinterte Stäbchen, 4-Punkt-Gleichstrommethode).
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19915940107
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  • 9
    Electronic Resource
    Electronic Resource
    Ga8Ir4B - ein Gallium-Iridiumborid mit isolierten, annähernd quadratisch planaren Ir4B-Gruppen in einer vom CaF2-Typ abgeleiteten StrukturProfessor Hans-Uwe Schuster in memoriam (1995)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 197-200 
    Details
    ISSN: 0044-2313
    Keywords: Gallium iridium boride ; crystal structure ; preparation ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Ga8Ir4B - a Gallium Iridium Boride with isolated, nearly square planar Ir4B Groups in a Structure derived from the CaF2 TypeThe new compound Ga8Ir4B (tetragonal, I41/acd, a = 853.69(2) pm, c = 2 105.69(6) pm, Z = 8, 614 reflections, 31 parameters, R = 0.034) was prepared by reaction of the elements at 1 100°C. The structure is derived from the CaF2 type. It contains isolated Ir4B groups with boron in an unusual, nearly square planar coordination.
    Notes: Die neue Verbindung Ga8Ir4B (tetragonal, I41/acd, a = 853,69(2) pm, c = 2105,69(6) pm, Z = 8, 614 Reflexe, 31 Parameter, R = 0,034) wurde durch Reaktion der Elemente bei 1 100°C dargestellt. Die Struktur läßt sich vom CaF2-Typ ableiten. Sie enthält isolierte Ir4B-Gruppen mit Bor in einer ungewöhnlichen, nahezu quadratisch planaren Koordination.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19956210206
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  • 10
    Electronic Resource
    Electronic Resource
    Die isotypen Verbindungen BaRh2Si2, BaIr2Si2 und BaPt2Ga2 - eine monokline Verzerrungsvariante der CaRh2B2-StrukturProfessor Welf Bronger zum 65. Geburtstag gewidmet (1997)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 1561-1566 
    Details
    ISSN: 0044-2313
    Keywords: Barium ; platinum ; silicide ; gallium ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Isotypic Compounds BaRh2Si2, BaIr2Si2, and BaPt2Ga2 - a Monoclinic Distortion Variant of the CaRh2B2 StructureThe new compounds BaRh2Si2 (monoclinic, P21/c, a = 792.6(1) pm, b = 664.5(7) pm, c = 767.9(4) pm, β = 91.2(1)°, Z = 4, 2867 reflexions, 47 parameters, R = 0.024), BaIr2Si2 (monoclinic, P21/c, a = 792.47(6) pm, b = 664.28(6) pm, c = 772.22(6) pm, β = 92.181(7)°, Z = 4, 1939 reflexions, 47 parameters, R = 0.037) and BaPt2Ga2 (monoclinic, P21/c, a = 850.4(1) pm, b = 647.3(1) pm, c = 819.8(1) pm, β = 95.97(1)°, Z = 4, 1506 reflexions, 47 parameters, R = 0.038) were prepared by reaction of the elements. Their structures were determined from single crystal data. The compounds crystallize isotypically with a distortion variant of the CaRh2B2 type of structure.
    Notes: Die neuen Verbindungen BaRh2Si2 (monoklin, P21/c, a = 792,6(1) pm, b = 664,5(7) pm, c = 767,9(4) pm, β = 91,2(1)°, Z = 4, 2867 Reflexe, 47 Parameter, R = 0,024), BaIr2Si2 (monoklin, P21/c, a = 792,47(6) pm, b = 664,28(6) pm, c = 772,22(6)pm, β = 92,181(7)°, Z = 4, 1939 Reflexe, 47 Parameter, R = 0,037) und BaPt2Ga2 (monoklin, P21/c, a = 850,4(1) pm, b = 647,3(1) pm, c = 819,8(1) pm, β = 95,97(1)°, Z = 4, 1506 Reflexe, 47 Parameter, R = 0,038) wurden durch Reaktion der Elemente dargestellt und ihre Strukturen mit Einkristalldaten bestimmt. Die Verbindungen kristallisieren isotyp in einer Verzerrungsvariante des CaRh2B2-Typs.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19976231015
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