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  • Inorganic Chemistry  (1,504)
  • Life and Medical Sciences  (716)
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  • 2015-2019
  • 1975-1979  (2,444)
  • 1950-1954
  • 1978  (1,359)
  • 1976  (1,085)
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  • 2015-2019
  • 1975-1979  (2,444)
  • 1950-1954
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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 109 (1976), S. 2338-2339 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 443 (1978), S. 11-18 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: TlPd3O4 and TlPt3O4 - Ternary Platinum Metal Oxides with Cluster StructureThe crystal structure of the cardinal red oxide TlPd3O4, prepared by the reaction of Pdo with TlNO3 or Tl2O3 at 550°C, has been determined on powder samples by X-ray and neutron diffraction. The structure of the cubic compound (a = 959.6(2) pm; space group Fm3m; Z = 8) contains square-planar PdO4 units which are joined to a three dimensional skeleton by triply bonding oxygen atoms. The cubic and rhombicuboctahedral spaces are occupied by TlIII and TlI cations so that the compound can be formulated as a mixed valency thallium(III)-thallium(I)-oxopalladate(II). The relationship with the structure of the platinum bronzes is discussed.The analogous ternary platinum oxide TlPt3O4 (a = 966.3(2)pm) has been obtained by thermal decomposition of Tl2Pt2O7.
    Notes: Die Kristallstruktur des durch Umsetzung von Pdo mit TlNO3 bzw. Tl2O3 bei 550°C erhaltenen kardinalroten Oxides TlPd3O4 wurde durch Röntgen-und Neutronenbeugung an Pulverproben aufgeklärt. In der Struktur der kubischen Verbindung (a = 959,6(2) pm; Raumgruppe Fm3m; Z = 8) sind quadratisch planare Pdo4- Baugruppen über dreibindige O- Atome zu einem dreidimensionalen Netz verknüpft. Die würfelförmigen und rhombendodekaedrischen Hohlräume des Gerüstes sind von TlIII-bzw. TlI-Kationen besetzt, so daß die Verbindung als valenzgemischtes Thallium (III)-thallium(I)-oxopalladat(II) formuliert werden kann. Die Verwandtschaftsverhältnisse zu den Strukturen der Platinbronzen werden diskutiert.Das entsprechende Oxoplatinat TlPt3O4 (a = 966,3(2) pm) konnte durch thermische Zersetzung von Tl2Pt2O7 erhalten werden.
    Additional Material: 3 Ill.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 425 (1976), S. 257-264 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The System Decacarbonyldimanganese/Cyclohexadiene. The Photochemical Reaction of Mn2(CO)10 with 1,3-or 1,4-CyclohexadieneThe products of the photochemical reaction between Mn2(CO)10 and 1,3- or 1,4-cyclohexadiene have been separated by preparative layer chromatography under nitrogen and have been characterized by means of mass and infrared spectroscopy. Besides compounds which have been reported otherwere species like Mn2(CO)8C6H8 could be isolated.
    Notes: Die Produkte der photochemischen Reaktion zwischen Mn2(CO)10 und 1,3- bzw. 1,4-Cyclohexadien wurden mittels präparativer Schichtchromatographie unter Luftausschluß getrennt und anhand ihrer Massen- bzw. IR-Spektren charakterisiert. Neben bereits auf anderem Wege dargestellten Verbindungen konnten Spezies wie Mn2(CO)8C6H8 nachgewiesen werden.
    Additional Material: 2 Tab.
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 425 (1976), S. 265-271 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The System Decarbonyldimanganese/1,3-Butadiene. Characterisation of Some Reaction Products of Mn2(CO)10 with 1,3-ButadieneDecacarbonyldimanganese and 1, 3-Butadiene were reacted photochemically; the reaction products were separated by layer chromatography and characterized by their infrared and mass spectra. The compounds are sensitive to air and light and can be obtained only in extremely low yields.
    Notes: Die Reaktionsprodukte der photochemischen Reaktion zwischen Mn2(CO)10 und 1, 3-Butadien wurden mittels präparativer Schichtchromatographie getrennt und IR-spektroskopisch bzw. massenspektrometrisch charakterisiert. Die in äußerst geringen Ausbeuten anfallenden Verbindungen sind luft- und lichtempfindlich.
    Additional Material: 2 Tab.
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Biologie in unserer Zeit 8 (1978), S. 192-193 
    ISSN: 0045-205X
    Keywords: Life and Medical Sciences
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
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  • 6
    ISSN: 0045-205X
    Keywords: Life and Medical Sciences
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
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  • 7
    ISSN: 0045-205X
    Keywords: Life and Medical Sciences
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 109 (1976), S. 2503-2509 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthese of Heterocyclic Compounds, CXC; Reactions of Cyclic Oxalyl Compounds, XV: A Simple Synthesis of 2,3,4,5-Tetrahydro-1H-1,3-diazepine-2,4,5-trionesThe H⊕-catalyzed reaction of 4-benzoyl-5-phenyl-2,3-dihydro-2,3-furandione (1) with an excess of arylisocyanates or di-p-tolylcarbodiimide (molar ratio 1:4) gives the 2,3,4,5-tetrahydro-1H-1,3-diazepine-2,4,5-triones 3. The constitutions of 3 are confirmed by alkaline hydrolysis and condensation with aniline. Heating of 3 in dry decalin yields the 4-[α-(arylimino)benzyl]-4-pyrroline-2,3-diones 7, decomposition of 3a at 220-230°C leads to the formation of 2,4-diphenyl-3-quinolineglyoxylanilide (5) and the 4-pyrrolin-2-one derivative 6.
    Notes: 4-Benzoyl-5-phenyl-2,3-dihydro-2,3-furandion(1) setzt sich mit Arylisocyanaten bzw. Di-p-tolyl-carbodiimid (Molverh. 1:4) unter H⊕-Katalyse zu den 2,3,4,5-Tetrahydro-1H-1,3-diazepin-2,4,5-trionen 3 um, deren Konstitution auch durch alkalische Hydrolyse bzw. Reaktion mit Anilin gesichert wird. Die Thermolyse von 3 in wasserfreiem Decalin liefert nach Arylisocyanat-Verlust die 4-[α-(Arylimino)benzyl]-4-pyrrolin-2,3-dione 7, bei trockenem Erhitzen Von 3a auf 220 bis 230°C bildet sich das 2,4-Diphenyl-3-chinolinglyoxylanilid (5) neben dem 4-Pyrrolin-2-on-Derivat 6.
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 420 (1976), S. 285-291 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal arid Molecular Structure of 2,5-Diiodine-3,4-diethyl-1,2,5-thiadiboroleneThe title compound crystallizes in the triclinic space group P1 with a = 8.22, b = 8.33, c = 9.745 Å, α = 109.1°, β = 107.1°, γ = 102.9° and two molecules per unit cell. The two molecules are associated by a center of symmetry, forming a four-membered B-S ring, which leads to differently coordinated boron atoms in the thiadiborolene ring. The bond lengths and angles for the boron atoms are similar to those known for trigonally and tetrahedrally bonded boron, respectively. The five-membered ring is nearly planar.
    Notes: Die Verbindung kristallisiert in der triklinen Raumgruppe P1 mit a = 8,22, b = 8,33, c = 9,745 Å, α = 109,1°, β = 107,4°, γ = 102,9° und 2 Molekülen in der Elementarzelle. Die beiden Molekeln sind über ein Symmetriezentrum unter Bildung eines B—S-Vierrings miteinander verknüpft, so daß sich zwei verschieden koordinierte Bor-Atome im Fünfring ergeben. Die Bindungslängen und -winkel an den beiden Bor-Atomen stimmen recht gut mit den für drei- bzw. vierfach koordiniertes Bor bekannten Werten überein. Der Fünfring ist nahezu planar.
    Additional Material: 3 Ill.
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 111 (1978), S. 1180-1194 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: New 1,3,2,4-DiazadiphosphetidinesThe 1,3,2,4-diazadiphosphetidines 5a-f are easily prepared by the reaction of chlorobis(dialkylamino)phosphanes with sodium bis(trimethylsilyl)amide. Further oxidation reactions by O2, S8, N3Si(CH3)3, and alkyl halides are tested in detail in the case of 5a. As shown by NMR spectroscopy, 5a-f are obtained from synthesis almost exclusively as cis isomers which on thermal treatment form a mixture of cis and trans isomers. Methoiodide adducts 9a-f show this isomerisation as well.
    Notes: Die Reaktion von Chlorbis(dialkylamino)phosphanen mit Natrium-bis(trimethylsilyl)amid eröffnet einen bequemen Weg zu den 1,3,2,4-Diazadiphosphetidinen 5a-f, deren Erst- und Zweitoxidation durch O2,S8, N3Si(CH3)3 und Alkylhalogenide am Beispiel von 5a ausführlicher untersucht wird. 5a-f fallen bei der Darstellung fast ausschließlich als cis-Isomere an, die thermische Behandlung führt  -  wie NMR-spektroskopisch gezeigt wird  -  zu einem cis-trans-Isomerengemisch. Auch die Methoiodide 9a-f zeigen cis-trans-Isomerisierung.
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