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  • 1
    Electronic Resource
    Electronic Resource
    Ozonides of substituted norbornenes with exo- and endo-positioned peroxide bonds (1991)
    s.l. : American Chemical Society
    The @journal of organic chemistry 56 (1991), S. 4005-4008 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo00012a038
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  • 2
    Electronic Resource
    Electronic Resource
    Chalcogen Polycations by Oxidation of Elemental Chalcogens with Transition Metal Halides: Synthesis and Crystal Structure of [Se17][WCl6]2 (1995)
    s.l. : American Chemical Society
    Inorganic chemistry 34 (1995), S. 6202-6204 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic00128a036
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  • 3
    Electronic Resource
    Electronic Resource
    Metal Carbene, Metal Vinylidene, and Metal Alkyne Complexes: Reaction of Acetylides with (.eta.5-C5H5)M(CO)2(NO) (M = Cr, Mo, W) (1995)
    s.l. : American Chemical Society
    Organometallics 14 (1995), S. 3335-3341 
    Details
    ISSN: 1520-6041
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/om00007a038
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  • 4
    Electronic Resource
    Electronic Resource
    Dispiro-1,2,4-trioxolane durch Ozonolyse von Cycloalkylidencycloalkanen auf Polyethylen (1991)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 391-396 
    Details
    ISSN: 0009-2940
    Keywords: Ozonolysis ; Cycloalkylidenecycloalkanes ; Dispiro-1,2,4-trioxolanes ; Thermolysis ; Photolysis ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Dispiro-1,2,4-trioxolanes by Ozonolysis of Cycloalkylidenecycloalkanes on PolyethyleneOzonolyses of symmetrical (1b - d) and of unsymmetrical cycloalkylidenecycloalkanes (8a, b) afforded the dispiro-1,2,4-trioxolanes 4b - d and 9a, b, respectively. Their thermal decompositions gave mixtures of the cyclic ketones (3) and lactones (6). Photolyses afforded in addition to 3 and 6 the cyclic anhydrides 13, which are isomeric with the corresponding dispiro-1,2,4-trioxolanes.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19911240224
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  • 5
    Electronic Resource
    Electronic Resource
    Tellurium Cations by Lewis Acid-Base Reactions: Syntheses and Crystal Structures of (Te24⊕)Zr2Br210⊖ and (TeBr3p⊕)(Zr2Br9⊖) (1991)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 677-681 
    Details
    ISSN: 0009-2940
    Keywords: Bromozirconate(IV) ; Di-μ-bromooctabromodizirconate(2-) ; Tri-μ-Bromohexabromodizirconate(-) ; Tetratellurium(2+) ; Tribromotellurium(+) ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: ZrBr4 reacts with Te2Br in a sealed evacuated ampoule at 210°C in quantitative yield to afford (Te24⊕)(Zr2Br210⊖) as blueblack, moisture-sensitive crystals. The crystal-structure determination shows, that (Te4)(Zr2Br10) consists of planar, nearly square Te24⊕ and Zr2Br210⊖ ions, that form edge-sharing double octahedra. Both ions possess crystallographic 2/m (C2h) symmetry. At temperatures above 250°C (Te4)(Zr2Br10) decomposes with cleavage of Te -Te bonds into (TeBr3⊕)(Zr2Br9⊖), which forms yellow, hygroscopic crystals. (TeBr3)(Zr2Br9) can also be obtained by the reaction of two equivalents of ZrBr4 with TeBr4 at 260°C. The crystal structure is built of Zr2Br9⊖ ions, that form face-sharing double octahedra, and of pyramidal TeBr3⊕ ions. Each TeBr3⊕ ion exhibits three Te - Br contacts to two different Zr2Br9⊖ ions, resulting in a strongly deformed octahedral coordination for the Te atom. The Zr2Br9 double octahedra and the TeCl6 octahedra are connected by common edges and corners to infinite chains.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19911240402
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  • 6
    Electronic Resource
    Electronic Resource
    Tellurium Polycations by Oxidation of Tellurium with Tungsten Halides Syntheses and Crystal Structures of Te6(WOCl4)2 and Te6I2(WCl6)2 (1995)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 128 (1995), S. 23-27 
    Details
    ISSN: 0009-2940
    Keywords: cyclo-Hexatellurium(2+) ; 1,4-Diiodo-cyclo-hexatellurium(2+) ; Hexachlorotungstate(V) ; Tetrachlorooxotungstate(V) ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: WOCl4 reacts at 200°C with tellurium in a sealed, evacuated ampoule with the formation of Te6(WOCl4)2. The structure consists of six-membered tellurium rings in a boat conformation with significant transannular interactions and of pyramidal WOCl4 units which are linked by linear asymmetric O...;W=O bridges to polymeric (WOCl4)n, chains. The observed paramagnetism is consistent with the ionic formulation Te2+6[(WOCl-4)2]n. In the reaction of WCl6, I2 and Te in a 2:1:6 ratio Te6I2(WCl6)2 is formed at 150°C. The crystal structure consists of Te6I2+2cations and of slightly distorted octahedral WCl-6 anions. The Te6I2+2 ions are isostructural with Se6I2+2 and consist of a six-membered ring of Te atoms in the chair conformation with two I atoms bound in the 1,4-positions.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19951280104
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  • 7
    Electronic Resource
    Electronic Resource
    The Crystal Structure of Bi8(AlCl4)2 and the Crystal Structure, Conductivity, and Theoretical Band Structure of Bi6Cl7 and Related Subvalent Bismuth Halides (1996)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 129 (1996), S. 1219-1226 
    Details
    ISSN: 0009-2940
    Keywords: Bismuth subhalides ; Band structure and electrical conductivity of Bi6Cl7 ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The methods of preparation for Bi8(AlCl4)2 and Bi6Cl7 have been improved and the single crystal structures for these cluster compounds re-investigated and re-interpreted. In addition, conductivity measurements and band structure calculations using the tight-binding approximation have been performed on Bi6Cl7 and related subvalent bismuth halides. - Bi8(AlCl4)2 consists of isolated AlCl4- anions and rather undistored square-antiprismatic Bi82+ clusters with an average Bi-Bi distance of 3.10 Å. Relatively short intercluster Bi-Bi contacts of 3.90 Å suggest weak bonding interactions between the Bi82+ units. In contrast, the structure determination of Bi6Cl7 implies that this structure should be regarded as being composed of discrete Bi95+ clusters and a polymeric BiIII-Cl anionic lattice including infinite, distorted α1[Bi2Cl24+] chains. According to the experimental and theoretical results, the Bi6X7 (X = Cl, Br) family of subvalent bismuth halide compounds are anisotropic semiconductors along the crystallographic c axis. The conductivity is mediated by the onedimensional α1[Bi2Cl24+] chains. These are interconnected with the Bi95+ clusters, which are acting as electron reservoirs. The related BiX (X = Br, I) family of subvalent bismuth halides are shown to be anisotropic semiconductors in the crystallographic b direction.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19961291013
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  • 8
    Electronic Resource
    Electronic Resource
    Chalcogen Polycations with Mononuclear Divalent Anions from Chalcogen Subhalides and Tetrachlorides of Zr and Hf: Syntheses and Crystal Structures of Se4(MCl6) (M = Zr, Hf) and Te4(HfCl6) (1995)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 128 (1995), S. 763-766 
    Details
    ISSN: 0009-2940
    Keywords: cyclo-Tetraselenium(2+) ; cyclo-Tetratellurium(2+) ; Hexachlorozirconate(IV) ; Hexachlorohafnate(IV) ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Selenium, SeCl4, and MCl4 (M = Zr, Hf) react in a sealed evacuated glass ampoule at 130°C to afford red, moisture sensitive crystals of Se2+4(ZrCl2-6) and Se2-6(HfCl2-6). The isotypic crystal structures (tetragonal, P42/ncm, Z = 4) consist of square-planar Se2+4 cations and slightly distorted octahedral MCl2-6 (M = Zr, Hf) anions. The ions are packed corresponding to the NaCl structure type with the centres of gravity of the Se4 rings and the metal atoms of the MCl6 octahedra in the Na and Cl positions. From Te, TeCl4, and HfCl4 one obtains under similar conditions at 200°C Te2+4 (HfCl2-6) in form of dark violet crystals. The crystal structure (triclinic, P1, Z = 1) is built of nearly square-planar Te2+4 ions and octahedral HfCl2-6 ions. The packing of the ions corresponds to a rhombohedrally distorted CsCl structure type.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19951280804
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  • 9
    Electronic Resource
    Electronic Resource
    Tellurium Polycations Stabilized by Halogenobismutates - Syntheses and Crystal Structure of te4[bi6Cl20] and te4[bi2br8] (1997)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 130 (1997), S. 1189-1192 
    Details
    ISSN: 0009-2940
    Keywords: Tellurium ; Bismuth ; Tetratellurium(2+) ; Halogenobismutates(III) ; Crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The reaction of Te, TeX4 and BiX3 [X = Cl, Br] in sealed, evacuated glass ampoules in the temperature range 170° 100°C yields a variety of compounds composed of tellurium polycations and halobismutate anions. Two of these have been identified by crystal structure analyses as Te4[Bi6Cl20] (triclinic, P., a = 738.8(2), b = 875.1(2), c = 1389.1(6) pm, α = 87.89(2), β = 82.87(4), γ = 87.89(2) ·, Z = 1) and Te4[Bi2Nr8 (triclinic, P., a = 726.0(4), b = 773.7(4), c = 901.8(5) pm, α = 92.95(2), β = 102.23(2), γ = 92.87(2)., Z = 1). Both compounds were obtained as black crystals with a violet lustre and contain square-planar Te42+ cations. Te4[Bi6Cl20] contains a two-dimensional polymeric anion [Bi6Cl20]2- made up of corner- and edge-sharing BiCl6 octahedra with attached BiCl3 groups. The Bi-Cl distances vary over a very wide range from 245 to 334 pm. Te4[Bi2Br8] consists of a onedimensional chain [BiBr2Br4/2-[n of cis-edge-connected BiBr6 octahedra with Bi-Br distances ranging from 264 to 318 pm.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19971300904
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  • 10
    Electronic Resource
    Electronic Resource
    cis/trans-ozonides of cycloolefins (1995)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1995 (1995), S. 1993-1999 
    Details
    ISSN: 0947-3440
    Keywords: Ozonides ; Cycloolefins ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Ozonolyses in pentane of the unsubstituted cycloolefins having eleven-, twelve-, fourteen- and sixteen-membered rings (1b-e) and of cyclohexadecen-8-one (12) gave the corresponding cis- (2b-e; cis-15a) and trans-ozonides (3b-e; trans-15a), whereas cyclodecene (1a) gave only the corresponding cis-ozonide (2a). Ozonolyses on polyethylene of the dimethyl-substituted cycloolefins bearing fourteen- and sixteen-membered rings (7b, c) also afforded cis- and trans-isomeric ozonides (8, 9), whereas from the twelve-membered ring (7a) only the corresponding cis-ozonide (8a) was formed.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.1995199511279
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