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  • General Chemistry  (11)
  • X-ray Structure  (2)
  • 1,3-Azaphosphaallyl Anion  (1)
  • Alkali Metal Toluene Adducts  (1)
  • Barium 1-Aza-3-phosphapropenide  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Coordination Modes of 2,5-Di(tert-butyl)pyrrolide - Crystal Structures of HPyr*, Pyr*H·thf, (thf)2LiPyr*, and [(Me3Si)3C-Zn]2(μ-Cl)(μ-Pyr*) (Pyr* = 2,5-tBu2NC4H2) (1998)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1998 (1998), S. 1175-1182 
    Details
    ISSN: 1434-1948
    Keywords: Hydrogen bonds ; Indium ; Lithium ; Nitrogen heterocycles ; Zinc ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The lithiation of 2,5-di(tert-butyl)pyrrole (1) yields bis(tetrahydrofuran)lithium 2,5-di(tert-butyl)pyrrolide (2), which is monomeric in solution as well as in the solid state. Due to the coordination number of three for the lithium atom, short Li-O and Li-N bond lengths of 193 pm are observed. The metathesis reaction of 2 with tris(trimethylsilyl)-methylzinc chloride (3) gives colorless bis[tris(trimethyl-silyl)methylzinc] chloride 2,5-di(tert-butyl)pyrrolide (4). The pyrrolide ligand and the chlorine atom bridge the zinc atoms. One of the zinc atoms is bonded to the nitrogen atom of the pyrrolide substituent, while the other bonds to the opposite C-C bond. At 215 pm, the Zn-N bond is very long compared to those in alkylzinc amides, whereas the Zn-C distances lie in the range of Zn-C bond lengths found between zinc and η5-bonded cyclopentadienide ligands. The molecular structures of 1 and of the low-melting THF adduct 1·thf show a similar 2,5-di(tert-butyl)pyrrole molecule, but in the latter case a weak N-H···O bond is observed (N-H 97 pm, O···H 199 pm).
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    (RPNCH3)4, Cyclotetra(λ3-phosphazane) - Synthese und Kristallstrukturanalyse (1977)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 89 (1977), S. 423-424 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19770890623
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  • 3
    Electronic Resource
    Electronic Resource
    TlI[C(SiMe3)3] - eine Alkylthallium(I)-Verbindung mit einem verzerrten Tetraeder aus Tl-Atomen im FestkörperDiese Arbeit wurde von der Deutschen Forschungsgemeinschaft und vom Fonds der Chemischen Industrie gefördert. (1997)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 109 (1997), S. 64-66 
    Details
    ISSN: 0044-8249
    Keywords: Cluster ; Hauptgruppenelemente ; Niedervalente Verbindungen ; Thallium ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19971090114
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  • 4
    Electronic Resource
    Electronic Resource
    [Ga4{C(SiMe3)3}4] mit tetraedrischem Ga4-GerüstDiese Arbeit wurde von der Deutschen Forschungsgemeinschaft und dem Fonds der Chemischen Industrie gefördert. (1992)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 104 (1992), S. 1378-1380 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19921041016
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  • 5
    Electronic Resource
    Electronic Resource
    Bis(hypersilyl)zinn und Bis(hypersilyl)blei, zwei elektronenreiche Carben-HomologeHerrn Prof. Dr. G. Becker danken wir für seine großzügige Unterstützung. Zur Bezeichnung Hypersilyl siehe Zitat 5 in Lit. [10].Professor Peter I. Paetzold zum 60. Geburtstag gewidmet (1995)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 107 (1995), S. 1448-1451 
    Details
    ISSN: 0044-8249
    Keywords: Distannene ; Hypersilyl-Derivate ; Plumbylene ; Stannylene ; Chemistry ; General 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/ange.19951071212
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  • 6
    Electronic Resource
    Electronic Resource
    Tetrakis(hypersilyl)dithallium(Tl-Tl) - eine Verbindung des zweiwertigen ThalliumsZur Bezeichnung „Hypersilyl„ siehe Lit. [5]. (1994)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 106 (1994), S. 721-723 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General 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/ange.19941060631
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  • 7
    Electronic Resource
    Electronic Resource
    Molekül- und Kristallstruktur von Magnesium-bis[bis(trimethylsilyl)phosphanid] · DME (1994)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 304-308 
    Details
    ISSN: 0044-2313
    Keywords: Magnesium Bis[bis(trimethylsilyl)phosphide] · DME ; Phosphide ; X-ray Structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Molecular and Crystal Structure of Magnesium Bis[bis(trimethylsilyl)phosphide] · DMEMagnesium bis[bis(trimethylsilyl)phosphide] crystallizes in the tetragonal space group I4c2 with a = 1652.9(2); c = 2282.6(5) pm and Z = 8. The magnesium atom is distorted tetrahedrally surrounded by two oxygen and two phosphorus atoms with Mg—P- and Mg—O-bond lengths of 248.7(2) and 204.7(5) pm, respectively. The phosphorus atom displays a trigonal pyramidal coordination.
    Notes: Magnesium-bis[bis(trimethylsilyl)phosphanid] · DME kristallisiert in der tetragonalen Raumgruppe I4c2 mit a = 1652,9(2); c = 2282,6(5) pm und Z = 8. Das Magnesiumatom ist von zwei Sauerstoff- und zwei Phosphoratomen mit Mg—P- und Mg—O-Bindungslängen von 248,7(2) bzw. 204,7(5) pm verzerrt tetraedrisch umgeben. Das Phosphoratom ist trigonal pyramidal koordiniert.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19946200215
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  • 8
    Electronic Resource
    Electronic Resource
    Synthese und Molekülstruktur von Barium-bis[N,N′-bis(trimethylsilyl)benzamidinat] · DME · THF (1993)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 619 (1993), S. 1455-1461 
    Details
    ISSN: 0044-2313
    Keywords: Barium-bis[N,N′-bis(trimethylsilyl)benzamidinate] · DME · THF ; Benzamidinate ; X-ray Structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Molecular Structure of Barium Bis[N,N′-bis(trimethylsilyl)benzamidinate] ° DME ° THFBarium bis[N,N′-bis(trimethylsilyl)benzamidinate] · thf · dme crystallizes in the monoclinic space group P21/n with a = 1 122.0(2), b = 2 190.7(4), c = 1 840.2(3) pm, β = 98.04(1)° and Z = 4 containing a metal center in a distorted monocapped trigonal prismatic surrounding. The barium dibenzamidinate moiety is sent with an angle of 120°, although this leads to different Ba—N distances of 273 and 282 pm originating from the interligand repulsion of the trimethylsilyl groups and the dme substituent. The 1,3-diazaallyl fragment with C—N bond lengths of 132 pm shows a delocalisation of the anionic charge.
    Notes: Barium-bis[N,N′-bis(trimethylsilyl)-benzamidinat] · DME · THF kristallisiert in der monoklinen Raumgruppe P21/n mit a = 1 122,0(2), b = 2 190,7(4), c = 1 840,2(3) pm, β = 98,04(1)° und Z = 4 mit einem Metallzentrum in einer einfach überdachten, verzerrt prismatischen Umgebung. Die Barium-dibenzamidinat-Substruktur ist mit einem Winkel von 120° gewinkelt, die zwei jeweils verschiedenen Ba—N-Abstände von 273 und 282 pm rühren von der sterischen Hinderung zwischen den Trimethylsilyl-Gruppen und dem DME-Liganden her. Das 1,3-Diazaallyl-Fragment weist mit C—N-Bindungslängen von 132 pm eine Delokalisation der anionischen Ladung auf.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19936190822
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  • 9
    Electronic Resource
    Electronic Resource
    Über die Synthese von Tris(trimethylsilyl)silyl-kalium, -rubidium und -caesium und die Molekülstrukturen zweier Toluolsolvate (1993)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 619 (1993), S. 1777-1789 
    Details
    ISSN: 0044-2313
    Keywords: Metal Silyls ; Tris(trimethylsilyl)silyl Potassium ; Tris(trimethylsilyl)silyl Rubidium ; Tris(trimethylsilyl)silyl Cesium ; Alkali Metal Toluene Adducts ; X-ray Structures ; Spectroscopic Data ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: About the Synthesis of Tris(trimethylsilyl)silyl Potassium, Rubidium and Cesium and the Molecular Structures of two Toluene Solvates.Solventfree tris(trimethylsilyl)silyl potassium (1), rubidium (2) and cesium (3) are obtained by the reaction of the zink group bis[tris(trimethylsilyl)silyl] derivatives with the appropriate alkali metal in n-pentane. Addition of benzene or toluene to the colourless powders yields deeply coloured solutions. From these solutions single crystals of tris(trimethylsilyl)silyl rubidium - toluene (2/1) (2 a) and tris(trimethylsilyl)silyl cesium - toluene (2/3) (3 a) suitable for X-ray structure analysis are iso- lated [2a: orthorhombic; P212121; a = 1 382.1(3); b = 1 491.7(5); c = 2 106.3(6) pm; Z = 4 (dimers); 3a: orthorhombic; P212121; a = 2 131.0(6); b = 2 833.1(2); c = 925.2(2) pm; Z = 4 (dimers)]. The central structure moieties are folded four-membered Rb2Si2 and Cs2Si2 rings, respectively. Small Si—Si—Si angles (100 to 104°) on the one hand and extreme highfield 29Si-NMR shifts of the central silicon atoms on the other hand indicate a strong charge transfer from the alkali metal atoms to the tris(trimethylsilyl)silyl fragments, i.e. mainly ionic interactions between alkalimetal and silicon atoms.
    Notes: Die Umsetzung der Bis[tris(trimethylsilyl)silyl]-Derivate der Zink-Gruppe mit Kalium, Rubidium und Caesium in n-Pentan liefert Tris(trimethylsilyl)silyl-kalium (1), -rubidium (2) und -caesium (3) als farblose, pyrophore Pulver. Nach Zugabe von Benzol order Toluol zu den solvensfreien Verbindungen bilden sich lösliche, farbige Aromaten-Solvate. An den Addukten Tris(trimethylsilyl)silyl-rubidium - Toluol (2/1) (2 a) und Tris(trimethylsilyl)silyl-caesium - Toluol (2/3) (3 a) wurden Kristallstrukturanalysen durchgeführt [2a: orthorhombisch; P212121; a = 1 382,1(3); b = 1 491,7(5); c = 2 106,3(6) pm; Z = 4 (Dimere); 3a: orthorhombisch; P212121; a = 2 131,0(6); b = 2 833,1(2); c = 925,2(2) pm; Z = 4 (Dimere)]. Demzufolge liegen sie im Festkörper als dimere Moleküle mit viergliedrigen, gefalteten Rb2Si2-bzw. Cs2Si2-Ringen vor. Die mit 100 bis 104° relativ kleinen Si—Si—Si-Winkel deuten ebenso wie die im 29Si-NMR-Spektrum beobachtete extreme Tieffeldverschiebung der Resonanzen des zentralen Siliciumatoms auf eine weitgehende Ladungsübertragung von den Alkalimetallatomen auf das Tris(trimethylsilyl)silyl-Fragment, d. h. vorwiegend ionische Wechselwirkungen in den Ringen aus Alkalimetall- und Siliciumatomen hin.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19936191026
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  • 10
    Electronic Resource
    Electronic Resource
    Synthese, NMR-spektroskopische Charakterisierung und Struktur von Bis(1,2-dimethoxyethan-O,O′)barium-bis[1,3-bis(trimethylsilyl)-2-phenyl-1-aza-3-phosphapropenid] (1997)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 1237-1242 
    Details
    ISSN: 0044-2313
    Keywords: Barium 1-Aza-3-phosphapropenide ; 1,3-Azaphosphaallyl Anion ; NMR ; X-ray Structure Determination ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis, NMR Spectroscopic Characterization and Structure of Bis(1,2-dimethoxyethane-O,O′)barium Bis[1,3-bis(trimethylsilyl)-2-phenyl-1-aza-3-phosphapropenide]Barium-bis[bis(trimethylsilyl)phosphanide] 1 reacts with two equivalents of benzonitrile to give barium bis[1,3-bis(trimethylsilyl)-2-phenyl-1-aza-3-phosphapropenide]; the choice of the solvent determines whether a tris-(tetrahydrofuran)- or a bis(1,2-dimethoxyethane)-complex 2 can be isolated. 2 crystallizes from DME as red cuboids (monoclinic, C2/c, a = 1627.0(3), b = 1836.6(3), c = 1602.5(2) pm; β = 96.071(12)°; V = 4761.7(12); Z = 4; wR2 = 0.0851). The phosphorus atom displays a pyramidal surrounding in contrast to the planar coordination sphere of the nitrogen atom. In addition a twist within the P—C—N skeleton of the heteroallyl anion is observed.
    Notes: Barium-bis[bis(trimethylsilyl)phosphanid] 1 reagiert mit zwei Äquivalenten Benzonitril zu Barium-bis[1,3-bis(trimethylsilyl)-2-phenyl-1-aza-3-phosphapropenid]; durch die Wahl des Lösungsmittels läßt sich entweder der Tris(tetrahydrofuran)- oder der Bis(1,2-dimethoxyethan)-Komplex 2 isolieren. Verbindung 2 kristallisiert aus DME in Form roter Würfel aus (monoklin. C2/c, a = 1627,0(3), b = 1836,6(3), c = 1602,5(2) pm; β = 96,071(12)°; V = 4761,7(12); Z = 4; wR2 = 0,0851). Während die Koordinationssphäre des Stickstoffatoms planar ist, befindet sich das Phosphoratom in einer pyramidalen Umgebung. Zusätzlich beobachtet man im 1-Aza-3-phosphapropenid-Anion eine leichte Verdrillung.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19976230809
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