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  • Inorganic Chemistry  (37)
  • Wiley-Blackwell  (37)
  • Cambridge University Press
  • 1990-1994  (37)
  • 1980-1984
  • 1955-1959
  • 1993  (37)
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  • Wiley-Blackwell  (37)
  • Cambridge University Press
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  • 1990-1994  (37)
  • 1980-1984
  • 1955-1959
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  • 1
    Electronic Resource
    Electronic Resource
    Flow-Vacuum Pyrolysis of Polycyclic Compounds, 6. Pyrolysis of Dibenzo [CH]8 Hydrocarbons (1993)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 2513-2517 
    Details
    ISSN: 0009-2940
    Keywords: Dibenzo [CH]8 hydrocarbons ; Flow-vacuum pyrolysis ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The flow-vacuum pyrolysis of dibenzo [CH]8 hydrocarbons 2,3,4, and 5 are studied at 1 Torr and in the temperature range between 400 and 650°C. The following new transformations have been observed: 2⇆4, 2→5, 3→5, 3⇆4, 3→2, 5→11, the last three presenting analogies in the [CH]8 and/or benzo [CH]8 series. A reaction mechanism is suggested.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19931261127
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  • 2
    Electronic Resource
    Electronic Resource
    Mößbauer- und Neutronenbeugungs-Messungen an Li6FeCl8 (1993)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 619 (1993), S. 901-904 
    Details
    ISSN: 0044-2313
    Keywords: Iron chlorides, lithium ; Mößbauer spectra ; neutron diffraction ; Suzuki type ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Mößbauer and Neutron Diffraction Studies on Li6FeCl8On Suzuki-Type Li6FeCl8 Mößbauer spectra and neutron powder diffraction data are presented. The Suzuki-type structure (space group Fm3m, Z = 4, 1 031.11(1) pm) was supported refining by the Rietveld method (program PROFIL) to a final R1 = 6.8%. The Mößbauer spectra confirm the ideal octahedral coordination of the Fe2+ ions (no quadrupole splitting). The isomer shift of 1.097(1) mm s-1 at 295 K resembles those of other ferrous chlorides. At temperatures above the phase transition to deficient NaCl-type solid solution the half-width of the Mößbauer signal strongly increases.
    Notes: Die Mößbauer-Spektren und Neutronenpulver-Strukturdaten der Suzukiphase Li6FeCl8 werden mitgeteilt. Die Struktur (Raumgruppe Fm3m, Z = 4, a = 1 031,11(1) pm) konnte mit Hilfe des Rietveld-Verfahrens (Programm PROFIL) bis zu einem R-Wert R1 = 6,8% verfeinert werden. Die Mößbauer-Spektren ergeben eine exakt oktaedrische Umgebung von Fe2+ (keine Quadrupol-Aufspaltung). Die Isomerieverschiebung (1,097(1) mm s-1 bei 295 K) entspricht der anderer Eisen(II)chloride. Bei Temperaturen oberhalb der Phasenumwandlung zum defizienten NaCl-Typ-Mischkristall nimmt die Halbwertsbreite des Mößbauer-Signals zu.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19936190517
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  • 3
    Electronic Resource
    Electronic Resource
    Metallorganische Verbindungen der Lanthanoide, 73. Synthese und Struktur neuer Monocyclooctatetraenyl-Komplexe von Yttrium, Terbium und LutetiumHerrn Professor Ulrich Wannagat zum 70. Geburtstag gewidmet. (1993)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 907-912 
    Details
    ISSN: 0009-2940
    Keywords: Cyclopentadienyl complexes ; Cyclooctatetraenyl complexes ; Yttrium compounds ; Terbium compounds ; Lutetium compounds ; Lanthanoides, organo-, alkoxides ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Organometallic Compounds of the Lanthanoids, 73[1]. - Synthesis and Structure of New Monocyclooctatetraenyl Complexes of Yttrium, Terbium, and Lutetium[(C8H8)Ln(μ1-Cl)(THF)]2 (Ln=Y, Lu) react with NaOR (R=Ph, C6H3Me2-2,6) to give the dinuclear cyclooctatetraenyl rare earth alkoxides [(C8H8)Ln(μ1-OR)(THF)]2 [R=Ph, Ln=Y (1a), Lu (1b); R=C6H3Me2-2,6, Ln=Y (2a), Lu (2b)]. The reactions of [(C8H8)Ln(μ1-Cl)(THF)]2 with LiOC(tBu)3, NaOSiPh3, and NaC5H3tBu2 result in the formation of (C8H8)LnOC(tBu)3(THF) [Ln=Y (3a), Lu (3b)], (C8H8)LnOSiPh3(THF) [Ln=Y (4a), Lu (4b)], and (C8H8)Tb(C5H3tBu2) (5), respectively. Treatment of (C8H8)Y(C5Me5) with acetylacetone yields (C5Me5)Y(acac)2 (6). The 1H-and 13C-NMR and mass spectra of the new compounds as well as the X-ray crystal structures of 1a and 5 are discussed.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19931260409
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  • 4
    Electronic Resource
    Electronic Resource
    Dreizentren-oxidative Addition von Phosphor-Yliden an Ru3(CO)12 (1993)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 355-363 
    Details
    ISSN: 0009-2940
    Keywords: Ruthenium clusters ; Phosphorus ylides ; Oxidative addition ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Three-Centre Oxidative Addition of Phosphorus Ylides to Ru3(CO)12Phosphorus ylides undergo oxidative addition to Ru3(CO)12 to yield a wide range of Ru3 clusters with triply bridging organic ligands derived from the ylides. Ph3P=CH2 forms HRu3(CO)9(μ31-Ph3P  -  CH  -  CO) (1) containing a phosphonio enolate. Ph3P=CH  -  CHO yields a product mixture containing the phosphonio enolate-bridged cluster and its PPh3 derivative 6, the phosphoniomethylidyne-bridged compound H2Ru3(CO)9(μ31-C  -  PPh3) (5), and the ketenylidene-bridged compound H2Ru3(CO)8(PPh3)(μ31-C  -  CO) (7). Thermal treatment converts the phosphonio enolate ligand (in 1) into the phosphoniomethylidyne ligand (in 5), and the latter into the ketenylidene ligand (in 7). With Ph3P=CH  -  C(O)Me and Ru3(CO)12 ortho1-metalated Ru3 derivatives 10, 11 of the phosphonio ketone R3P  -  C  -  C(O)Me are produced, and likewise with Ph3P=CH  -  COOEt the ortho1-metalated derivative 12 of the phosphonio ester R3P  -  C  -  CO2Et. Me3P=CH  -  COOtBu is oxidatively added to form HRu3(CO)9(μ31-Me3P  -  C  -  COOtBu) (13) bearing a phosphonio ester ligand.  -  The crystal structures of 6 and 13 are reported. The sequence of Ru3 clusters and the bonding modes of the μ3 ligands can be related to the surface reactions during Fischer-Tropsch catalysis.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19931260212
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  • 5
    Electronic Resource
    Electronic Resource
    Übergangsmetall-Silyl-Komplexe, 44. Darstellung der zweikernigen Silyl-Komplexe (CO)3(R3Si)Fe(μ-PR′R′′)Pt(PPh3)2 durch oxidative Addition von (CO)3(R′R′′HP)Fe(H)SiR3 an (C2H4)Pt(PPh3)2 (1993)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 17-21 
    Details
    ISSN: 0009-2940
    Keywords: Dinuclear complexes ; Iron complexes ; Platinum complexes ; Silyl complexes ; Phosphide bridges ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Transition Metal Silyl Complexes, 44.  -  Preparation of the Binuclear Silyl Complexes (CO)3(R3Si)Fe(μ-PR′R′′)Pt(PPh3)2 by Oxidative Addition of (CO)3(R′R′′HP)Fe(H)SiR3 to (C2H4)Pt(PPh3)2The complexes (CO)3(R′R′′HP)Fe(H)SiR3 (1) [PHR′R′′ = PHPh2, PH2Ph, PH2Cy; SiR3 = SiPh3, SiPh2Me, SiPhMe2, Si(OMe)3] react with Pt(C2H4)(PPh3)2 to give the dinuclear, silyl-substituted complexes (CO)3(R3Si)Fe(μ-PR′R′′)Pt(PPh3)2 (2) in high yields. Upon reaction of 2 (R = R′ R′′ = Ph) with CO, the PPh3 ligand at Pt being trans to the PPh2 bridge is exchanged, and (CO)3(Ph3Si)Fe(μ-PPh2)Pt(PPh3)CO (3) is formed. Complex 3 is characterized by an X-ray structure analysis. The rather short Fe  -  Si distance [233.9(2) pm] and the infrared spectrum of 3 indicate that the Fe  -  Pt bond is quite polar.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19931260104
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  • 6
    Electronic Resource
    Electronic Resource
    Metallorganische Lewis-Säuren, IL. Bis(acyl)1-verbrückte heterometallische Komplexe von Rhenium, Molybdän, Ruthenium und Kupfer (1993)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 933-940 
    Details
    ISSN: 0009-2940
    Keywords: Bis(acyl)1-bridged bimetallic complexes ; Rhenium complexes ; Molybdenum complex ; Ruthenium complex ; Copper complex ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Organometallic Lewis Acids, IL[1]. - Bis(acyl)1-Bridged Heterometallic Complexes of Rhenium, Molybdenum, Ruthenium, and CopperThe reaction of the metalla-β1-diketonate complex [(OC)41-Re[-C(Me)O]2][NMe4] with various organometallic Lewis acids yields the bis(acyl)1-bridged bimetallic complexes (OC)4 -Re[-C(Me)O-]2Re(CO)4 (1), (OC)4Re[-C(Me)O-]2MoCp(CO)2 (2), (OC)4Re[-C(Me)O-]2Ru(η31-C3 H5)(nbd) (nbd=norbor-nadiene) (3), [(OC)4 Re[-C(Me)O-]2Ru(PPh3)2 (CO)2][BF4] (4), and (OC)4 Re[-C(Me)O-]2Cu[-O(Me)C-]2Re(CO)4 (5), respectively. The structures of the compounds 1-5 have been determined by X-ray diffraction. They show different conformations of the six-membered ring Re[-C(Me)O-]2[M]. The molecular structure of complex 1 proves a “flipping” of the acyl ligands.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19931260413
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  • 7
    Electronic Resource
    Electronic Resource
    (R)1-(+)1-Pantolactone Acrylate as a Chiral Auxiliary in the Baylis-Hillman Reaction (1993)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 1477-1480 
    Details
    ISSN: 0009-2940
    Keywords: Baylis-Hillman reaction ; 1,3-Dioxan-4-ones, 5-methylene- ; Trichloroacetaldehyde ; Pantolactone ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 2,6-Dialkyl-5-methylene-1,3-dioxan-4-ones were prepared in good diastereomeric excess by treating pantolactone acrylate with a series of selected aldehydes in the Baylis-Hillman reaction. With benzaldehyde and trichloroacetaldehyde, non-cyclic products resulted. In the case of the latter aldehyde the α1-hydroxyalkyl acrylate 5b was isolated as a single diastereomer and its absolute configuration established by X-ray crystallography.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19931260631
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  • 8
    Electronic Resource
    Electronic Resource
    Synthese, Charakterisierung und Struktur von P7(t-Bu3Si)3 („Tris(supersilyl)heptaphosphan(3)“)Professor Hartmut Bärnighausen zum 60. Geburtstage gewidmet (1993)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 619 (1993), S. 453-460 
    Details
    ISSN: 0044-2313
    Keywords: Tris(tri-tert-butylsilyl)heptaphosphonortricyclane P7(t-Bu3Si)3 ; synthesis ; 31P{1H} NMR data ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis, Characterization, and Structure of P7(t-Bu3Si)3 („Tris(supersilyl)heptaphosphane(3)“Tris(tri-tert-butylsilyl)heptaphosphanortricyclane P7(t-Bu3Si)3 1 is obtained from the reaction of (t-Bu)3Si—Si(t-Bu)3 with white phosphorus and forms colorless to pale yellow thermostable crystals. 1 is identified by the complete analysis of its 31P{1H} NMR spectrum (A[MX]3 spin system) as well as by a single crystal structure determination (space group Pca21, a = 170.76(2)pm, b = 131.14(3)pm, c = 426.61(5)pm, α = β = γ= 90°, Z = 8 formula units in the elementary cell). The steric demand of the (t-Bu)3Si-Groups causes an increase of the exocyclic bond angles at the equatorial phosphorus atoms Pe, while it does not particularly influence the P7-skeleton. Chlorine (r.t.) and bromine (70°C) degrade the P7-cage of 1 with formation of PX3 and (t-Bu)3SiX (X = Cl, Br).
    Notes: Tris(tri-tert-butylsilyl)-heptaphosphanortricyclan P7(t-Bu3Si)3 1 entsteht durch Umsetzung von (t-Bu)3Si—Si(t-Bu)3 mit weißem Phosphor und bildet farblose bis blaßgelbe thermostabile Kristalle. Die Identität von 1 wird durch die vollständige Analyse des 31P{1H}-NMR-Spektrums (A[MX]3-Spinsystem) sowie durch eine Kristallstrukturbestimmung belegt. 1 kristallisiert in der Raumgruppe Pca21 mit Z = 8 Formeleinheiten; a = 170,76(2)pm, b = 131,14(3)pm, c = 426,61(5)pm, α = β = γ= 90°. Der erhöhte Raumbedarf der (t-Bu)3Si-Gruppen führt zu einer Aufweitung der exocyclischen Bindungswinkel an den äquatorialen Phosphoratomen Pe ohne das P7-Gerüst besonders zu beeinflußen. Chlor (Raumtemperatur) und Brom (70°C) bauen den P7-Käfig von 1 unter Bildung von PX3 und (t-Bu)3SiX (X = Cl, Br,) ab.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19936190305
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  • 9
    Electronic Resource
    Electronic Resource
    Neue Halogenozinkate(II) M2IZnX4 (MI = Li, Na; X = Cl, Br) mit OlivinstrukturProfessor Heinrich Nöth zum 65. Geburtstage gewidmet (1993)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 619 (1993), S. 993-998 
    Details
    ISSN: 0044-2313
    Keywords: Bromozincates ; zinc ; olivine-type halides ; neutron diffraction ; fast ionic conductivity ; Raman spectra ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: New Halogenozincates M2IZnX4 (MI = Li, Na; X = Cl, Br) of Olivine TypeThe hitherto unknown tetrabromozincates Li2ZnBr4 and Na2ZnBr4 have been prepared. Quaternary halides Li2Zn(Cl, Br)4 and Li2Zn(Br, I)4 have been not obtained due to decomposition to mixtures of LiCl and ZnBr2, and LiBr and ZnI2. The crystal structures of the olivine-type bromides and of the high-temperature polymorph of Li2ZnCl4 have been determined by neutron powder diffraction using the Rietveld method (space group Pnma, Z = 4, a = 1 360.41(4), b = 788.47(2), c = 647.07(2) pm, RI = 9.07% (Li2ZnBr4), a = 1 446.32(5), b = 853.02(3), c = 676.61(2) pm, RI = 9.29% (Na2ZnBr4), a = 1 277.60(3), b = 741.76(2), c = 611.10(1) pm, RI = 7.63% (Li2ZnCl4)). The Raman spectra as well as the results of thermal analyses (DSC) and conductivity measurements (impedance spectroscopy) are presented and discussed. Contrary to Li2ZnCl4, Li2ZnBr4 and Na2ZnBr4 do not undergo any phase transition between 20°C and their melting points.
    Notes: Die Darstellung der bisher nicht bekannten Tetrabromozinkate Li2ZnBr4 und Na2ZnBr4 wird beschrieben. Quaternäre Halogenide des Typs Li2Zn(Cl, Br)4 bzw. Li2Zn(Br, I)4 konnten nicht erhalten werden. Es erfolgt Entmischung zu LiCl und ZnBr2 bzw. LiBr und ZnI2. Die Kristallstrukturen der im Olivintyp kristallisierenden Bromide und der Hochtemperaturform von Li2ZnCl4 wurden auf der Basis von Neutronenpulver-Messungen nach der Rietveld-Methode bestimmt (Raumgruppe Pnma, Z = 4, a = 1 360,41(4), b = 788,47(2), c = 647,07(2) pm, RI = 9,07% (Li2ZnBr4), a = 1 446,32(5), b = 853,02(3), c = 676,61(2) pm, RI = 9,29% (Na2ZnBr4), a = 1 277,60(3), b = 741,76(2), c = 611,10(1) pm, RI = 7,63% (Li2ZnCl4)). Raman-Spektren sowie das Ergebnis thermoanalytischer Untersuchungen (DSC) und Leitfähigkeitsmessungen (Impedanz-Spektroskopie) werden mitgeteilt. Li2ZnBr4 und Na2ZnBr4 zeigen im Gegensatz zu Li2ZnCl4 zwischen 20°C und dem Schmelzpunkt keine Phasenumwandlung.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19936190606
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  • 10
    Electronic Resource
    Electronic Resource
    Beiträge zur Chemie des Phosphors. 225 [1, 2] Lithium-pentahydrogenoctaphosphidProfessor Ulrich Wannagat zum 70. Geburtstage gewidmet (1993)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 619 (1993), S. 1007-1011 
    Details
    ISSN: 0044-2313
    Keywords: Lithium Pentahydrogen Octaphosphide ; 7-Lithium-2,5,6-trihydrogen-3-phosphino-bicyclo[2.2.1]heptaphosphide ; Hydrogen Polyphosphides ; Polycyclic Phosphorus Anions ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Phosphorus. 225. Lithium Pentahydrogen OctaphosphideLithium pentahydrogen octaphosphide, LiH5P8 (1), belongs to the first reaction products of the metallation of P2H4 with n-butyllithium to be detected. Compound 1 is also formed in the reactions of the tricyclic heptaphosphide Li3P7 or the monocyclic pentaphosphide LiH4P5 with P2H4. In all cases, LiH4P7, LiH8P7, and further not yet identified polyphosphides are formed additionally. The composition and the structure of 1 have been elucidated by 31P-NMR studies, above all a complete analysis of its low-temperature 31P{1H}-NMR spectrum. Hence, compound 1 is 7-lithium-2,5,6-trihydrogen-3-phosphino-bicyclo[2.2.1]heptaphosphide and has a norbornane-type P7 skeleton. At room temperature 1 decomposes to furnish more phosphorus-rich lithium polyphosphides.
    Notes: Lithium-pentahydrogenoctaphosphid, LiH5P8 (1), gehört zu den ersten nachweisbaren Reaktionsprodukten der Metallierung von P2H4 mit n-Butyllithium. Verbindung 1 wird außerdem bei der Reaktion des tricyclischen Heptaphosphids Li3P7 oder des monocyclischen Pentaphosphids LiH4P5 mit P2H4 gebildet. In jedem Fall entstehen daneben LiH4P7, LiH8P7 und weitere, noch nicht charakterisierte Polyphosphide. Zusammensetzung und Struktur von 1 konnten durch 31P-NMR-Studien, vor allem eine vollständige Analyse des Tieftemperatur-31P{1H}-NMR-Spektrums, ermittelt werden. Demnach handelt es sich bei 1 um 7-Lithium-2,5,6-trihydrogen-3-phosphino-bicyclo[2.2.1]heptaphosphid mit einem Norbornan-analogen P7-Gerüst. Bei Raumtemperatur zersetzt sich 1 unter Bildung P-reicherer Lithiumpolyphosphide.
    Additional Material: 1 Ill.
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    URL: http://dx.doi.org/10.1002/zaac.19936190609
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