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  • Inorganic Chemistry  (93)
  • 1990-1994  (53)
  • 1970-1974  (40)
  • 1992  (53)
  • 1974  (40)
  • 1
    Electronic Resource
    Electronic Resource
    Zur Existenz von Manganacetat-Dihydrat (1974)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 409 (1974), S. 345-352 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Existance of Mn (OCOCH3)2 · 2H2OThe existence of manganous acetate dihydrate is predicted and the conditions for its equilibrium existence are proved.The polyterms of solubility of the systems Mn(OCOCH3)2-H2O and Mn(OCOCH3)2- CH3COOH-H2O are studied at 40 and 60°C. The fields of equilibrium existence are determined for the acid manganous acetates of the composition 2 Mn(OCOCH3)2 · CH3COOH · 6H2O and Mn(OCOCH3)2 · CH3COOH · 1.5 H2O at 40°C as well as the fields of the acid salt of the composition Mn((OCOCH3)2 · CH3COOH · H2O a t 60°C. The crystallisation fields of Mn(OCOCH3)2 · 2H2O and Mn(OCOCH3)2 are determined a t 60°C. The results obtained are confirmed by X-ray investigation. The compositions of the solid phases are also determined from thermogravimetric studies.
    Notes: Die Existenz von Mn(OCOCH3)2 · 2 H2O wird vorausgesagt und die Bedingungen für seine Existenz im Gleichgewicht werden bestimmt.Untersucht werden die Löslichkeitsisothermen des Zweistoffsystems Mn(OCOCH3)2-H2O und des Dreistoffsystems Mn(OCOCH3)2-CH3COOH-H2O bei 40 und 60°C. Dabei werden Kristallisationsfelder saurer Acetate folgender Zusammensetzung festgestellt : 2 Mn(OCOCH3)2 · CH3COOH · 6H2O und Mn(OCOCH3)2 · CH3COOH · 1,5 H2O bei 40°C, sowie Mn(OCOCH3)2 · CH3COOH · H2O bei 60°C; bei 60°C ferner Kristallisationsfelder von Mn(OCOCH3)2 · 2H2O und Mn(OCOCH3)2. Diese Ergebnisse wurden auch röntgenographisch und thermogravimetrisch bestätigt.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19744090311
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  • 2
    Electronic Resource
    Electronic Resource
    The Catalytic Oxidation of Hydrogen on Nickel Oxides (1974)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 409 (1974), S. 106-114 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Katalytische Oxydation von Wasserstoff an NickeloxidenDie katalytische Oxydation von Wasserstoff an hochdispersen sowie gesinterten Nickeloxiden wurde mit einer statischen Methode untersucht und das Vorhandensein zweier verschiedener kinetischer Bereiche festgestellt. Zwischen 0 und 100°C war die anfängliche katalytische Aktivität nicht stationär, und eine stark vergiftende Wirkung des Reaktionsproduktes wurde bei allen Temperaturen bis zu 250°C beobachtet. Die Aktivierungsenergie der Reaktion, die auf den anfänglichen Reaktionsgeschwindigkeiten auf frisch entgasten Oxidoberflächen basiert, wies den kleinen Wert von 1-2 kcal . mol-1 bei beiden Präparaten auf. Im Temperaturbereich zwischen 250 und 350°C wurde eine stationär katalytische Aktivität beobachtet, und die Aktivierungsenergie der Reaktion lag bedeutend höher bei 12-15 kcal . mol-1.Der Wechsel in der Aktivierungsenergie wird mit der Wirkung von unterschiedlichen Sauerstoffarten der Katalysatoroberfläche, die in beiden Temperaturbereichen verschiedene Aktivitäten bei der Reaktion aufweisen, diskutiert. Eine Analogie zwischen der Kohlen- oxid- nnd Wasserstoffoxydation an Nickeloxid wird festgestellt sowie ein Kompensationseffekt für eine Reihe von Oxydationsreaktionen gezeigt.
    Notes: The catalytic oxidation of hydrogen on highly-dispersed and sintered nickel oxides has been studied by a static method and the existence of two different kinetic rcgions established. Between 0 and 100°C the initial catalytic activity was not ionary and a strong poisoning effect of the reaction product was observed at all temperatnres up to 250°C. The activation energy of the reaction based on the initial reaction rates on freshly- outgassed oxide surfaces had a low value of 1-2 kcal. mole-1 with both preparations. Between 250 and 350°C stationary catalytic activity was observed and the activation energy of the reaction was significantly higher, 12-14 kcal . mole-1.The change of the activation energy is discussed in terms of the participation in the reaction of oxygen species in the catalyst surface layer which have different reactivities in the two temperature regions. A close analogy is noted between the carbon monoxide and hydrogen oxidation reactions on nickel oxide and a compensation effect is illustrated for a series of oxidation reactions on the oxide.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19744090113
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  • 3
    Electronic Resource
    Electronic Resource
    Über den Einfluß von Temperatur und Fremdionen auf Eigenschaften und Bau der Natriumwasserglaslösungen (1992)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 614 (1992), S. 95-101 
    Details
    ISSN: 0044-2313
    Keywords: silicate solution ; water glass ; NMR spectroscopy ; dre adsorption ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Influence of Temperature and Impurities Addition on the Properties and the Constitution of Sodium Water Glass SolutionsSodium water glass (NaWG-)solutions of constant composition (SiO2/Na2O = 3,3; CSiO2 = 6,2 M) and different concentration of impurities (Fe, Al, Ti, Cu, chloride, sulfate) were investigated in dependence on temperature by means of the dye absorption method, 1H- and 23Na-NMR spectroscopy. It is shown, that the differences in the dye absorption spectra of normalized technical NaWG-solutions, mainly depend on the Fe-concentration in the solutions and their thermal history. From the results follow a crosslinking of polymeric silicate species by Fe—O—Si bonds and/or hydrogen bridges and a fully or partially degradation of these bonds at higher temperatures (150°C).
    Notes: Natriumwasserglas-(NaWG-)lösungen konstanter Zusammensetzung (SiO2/Na2O = 3,3; CSio2 = 6,2 M) und mit unterschiedlichen Fremdatomgehalten (Fe, Al, Ti, Cu, Chlorid, Sulfat) wurden in Abhängigkeit ihrer thermischen Vorbehandlung mit Hilfe der Farbstoffadsorptionsmethode sowie der 1H- und 23Na-NMR-Spektroskopie untersucht. Es zeigt sich, daß die Unterschiede in den Farbstoffspektren normierter technischer NaWG-Lösungen im wesentlichen von dem Fe-Gehalt der Lösungen und ihrer „thermischen Vergangenheit“ abhängen. Die Ergebnisse der Farbstoffmethode und NMR deuten darauf hin, daß in Fe-haltigen NaWG-Lösungen bei 80°C Vernetzungen der polymeren Silicatteilchen über Fe—O—Si-Bindungen und/oder Wasserstoffbrückenbindungen erfolgen, die bei höheren Temperaturen (150°C) wieder ganz oder teilweise gelöst werden.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19926140817
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  • 4
    Electronic Resource
    Electronic Resource
    Adsorptionsuntersuchungen an Organokieselsäurepolymeren (1992)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 612 (1992), S. 137-142 
    Details
    ISSN: 0044-2313
    Keywords: Adsorption and swelling ; isothermes ; specific surfaces ; organosilicic acid ; double four-ring silicate units ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Adsorption Studies on Organosilic Acid PolymersWe present four organosilic acid polymers containing double-4-ring silicate units cross-linked at different degree by different organosilicon bridges. BET surfaces were determined and adsorption isotherms of n-hexane, benzene, nitrogen and water were measured. All polymers are hydrophobic, one of them behaves microporously, the other are unporous. With organic adsorptives, swelling and adsorption occur simultaneously. Possible relations of microporosity and structure are discussed.
    Notes: BET-Oberflächen und Isothermen von n-Hexan, Benzen, Wasser und Stickstoff wurden an vier Organokieselsäurepolymeren vermessen, die sich im Vernetzungsgrad der Doppelvierring-Kieselsäureeinheiten Si8O20 und in der Struktur der Brücken unterscheiden. Ein Polymere ist mikroporös, die anderen sind unporös. Alle Polymere verhalten sich hydrophob. Neben der Adsorption tritt Quellung bei der Einwirkung organischer Adsorptive auf. Die Zusammenhänge zwischen der Länge der Brücken und der Porosität werden diskutiert.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19926120123
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  • 5
    Electronic Resource
    Electronic Resource
    Reaktionen an Indolderivaten, XXII. Yohimbanderivate durch stereoselektive Cyclisierung (1974)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 107 (1974), S. 975-978 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions with Indole Derivatives, XXII. Yohimban Derivatives by Stereoselective CyclisationStarting from an appropriately substituted cyclohexenyl-tetrahydroharmane derivative transformation into the pentacyclic ketone 9 is achieved in a rearrangement-cyclisation-sequence.
    Notes: Ausgehend von einem geeignet substituierten Cyclohexenyl-tetrahydroharmanderivat gelang die Überführung in das pentacyclische Keton 9, über eine Umlagerungs-Cyclisierungs-Sequenz.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19741070325
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  • 6
    Electronic Resource
    Electronic Resource
    Acylymine, III. Zur Reaktion der Acylimoniumsalze mit Grignard-Verbindungen (1974)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 107 (1974), S. 189-193 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Acylimines, III. The Reaction of Acylimonium Salts with Grignard ReagentsOrganometallic compounds add to the CN-double bond to acyclic acylimines and cyclic acylimonium salts without substituent to the carbon atom of the functional group (4a and 4n). 1-Oxo-2,3-diphenyl-1H-isoinodol-2-ium hexachloroantiomonate (4d) does not react with phenylmagnesium bromide, and 1-oxo-3-phenyl-1H-isoindol-2-ium salts 4c add phenylmagnesium bromide at the CO- and methylmagnesium iodide at the CN-double bond These results show that the reaction is strongly influenced by steric factors. The reaction of 4c and that of 9 with phenylmagnesium bromide yield the same products, indicating that 1-hydroxy-1,3-diphenyl-1H-isonidol (8) is an intermediate in both reactions.
    Notes: Während acyclische Acylimine und cyclische Acylimoniumsalze ohne substituent am Kohlen stoffatom der Funktionsgruppe (4a aud 4b) metallorganisch Verbindungen an der Cn-Doppelbindung addieren, reagiert 1-Oxo-2,3-diphenyl-1H-isoindol-2-ium-Salze 4c addieren Phenylmagnesiumbromid an der Co-Doppeldbindung, Methylmagnesiumjodid hingegen an der CN-Doppelbindung. Das deutet auf sterische Faktoren. Die Umsetzung des 3-Chlor-3-phenyl-1-isoindolinous (9) mit Phenylmagnesiumbromid entspricht der der salze 4c.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19741070124
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  • 7
    Electronic Resource
    Electronic Resource
    Oxidative Addition von Aldehyden und Schiffbasen an Ru3(CO)12 (1992)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 125 (1992), S. 1111-1118 
    Details
    ISSN: 0009-2940
    Keywords: Aldehyde reactions ; Ruthenium clusters ; Oxidative addition ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Oxidative Addition of Aldehydes and Schiff Bases to Ru3(CO)12Aldehydes show a wide variation of their reactive behaviour towards Ru3(CO)12. Aliphatic and simple aromatic aldehydes form simple oxidative addition products Ru3(CO)10(μ-H)(μ-RC = O) (1) either not at all or in low yields as impure compounds, while under forcing conditions dinuclear ruthenium μ-carboxylate complexes or the hydride H2Ru4(CO)13 are formed. Electron-rich aldehydes give good yields of cluster type 1 (R = p-MeOC6H4, p-Me2NC6H4, ferrocenyl). Schiff bases behave similarly, their oxidative addition products being Ru3(CO)10(μ-H)(μ-RC = NR′) (10, R = C6H5, p-MeOC6H4, p-Me2NC6H4, R′ = C6H5, p-MeC6H4). Of the ortho-substituted benzaldehydes, the methoxy compound produces clusters 6 and 7 resulting from aldehyde oxidative addition and aromatic ortho metalation. Salicylaldehyde and its p-tolylimine give the compounds Ru3(CO)8(μ-η2-OC6H4CH = X)2 (9, 11, X = O, NC6H4Me) with a bridging phenolate and a terminally bound aldehydic O or Schiff base NR function. 3-Pyridinecarbaldehyde reacts quickly with Ru3(CO)12 to give products 8 derived from pyridine CH rather than aldehyde CH oxidative addition. The crystal structures of 9 and 11 were determined.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19921250521
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  • 8
    Electronic Resource
    Electronic Resource
    Synthesis, Structure, and Reactivity of Chiral Rhenium Amido Complexes of the Formula (η5-C5H5)Re(NO)(PPh3)(NRR') (1992)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 125 (1992), S. 815-824 
    Details
    ISSN: 0009-2940
    Keywords: Rhenium complexes ; Amido ligands ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reactions of primary and secondary amine complexes [(η5-C5H5)Re(NO)(PPh3)(NHRR')]+ TfO- [2; R/R' = H/H (a), H/CH3 (b), H/C6H5 (d), CH3/CH3 (f), CH2CH2CH2CH2 (h)] with nBuLi give amido complexes (η5-C5H5)Re(NO)(PPh3)(NRR') (1) in quantitative NMR yields. Although 1 d can be isolated in pure form, 1 f is converted upon workup into a dimeric bridging bis(amido) complex, cis-[(η5-C5H5)Re(NO){μ-N(CH3)2}]2. The crystal structure of 1 d exhibits a pyramidal amido nitrogen atom. The diastereotopic methyl groups in 1 f readily exchange, as assayed by variable-temperature NMR. Complexes 1 a, f react with TfOH to regenerate 2a, f, and with TfOR” to give the corresponding alkylated amine complexes. The basicities and nucleophilicities of the amido nitrogen atoms are shown to be greater than those of organic amines.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19921250410
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  • 9
    Electronic Resource
    Electronic Resource
    Synthesis and molecular structure of tin(IV) 1-pyrrolecarbodithioates (1992)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 125 (1992), S. 1523-1528 
    Details
    ISSN: 0009-2940
    Keywords: 1-Pyrrolecarbodithioate derivatives ; Tin complexes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The 1-pyrrolecarbodithioate complexes of tin, PhSnCl(S2CNC4H4)2 (1) and Sn(S2CNC4H4)4 (2) have been synthesized and characterized by IR and NMR spectra (1H, 13C and 119Sn). δ119Sn suggests hexacoordination for 1 and an even higher coordination number for 2. X-ray structure determinations of these as well as of Me2Sn(S2CNC4H4)2 (3) have shown that 3 is one of the few known examples with a skew-trapezoidal bipyramidal configuration. 1 attains approximately a cis-octahedral geometry with two bidentate carbodithioate ligands with the Cl atom and the phenyl group in cis position. Complex 2 possesses two bidentate ligands while the other two are essentially anisobidentate leading to a structure between an octahedraon and a dodecahedron.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19921250702
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  • 10
    Electronic Resource
    Electronic Resource
    Synthese und Röntgenstrukturanalyse luftstabiler Bis[3-(dimethylamino)propyl]indium-Derivate (1992)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 125 (1992), S. 3-7 
    Details
    ISSN: 0009-2940
    Keywords: Indium, pentacoordinated organo compounds ; Intramolecular base stabilization ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis and X-ray Structural Analysis of Airstable Bis[3-(dimethylamino)propyl]indium DerivativesPentacoordinate, intramolecularly base-stabilized organoindium compounds [Me2N(CH2)3]2InBr (1), [Me2N(CH2)3]2InO2-CCF3 (2) and [Me2N(CH2)3]2InOC6F5 (3) as well as [Me2N-(CH2)3]2InC2H5 (4), [Me2N(CH2)3]2In(i-C3H7) (5), and [Me2N-(CH2)3]2In(t-C4H9) (6) have been prepared by the reaction of indium tribromide with 3-(dimethylamino)propyllithium and of bis[3-(dimethylamino)propyl]indium chloride with NaO2C-CF3, LiOC6F5, C2H5MgBr, i-C3H7MgBr, and t-C4H9Li, respectively. The 1H-, 13C-, 19F-NMR and mass spectra of the new compounds as well as the single-crystal X-ray structure analysis of 1 are described and discussed.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19921250102
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