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  • 1
    Electronic Resource
    Electronic Resource
    Notiz zur Metallkoordination von Äthoxycarbonyl-(4-nitrophenyl)carben (1975)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 108 (1975), S. 3412-3413 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19751081032
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  • 2
    Electronic Resource
    Electronic Resource
    Komplexchemie reaktiver organischer Verbindungen, XIV. Das Reaktionsverhalten aliphatischer Diazoverbindungen gegenüber Tricarbonyl(cyclopentadienyl)hydridomolybdän und -wolfram (1977)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 110 (1977), S. 896-915 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Complex Chemistry of Reactive Organic Compounds, XIV. The Reactions of Aliphatic Diazo Compounds with the Tricarbonyl(cyclopentadienyl) Hydrides of Molybdenum and TungstenDepending on their constitution, aliphatic diazo compounds 3 behave differently in their reactions with tricarbonyl(cyclopentadienyl)hydridomolybdenum (1) and -tungsten (2). Diazomethane (3a), diazoethane (3b), and 2-diazopropane (3c) are stabilized as alkane diazo ligands in complexes of the type C5H5M(CO)2[N2CHR1R2] (M = Mo: 6; M = W: 7). Phenyl-, (4-nitrophenyl)-, (4-methoxyphenyl)diazomethane (3d, e, f), and 9-diazofluorene (3g) form in clean reactions the carbene insertion products C5H5M(CO)3CHR1R2 (M = Mo: 4; M = W: 5), whereas ω-diazoacetophenone (3h) and diazodimedone (3i) yield the binuclear diazo complexes C5H5M(CO)3-M(CO)2C5H5[N2 = CR1R2] (M = Mo: 9; M = W: 10). Diethyl diazomalonate (3h) is coordinated as an imino-amido ligand in the coordination compound 14 which arises from a 1,1-insertion of 3k into the polar tungsten-hydrogen bond of 2.
    Notes: In ihrer Reaktivität gegenüber Tricarbonyl(cyclopentadienyl)hydridomolybdän (1) und -wolfram (2) weisen Diazoalkane 3 starke konstitutionsbedingte Unterschiede auf: Diazomethan (3a), Diazoethan (3b) und 2-Diazopropan (3c) werden als Alkandiazo-Liganden in Komplexen vom Typ C5H5M(CO)2[N2CHR1R2] (M = Mo: 6; M = W: 7) stabilisiert; Phenyl-, (4-Nitrophenyl)-, (4-Methoxyphenyl)diazomethan (3d, e, f) sowie 9-Diazofluoren (3g) bilden in glatten Reaktionen die Carben-Insertionsprodukte C5H5M(CO)3CHR1R2 (M = Mo: 4; M = W: 5), während ω-Diazoacetophenon (3h) wie auch Diazodimedon (3i) die zweikernigen Diazoketon-Komplexe C5H5M(CO)3-M(CO)2C5H5[N2 = CR1R2] (M = Mo: 9; M = W: 10) ergeben. Diazomalonsäure-diethylester (3k) wird im Zuge einer zur Koordinationsverbindung 14 führenden 1,1-Insertion in die polare Wolfram-Wasserstoff-Bindung von 2 als Imino-amido-Ligand komplexiert.
    Additional Material: 8 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19771100310
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  • 3
    Electronic Resource
    Electronic Resource
    Komplexchemie reaktiver organischer Verbindungen, XXII1) Metallorganische Cyclopentadienylierungen mit Diazocyclopentadienen. Synthesen von (η-Halogencyclopentadienyl)eisen-Komplexen (1978)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 111 (1978), S. 3124-3135 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Complex Chemistry of Reactive Organic Compounds, XXII: Organometallic Cyclopentadienylations with Diazocyclopentadienes. Syntheses of (η-Halocyclopentadienyl)iron ComplexesThe tetracarbonyliron halides (CO)4Fe(σ-C3F7)I (2) and (CO)4FeX2 [X = Br: 4; X = I: 5] react with diazocyclopentadiene (1a) and its derivatives 1b-e to yield (η-monohalocyclopentadienyl)iron complexes (η-C5R4X)Fe(CO)2L (3a-d, 6a, b, 8) [R = H, Cl, Br, C6H5; X = Br, I; L = C3F7, Br, I] and 1,1′-dibromoferrocene (7a). In addition to the analytical and spectroscopic characterization, the constitution of (η-C5H4I)Fe(CO)2I (6b) has been proved chemically.
    Notes: Die Tetracarbonyleisen-halogenide (CO)4Fe(σ-C3F7)I (2) und (CO)4FeX2 [X = Br: 4; X = 1: 5] reagieren mit Diazocyclopentadien (1a) und seinen Derivaten 1b-e unter Bildung der (η-Monohalogencyclopentadienyl)eisen-Komplexe (η-C5R4X)Fe(CO)2L (3a-d, 6a, b, 8) [R = H, Cl, Br, C6H5;X = Br, I;L = C3F7, Br, I] und von 1,1′-Dibromeferrocen (7a). Über die analytische und spektroskopische Charakterisierung der Produkte hinaus ist die Konstitution von (η-C5H4I)Fe(CO)2I (6b) auch chemisch bewiesen.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19781110913
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  • 4
    Electronic Resource
    Electronic Resource
    Komplexchemie reaktiver organischer Verbindungen, XXI: Über eine einfache Synthese der Rhenium-Halbsandwich-Komplexe (η-C5H4)Re(CO)3 [X = Cl, Br, I] (1978)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 111 (1978), S. 2458-2460 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Complex Chemistry of Reactive Organic Compounds, XXI: On a Simple Synthesis of the Halfsandwich Rhenium Complexes (η-C5H4X)Re(CO)3 [X = Cl, Br, I]Tricarbonyl(η-chlorocyclopentadienyl)rhenium (3a), (η-bromocyclopentadienyl)tricarbonylrhenium (3b), and tricarbonyl(η-iodocyclopentadienyl)rhenium (3c) are formed in one-step, high-yield syntheses by cyclopentadienylation of the corresponding pentacarbonylrhenium halides (CO)5ReX [X = Cl (1a), Br (1b), I (1c)] with diazocyclopentadiene (2).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19781110644
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  • 5
    Electronic Resource
    Electronic Resource
    Notiz zur Darstellung von Tricarbonyl(cyclopentadienyl)-(p-toluolsulfonamido)wolfram (1976)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 109 (1976), S. 3489-3491 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19761091029
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  • 6
    Electronic Resource
    Electronic Resource
    Übergangsmetall-Methylen-Komplexe, IV: Neue Methylen-Cobalt-Komplexe (1978)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 111 (1978), S. 1077-1082 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Transition Metal Methylene Complexes, IV: Novel Methylene Cobalt ComplexesDicarbonyl(η-cyclopentadienyl)cobalt (2) reacts with ethyl diazoacetate (3a), tert-butyl diazoacetate (3b), dimethyl diazomalonate (3c), and diethyl diazomalonate (3d) in boiling benzene to yield the dinuclear diamagnetic complexes [η-C5H5Co(CO)]2-μ-[C(R)(CO2R′)] (R = H, R′ = C2H5; 4a; R = H, R′ = tert-C4H9: 4b: R = CO2CH3, R′ = CH3: 5a: R = CO2C2H5, R′ = C2H5: 5b) in which the carbenes corresponding to 3a-d are stabilized as bridging ligands.
    Notes: Dicarbonyl(η-cyclopentadienyl)cobalt (2) reagiert mit Diazoessigsäure-ethylester (3a). Diazoessigsäure-tert-butylester (3b). Diazomalonsäure-dimethylester (3c) bzw. Diazomalonsäurediethylester (3d) in siedendem Benzol unter Bildung der zweikernigen diamagnetischen Komplexe [η-C5H5Co(CO)]2-μ-[C(R)(CO2R′)] (R = H, R′ = C2H5; 4a; R = H, R′ = tert-C4H9: 4b: R = CO2CH3, R′ = CH3: 5a: R = CO2C2H5, R′ = C2H5: 5b), in denen die 3a-d entsprechenden Carbene als Brückenliganden stabilisiert sind.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19781110326
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  • 7
    Electronic Resource
    Electronic Resource
    Mehrfachbindungen zwischen Hauptgruppenelementen und Übergangsmetallen, XXV. Aufbau und Reaktivität von Se1- und Se2-Brücken in Organochrom-Komplexen (1986)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 119 (1986), S. 1437-1440 
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    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Multiple Bonds Between Main Group Elements and Transition Metals, XXV. Synthesis and Reactivity of Se1- and Se2-Bridges in Organochromium CompoundsReaction of the ionic complex K[(η5-C5Me5)Cr(CO)3] (1) with selenium(I) with selenium(I) chloride, Se2Cl2, yields the diselenium compounds 2 of composition (η5-C5Me5)Cr(CO)5Se2 which is converted to the Se1 derivative (μ-Se)[η5-C5Me5)Cr2(CO)2]2 (3) with triphenylphosphane. 3 exhibits a linear, multiple bonded CrSeCr core structure. Reaction of 2 with diazomethane gives the novel mononuclear, paramagnetic selenoformaldehyde complex (η5-C5Me5)-Cr(CO)2(SeCH2) (4).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19861190430
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  • 8
    Electronic Resource
    Electronic Resource
    Chemie der Übergangsmetall-Heterocyclen-Komplexe, II. Synthese und Elektrochemie von Carbonylchrom-Komplexen der Bithiophen-Reihe (1986)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 119 (1986), S. 878-886 
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    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chemistry of Transition Metal Heterocyclic Complexes, II. Synthesis and Electrochemistry of Carbonyl Chromium Complexes in the Bithiophen SeriesThe (substituted) (bithiophene)tricarbonylchromium complexes 4a - g are formed in yields up to 95% upon treatment of tricarbonyltris(γ-picoline)chromium with 2,2′-bithiophene (1a) and its derivatives 1b - e and 1g, respectively, in the presence of the Lewis acid BF3. The oxidation of the new compounds, as investigated by means of cyclovoltammetry, is irreversible and effects decomposition of the complexes.
    Notes: Durch Umsetzung von Tricarbonyltris(γ-picolin)chrom (3) mit 2,2′-Bithiophen (1a) und seinen Derivaten 1b - e und 1g bilden sich in Gegenwart der Lewis-Säure BF3 die (substituierten) Bithiophen-Chromtricarbonyl-Komplexe 4a - g in Ausbeuten bis 95%. Die cyclovoltametrisch untersuchte Oxidation der neuen Verbindungen verläuft irreversibel unter Zerfall der Komplexe.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19861190312
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  • 9
    Electronic Resource
    Electronic Resource
    Mehrfachbindungen zwischen Hauptgruppenelementen und Übergangsmetallen, XXVII. Redox-Reaktionen an Chrom  -  Selen-Dreifachbindungen (1986)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 119 (1986), S. 3544-3557 
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    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Multiple Bonds Between Main Group Elements and Transition Metals, XXVII. Redox Reactions of Chromium-Selenium Triple BondsThe title complex μ-selenido-bis[dicarbonyl(η5-cyclopentadienyl)chromium] (1) reacts with reducing agents such as potassium superoxide and cobaltocene to yield novel mono- and multinuclear ionic complexes. Thus, compound 5 results from treatment of 1 with KO2 in the presence of [2.2.2]-cryptand in a solution of acetone; 5 contains the mononuclear complex anion [(η5-C5H5)Cr(CO)2(η2-Se2)]- (X-ray structure). In the reaction with cobaltocene, conducted in tetrahydrofuran/diethyl ether solution at -30°C, 1 is converted into the extremely oxygen-sensitive ionic compound 2 which, for the first time, reveals an organometallic species containing a planar Cr3Se-multiple bond system (X-Ray structure); 2 decomposes at room temperature to give both the tetrameric selenium complex 3 of composition [(C5H5)CrSe]4 (Cr4Se4 cubane-type structure) and the ionic compound [Co-(η5-C5H5)2]+ [(η5-C5H5)Cr(CO)3]- (4; X-Ray structure).
    Notes: Der Titelkomplex μ-Selenido-bis[dicarbonyl(η5-cyclopentadienyl)chrom] (1) reagiert mit Reduktionsmitteln wie Kaliumsuperoxid oder Cobaltocen zu neuartigen ein- und mehrkernigen Komplexsalzen. So ergibt KO2 in Gegenwart von [2.2.2]-Kryptand in Aceton-Lösung bei Raumtemperatur das Komplexsalz 5, welches das einkernige Komplexanion [(η5-C5H5)Cr(CO)2(η2-Se2)]- enthält (Röntgenstrukturanalyse). Mit Cobaltocen ergibt 1 bei -30°C in Tetrahydrofuran/Diethylether-Lösung das extrem sauerstoffempfindliche Komplexsalz 2, in dem erstmals eine Organometall-Spezies mit planarem Cr3Se-Mehrfachbindungssystem vorliegt (Röntgenstrukturanalyse). 2 zerfällt bei Raumtemperatur unter Bildung des tetrameren Selen-Komplexes 3 der Zusammensetzung [(C5H5)CrSe]4 (Cr4Se4-Cubanstruktur) und in den salzartigen Komplex [Co(η5-C5H5)2]+[(η5-C5H5)Cr(CO)3]- (4; Röntgenstrukturanalyse).
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19861191205
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  • 10
    Electronic Resource
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    Synthesen und Strukturen neuer Komplexes des 2,2′-Bipyridins mit Niob, Molybdän, Wolfram und Rhenium in hohen Oxidationsstufen (1990)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 123 (1990), S. 271-276 
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    ISSN: 0009-2940
    Keywords: Niobium complexes / Molybdenum complexes / Tungsten complexes / Rhenium complexes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Syntheses and Structures of New 2,2′-Bipyridine Complexes of Niobium, Molybdenum, Tungsten, and Rhenium in High Oxidation StatesExchange of oxo for chlorine ligands by means of hexamethyl-disiloxane provides an easy and effective synthesis of the oxo halides (bipy)MVOCl3 (bipy = 2,2′-bipyridine, C10H8N2; M = Nb, 1c; Re, 2c; W, 3c) and (bipy)MVIO2Cl2 (N = Mo, 6a;W, 6b). Starting from ReCl5 the structurally (X-ray) characterized byproduct (bipy)ReIVCl4 (2b) is also formed. Dirhenium heptaoxide (7) is converted into the complex (bipy)ReVIIO3Cl (8) upon treatment with chlorotrimethylsilane in the presence of 2,2′-bipyridine, thus being now easily available a key compound in rhenium chemistry. The new imido complexes of composition (bipy)MoVI(NR)2Cl2 [R = C(H3)3, 9a; C6H5, 9b] are accessible from 6a and the corresponding silylated amines. The rhenium and tungsten complexes 2b and 6b, resp., exhibit octahedral structures in the crystal, with that of 6b being distorted as a result of different ligands and intermolecular contacts.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19901230208
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