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  • 1
    Electronic Resource
    Electronic Resource
    Untersuchung des H/D-Austauschs und der Protonenresonanz von 6-Dimethylamino-fulvenen (1969)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 102 (1969), S. 243-254 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 6-Dimethylamino-fulven (1) wird von CH3OD im Sinne einer elektrophilen Substitution in 2- und 5-Stellung deuteriert; unter der Annahme einer Reaktion 1. Ordnung ergab sich in CH3OD/CDCl3 (3 : 1) bei 60° eine Halbwertszeit von 3.7 Stdn. H-3 und H-4 werden langsamer gegen Deuterium ausgetauscht, ebenso das Proton in der 4-Position von 6-Dimethylamino-2.3-benzo-fulven (15). Die π- und J-Werte von 1, 10, 15, 17 und 18 wurden ermittelt; die vicinalen Kopplungskonstanten der Fulvenprotonen erlauben Aussagen über die Beteiligung polarer Grenzstrukturen am Grundzustand.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19691020129
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  • 2
    Electronic Resource
    Electronic Resource
    (η-1,5-Cyclooctadien)(1-4-η-1-phenyl-1-borato-1,3-cycloheptadien)rhodium  -  ein Komplex mit einem neuartigen B-C-Liganden (1977)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 110 (1977), S. 1171-1174 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: (η-1,5-Cyclooctadiene)(1-4-η-1-phenyl-1-borato-1,3-cycloheptadiene)rhodium - a Complex with a Novel B-C LigandThe title complex 6 which represents the first example of the novel 1-4-η-1-borato-1,3-butadiene type structure is obtained by reaction of 1-phenyl-4,5-dihydro-1H-borepin with LiC(CH3)3 and [Rh(1,5-C8H12)Cl]2. The constitution of this 16-electron complex and the presence of a rhodiumboron bond is proved by spectroscopic methods.
    Notes: Der Titelkomplex 6, welcher das erste Beispiel des neuartigen 1-4-η-1-Borato-1,3-butadien-Strukturtyps darstellt, wird durch Umsetzung von 1-Phenyl-4,5-dihydro-1H-borepin mit LiC(CH3)3 und [Rh(1,5-C8H12)Cl]2 erhalten. Die Konstitution dieses 16-Elektronen-Komplexes und das Vorliegen einer Bor-Rhodium-Bindung wird mit spektroskopischen Methoden bewiesen.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19771100341
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  • 3
    Electronic Resource
    Electronic Resource
    Pentamethylcyclopentadienyl-Übergangsmetall-π-Komplexe, V1). (Pentamethylcyclopentadienyl)cobalt(III)-halogeno- und -amido-Komplexe (1984)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 117 (1984), S. 743-752 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Pentamethylcyclopentadienyl Transition Metal π-Complexes, V1). (Pentamethylcyclopentadienyl)cobalt(III)-halogeno- and -amido ComplexesOxidation of Co(II) complexes [CoCp'X]2) (3)2), X = Cl, Br, I, NH2, Cp' = η5-C5(CH3)5, in polar solvents, followed by NH4PF6 metathesis, yielded Co(III) complexes of the general formula [Cp'Co(μ-X,Y)3CoCp']PF6 (I), whereas the valence disproportionation of compounds 3 in unpolar solvents gave access to the molecular complex type [CoCp'X(μ-X)]2 (II)2). A solvent dependent equilibrium I ⇌ II is established when X = Cl, Br, I. NH2- and OH bridging ligands in type I complexes were substituted for Cl or CF3CO2 by treatment with the respective acids. The halogen bridges in I or II were split with donor ligands L to yield mononuclear complexes CoCp'X2L (L = CO, pyridine) or [CoCp'XL2]+ (L2 = bipyridine).
    Notes: Oxidation und anschließende NH4PF6-Metathese der Co(II)-Komplexe [CoCp'X]2 (3)2), X = Cl, Br, I, NH2, Cp' = η5-C5(CH3)5, in polaren Lösungsmitteln führt zu ionischen Co(III)-Komplexen [Cp'Co(μ-X,Y)3CoCp']PF6 (I), während die Valenzdisproportionierung der Verbindungen 3 in unpolaren Lösungsmitteln die molekularen Komplexe [CoCp'X(μ-X)]2 (II)2) liefert. Für X = Cl, Br, I, wird ein lösungsmittelabhängiges Gleichgewicht I ⇌ II nachgewiesen. NH2- und OH-Brücken in den Komplexen I werden durch Einwirkung der betreffenden Säuren gegen Cl- bzw. CF3CO2-Gruppen ausgetauscht. Die Halogenbrücken in beiden Komplextypen I und II werden durch Donorliganden L unter Bildung einkerniger Neutralkomplexe CoCp'X2L (L = CO, Pyridin) oder von Kationen [CoCp'XL2]+ (L2 = bipyridin) gespalten.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19841170227
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  • 4
    Electronic Resource
    Electronic Resource
    Pentamethylcyclopentadienyl-Übergangsmetall-π-Komplexe, VI1). Charakterisierung und Umsetzungen des (Pentamethylcyclo-pentadienyl)cobalt(III)-Restes in Wasser (1984)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 117 (1984), S. 753-762 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Pentamethylcyclopentadienyl Transition Metal π-Complexes, VI1). Characterization and Reactions of the (Pentamethylcyclopentadienyl)cobalt(III) Moiety in WaterHalogeno Co(III) complexes [CoCp'X2]2, Cp' = η5-C5Me5, X = Cl, Br (2a, b) in water spontaneously and completely yield solutions of CoCp'-aquo cations. Spectroscopic, electrochemical, and potentiometric investigations indicate a mononuclear cation [CoCp'aq]2+ ([3a]2+) in acidic (pH 〈 5) and a dinuclear hydroxo-bridged cation [(CoCp')2(OH)3]+ ([7]+) amongst other species in alkaline (pH 〉 9) solution, where the latter precipitates as the tetraphenylborate salt. From the above aqueous solutions a variety of novel Co(III) complexes such as [CoCp'X2]2, X = NCS, N3 (10, 11), or [CoCp'LnX3-n](n-1)+, L = H2O, bipy, X, or X2 = acac, S2C2(CN)2, o-C6H4(NH)O, CoCp(PO(OEt)2)3, Cl, CN, NO2 (12 - 19), were precipitated or extracted. The longest wavelenght absorption in the visible spectrum of all these complexes follows the spectrochemical series.
    Notes: Die Halogenokomplexe [CoCp'X2]2, Cp' = η5-C5Me5, X = Cl, Br (2a, b), bilden in Wasser spontan CoCp'-aqua-Kationen. Spektroskopische, elektrochemische und potentiometrische Messungen sprechen für ein einkerniges Kation [CoCp'aq]2+ ([3a]2+) in saurer (pH 〈 5) und ein zweikerniges hydroxoverbrücktes Kation [(CoCp')2 (OH)3]+ ([7]+), fällbar als Tetraphenylborat, neben weiteren Komplexen in alkalischer (pH 〉 9) Lösung. Aus den wäßrigen Lösungen lassen sich eine größere Anzahl neuer Co(III)-Komplexe [CoCp'X2]2, X = NCS, N3 (10, 11) bzw. [CoCp'LnX3-n](n-1)+, L = H2O, bipy, X oder X2 = acac, S2C2(CN)2, o-C6H4(NH)O, CoCp(PO(OEt)2)3, Cl, CN, NO2 (12-19) fällen oder extrahieren. Die Lage der längstwelligen Absorptionsbande folgt in allen diesen Komplexen der spektrochemischen Reihe.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19841170228
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  • 5
    Electronic Resource
    Electronic Resource
    Reduktion von (Cyclobutadien)(cyclopentadienyl)- und (1,5-Cyclooctadien)- (cyclopentadienyl)nickel-Kationen (1990)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 123 (1990), S. 227-237 
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    ISSN: 0009-2940
    Keywords: Nickel sandwich complex / Voltammetry, cyclic / Electrochemistry / Reductive dimerization / ESR spectra ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reduction of (Cyclobutadiene)(cyclopentadienyl)- and (1,5-Cyclooctadiene)(cyclopentadienyl)nickel CationsCyclic voltammetry of the four cationic Ni sandwich complexes [Ni(C5R5)(C4R4')]+ (2: R = H, R' = Ph; 3: R = H, R' = Me; 4; R = Me, R' = Ph; 5: R = R' = Me) shows reversible one-electron reductions for the phenyl derivatives 2 and 4 and a peak pattern characteristic of reductive dimerization/oxidative monomerization for the methyl derivatives 3 and 5. The product of the reduction of 3 was isolated and characterized analytically and by an X-ray structure determination as the dimer 6 of 3, linked through cyclobutenyl rings, the first example for a dimerization of an electron-rich sandwich complex at a substituted C atom. EPR spectra of the neutral complexes 2 and 4 are compared to those of (1,5-cyclooctadiene)(cyclopentadienyl)nickel (7) and are interpreted in terms of a substantial static Jahn-Teller distortion.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19901230202
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  • 6
    Electronic Resource
    Electronic Resource
    Organometallic Aqua Complexes, IIIPart II: Ref.[1].. Olefin Aqua Complexes of Rhodium(I) (1995)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 128 (1995), S. 911-917 
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    ISSN: 0009-2940
    Keywords: Rh coordination complex ; Organometallic aqua ions ; Olefin complex ; Olefin exchange ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Dehalogenation of halide precursors [(olefin)RhCl]2 [olefin = ethylene, 1,5-cyclooctadiene (COD], norbornadiene (NBD), 2,3-dimethylbutadiene (DMB)] in water gave the respective cis-diolefin aqua ions, characterized by NMR spectroscopy in solution. Attempted isolation of the tosylate salt [(COD)Rh-(H2O)2]OTs yielded crystals of (COD)Rh(H2O)(η1-OTs) characterized by X-ray structural analysis. [(NBD]Rh(H2O)2]SbF6 in the presence of adventitious toluene decomposed into [(NBD])Rh(η6-toluene)]SbF6 and [(NBD]2Rh]SbF6, both complexes were isolated and structurally characterized. Ethylene exchange in [(C2H4)2Rh(H2O)2]+ is fast with k2 of the order of 104-105 s-1 · M-1. The rate constant for water exchange in [CODRh(H2O)2]+ is estimated as 104 s-1 (ΔDLG≠173 ≍ 25 kJ/mol) at 173 K.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19951280910
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  • 7
    Electronic Resource
    Electronic Resource
    Synthesis, Structure, and Ligand Behavior of the 1,2-Diphosphaferrocene [η5-1,3-tBu2C5H3)(η5{3,4-(Me3Si0)2-5-(Me3Si)P2C3} Fe]Dedicated to Professor Manfred Regitz on the occasion of his 60th birthday. (1995)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 128 (1995), S. 665-671 
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    ISSN: 0009-2940
    Keywords: 1,2-Diphosphaferrocene ; Carbonylmetal complexes ; Metallo-diphosphapropene ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reaction of equimolar amounts of (η5-1,3-tBu2C5H3)(CO)-{3,4-(Me3SiO)2-5-(Me3Si)P2C3}Fe]2-FeP(SiMe3)2 with bis(trimethylsilyl)methylenechlorophosphane afforded the 1-metallo-1,2-diphosphapropene (η5-1,3-tBu2C5H3)(CO)2 FeP (SiMe3)P = C(SiMe3)2 (1b). Treatment of 1b with an excess of [(Z)-cyclooctene]Cr(CO)5 furnished 1,2-diphosphaferrocene (η5-1,3-tBu2C5H3)(η5-{1-[Cr(CO)5]-3,4-(Me3SiO)2-5-(Me3Si)P2C3}Fe (4b). Chromium complex 4b was freed from the pentacarbonylchromium fragment by heating with 1.5 equiv. of [Fe2(CO)9] in toluene solution at 80-90°C affording sandwich 5. In contrast, treatment of 4c with [Fe2(CO)9] in refluxing n-pentane yielded the trinuclear complex (η5-1,3-tBu2C5H3){η5-1,2-[Fe2(CO)7]-3,4-(Me3SiO)2-5-(Me3Si)P2C3}Fe (6). The ligation of sandwich 5 to the [Fe(CO)4] unit in 7 was achieved by irradiation with [Fe(CO)5] in n-pentane solution. A tricarbonylnickel adduct 8 resulted from the reaction of 4b with an excess of [Ni(CO)4] in toluene at ambient temperature. The molecular structures of the complexes 6 and 8 were established by single-crystal X-ray structure analyses. Cyclovoltammetric studies with 4b, 5, and 8 revealed an anodic shift of the oxidation potential when changing from 5 to 8 and 4.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19951280703
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  • 8
    Electronic Resource
    Electronic Resource
    Permethylmetallocene, III. Decamethylnickelocen: der Neutralkomplex, das Monokation, das Dikation und ihre Additionsreaktionen (1982)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 115 (1982), S. 1178-1196 
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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: Permethylmetallocenes, III. Decamethylnickelocene: the Neutral Sandwich Complex, the Monocation, the Dication, and their Addition ReactionsDecamethylnickelocene (1) unlike its unsubstituted analog nickelocene (2) and similar to the permethylated manganocene3) exists in three stable differently charged forms, i.e. as the neutral sandwich complex with 20 valence electrons, as the 19-electron monocation, and as the 18-electron dication. - 1 reacts with a wide variety of electrophiles RX to yield novel permethylated (cyclopentadienyl)(exo-R-cyclopentadiene)nickel cations, [3]+2), which in most cases are isolable as the hexafluorophosphate salts from water (e.g. R = H, CCl3, C6H5CO, C6H5CH2). The same type of cation is obtained from addition of nucleophiles (H-, CN-) to [1]2+ or of neutral radicals ((CH3)2(CN)C·, C6H5·) to [1]+. Addition of R from the exo side follows in all cases from the 1H NMR spectra of the diamagnetic salts [3]X. The latter are weakly electrophilic but in some cases react with strong nucleophiles like hydride or cyanide to give the neutral (cyclopentadienyl)(cyclopentenyl)nickel complexes 4. From [3k]+ (R = CN) base (tBuOK) abstracts a proton from a methyl group at C-1 of the cyclopentadiene ligand to form neutral (π1-3-4-cyano-1,2,3,4-tetramethyl-5-methylenecyclopentenyl)(pentamethylcyclopentadienyl)nickel (4e). The stereochemical and mechanistic aspects of the above reactions are discussed.
    Notes: Decamethylnickelocen (1) existiert, im Unterschied zum unsubstituierten Nickelocen (2) und ähnlich wie das permethylierte Manganocen3), in drei verschiedenen stabilen Ladungsstufen, nämlich als 20-Elektronen-Neutralkomplex, als 19-Elektronen-Monokation und als 18-Elektronen-Dikation. - Mit einer großen Anzahl von Elektrophilen RX reagiert 1 zu den neuartigen, permethylierten (Cyclopentadienyl)(exo-R-cyclopentadien)nickel-Kationen [3]+2), die in den meisten Fällen als Hexafluorophosphate aus Wasser gefällt werden können (z. B. R = H, CCl3, C6H5CO, C6H5CH2). Derselbe Kationentyp wird aus [1]2+ mit Nucleophilen (H-, CN-) und aus [1]+ durch Addition neutraler Radikale ((CH3)2(CN)C·, C6H5·) gebildet. Aus den 1H-NMR-Spektren der diamagnetischen Salze [3]X muß auf eine exo-Konfiguration des Restes R in allen Kationen [3]+ geschlossen werden. Die Kationen [3]+ sind schwach elektrophil und addieren Nucleophile wie das Hydrid- und das Cyanid-Ion zu neutralen (Cyclopentadienyl)(cyclopentenyl)nickel-Komplexen 4. Aus [3k]+ (R = CN) läßt sich mit Basen (tBuOK) aus der Methylgruppe an C-1 des Cyclopentadienringes ein Proton abstrahieren, wodurch neutrales (π1-3-4-Cyan-1,2,3,4-tetramethyl-5-methylencyclopentenyl)(pentamethylcyclopentadienyl)nickel (4e) entsteht. Die stereochemischen und mechanistischen Aspekte der obigen Reaktionen werden diskutiert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19821150334
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  • 9
    Electronic Resource
    Electronic Resource
    Pentamethylcyclopentadienyl-Übergangsmetall-Komplexe, X. Neue Co-Komplexe aus η5-C5Me5Co-Fragmenten und Acetylenen (1986)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 119 (1986), S. 116-128 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Pentamethylcyclopentadienyl Transition Metal Complexes, X. Novel Co Complexes from η5-C5Me5Co Fragments and AcetylenesThermal decomposition of Cp*Co(C2H4)2 (Cp* = η5-C5Me5) (2) in boiling n-hexane in the presence of acetylenes R—C≡C—R′ (R = R′ = Ph, 3a; R = H, R′ = Ph, 3b; R = R′ = CO2Me, 3c; R = R′ = SiMe3, 3d) yields in addition to the acetylene trimerization products (from 3a-c) the cobalt complexes Cp*Co[η4-C6(CO2Me)6] (6) and Cp*Co[η4-(CH2)2C4(CO2Me)4] (7) (from 3c) and from 3d the novel complex type (Cp*Co)2-(Me3SiC≡CSiMe3) (8). A somewhat different product pattern emerges from amalgam reduction of [Cp*CoCl]2 (1a) in the presence of acetylenes 3 where again 8 and the phenyl analog 11 are formed. Further products from this reaction are the cobaltole (Cp*Co)2[η4-C4(CO2Me)4] (9) and the cyclobutadiene complex Cp*Co[η4-C4(SiMe3)4] (10). Complex 6 is fluxional at room temperature with an activation barrier for the shift of the Cp*Co unit along the six-membered ring of 53 kJ/mol at 257 K. It is oxidized electrochemically in two discrete one-electron steps to an unstable dication where, according to electrochemical reversibility criteria, the flattening of the six-membered ring occurs concomitant with the first oxidation. Dimetallatetrahedranes 8 and 11 are oxidized electrochemically to transient monocations. The unsaturated character of the compounds is evidenced by facile and irreversible addition of CO and SO2 to the Co=Co double bond.
    Notes: Ethylenabspaltung aus Cp*Co(C2H4)2 (Cp* = η5-C5Me5) (2) in siedendem Hexan in Gegenwart von Acetylenen R—C°C—R′ (R = R′ = Ph, 3a; R = H, R′ = Ph, 3b; R = R′ = CO2Me, 3c; R = R′ = SiMe3, 3d) liefert neben den Acetylentrimerisierungsprodukten (aus 3a-c) für 3c die Komplexe Cp*Co[η4-C6(CO2Me)6] (6) und Cp*Co[η4-(CH2)2C4(CO2Me)4] (7) und für 3d den neuen Komplextyp (Cp*Co)2(Me3SiC≡CSiMe3) (8). Ein etwas anderes Produktspektrum ergibt sich bei der Amalgamreduktion von [Cp*CoCl]2 (1a) in Gegenwart der Acetylene 3. Neben 8 und der analogen Phenylverbindung (Cp*Co)2(PhC≡CPh) (11) wird die Bildung des Cobaltols (Cp*Co)2[η4-C4(CO2Me)4] (9) und des Cyclobutadienkomplexes Cp*Co[η4-C4(SiMe3)4] (10) beobachtet. 6 ist bei Raumtemperatur fluktuierend. Die 1H-NMR-spektroskopische Barriere für die 6-Ring-Verschiebung wird zu 53 kJ/mol bei 257 K gefunden. Elektrochemisch läßt sich 6 in zwei Schritten zum unbeständigen Dikation oxidieren, wobei die Einebnung des 6-Rings im Zuge der ersten Oxidation erfolgt. Die Dimetallatetrahedrane 8 und 11 lassen sich ebenfalls elektrochemisch zu Monokationen oxidieren. Ihr ungesättigter Charakter drückt sich in der irreversiblen Addition von CO und SO2 an die Co=Co-Doppelbindung aus.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19861190112
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  • 10
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    Electronic Resource
    Pentamethylcyclopentadienyl-übergangsmetallkomplexe, XI Metallorganische Monoglyoximato-Komplexe von Co und Rh (1987)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 120 (1987), S. 979-985 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reaction of the halide complexes [Cp*M(μ-Cl)Cl]2,M=Co, Rh, Cp*=η5-C5Me5, with dimethylglyoxime (dmgH2) gives organometallic monoglyoxime complexes Cp*Co(dmgH)Cl (2a) and [Cp*Rh(dmgH2)Cl]Cl (2b) with an η2-dimethylglyoximato(-1) or an η2-dimethylglyoxime ligand, the structures of which were analysed by X-ray crystallography. Potentiometric titration yielded pK5 values for the deprotonation of the glyoxime = N-OH groups and the metal bound water molecule in the hydrolyzed forms. Electroanalytical investigations show the compounds to be potentially useful mediators for catalytic proton reduction to hydrogen.
    Notes: Durch Umsetzung der Halogenide [Cp*M(μ-Cl)Cl]2, M=Co, Rh, Cp*=η5-C5Me5, mit Dimethylglyoxim (dmgH2) entstehen die Monoglyoxim-Komplexe Cp*Co(dmgH)Cl (2a) bzw. [Cp*Rh(dmgH2)Cl]Cl (2b) mit η2-Dimethylglyoximato(-1) bzw. η2-Dimethylglyoxim als Ligand, für die Kristallstrukturanalysen angefertigt wurden. Durch potentiometrische Titration wurden die pKs-Werte der Deprotonierung des dmgH2-Liganden und des metallgebundenen Wassers bestimmt. Elektroanalytische Untersuchungen weisen die Komplexe als potentielle Redoxkatalysatoren für die Protonenreduktion aus.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19871200615
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