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  • 1
    Electronic Resource
    Electronic Resource
    Derivate des Borabenzols, I Kobalt-Komplexe des 1-Phenyl- und 1-Methylborinat-Ions1) (1972)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 105 (1972), S. 3413-3423 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Borabenzene Derivatives, ICobalt Complexes of 1-Phenylborinate and 1-Methylborinate Ions1)Derivatives of the unknown borabenzene (C5H5B, borin) become accessible by the reaction of Co(C5H5)2 with organoboron dihalides (C6H5BCl2, C6H5BBr2, CH3BBr2). Uncharged paramagnetic complexes Co(C5H5)(C5H5BR) and Co(C5H5BR)2 as well as diamagnetic cations [Co(C5H5)(C5H5BR)]- (R = C6H5, CH3) are described. In these novel transitionmetal π-complexes borinate ions [C5H5BR]- are bound to the metal as benzenoid hexahapto-ligands.
    Notes: Ein Weg zu Derivaten des unbekannten Borabenzols (C5H5B, Borin) wird durch die Reaktion von Co(C5H5)2 mit Organylbordihalogeniden (C6H5BCl2, C6H5BBr2, CH3BBr2) erschlossen. Paramagnetische Neutralkörper Co(C5H5)(C5H5BR) und Co(C5H5BR)2 sowie diamagnetische Kationen [Co(C5H5)(C5H5BR)]- (R = C6H5, CH3) werden beschrieben. In diesen Übergangsmetall-π-Komplexen neuen Typs sind Borinat-Ionen [C5H5BR]- als benzolähnliche Hexahapto-Liganden an das Metall gebunden.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19721051029
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  • 2
    Electronic Resource
    Electronic Resource
    Derivate des Borabenzols, X. Bildung von Borinato-Liganden aus einem 1-Bora-2,5-cyclohexadien-Derivat in Komplexen von Mangan, Rhenium und Eisen (1977)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 110 (1977), S. 1167-1170 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Borabenzene Derivatives, X. Formation of Borinato Ligands from a 1-Bora-2,5-cyclohexadiene Derivative in Complexes of Manganese, Rhenium, and IronBorinato complexes LMn(CO)3, LRe(CO)3, and FeL2 (3-5), where L is the 4-methyl-1-phenylborinato ligand, are obtained by thermal reaction of 4,4-dimethyl-1-pheny-1-bora-2,5-cyclohexadiene (1) with Mn2 (CO)10 and Re2(CO)10 and by thermolysis of tricarbonyl(4,4-dimethyl-1-phenyl-1-bora-2,5-cyclohexadiene)iron (2).
    Notes: Borinato-Komplexe LMn(CO)3, LRe(CO)3 und FeL2 (3-5), wo L der 4-Methyl-1-phenylborinato-Ligand ist, werden durch thermische Reaktion von 4,4-Dimethyl-1-phenyl-1 bora-2,5-cyclohexadien (1) mit Mn2(CO)10 und Re2(CO)10 und durch Thermolyse von Tricarbonyl-(4,4-dimethyl-1-phenyl-1-bora-2,5-cyclohexadien)eisen (2) erhalten.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19771100340
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  • 3
    Electronic Resource
    Electronic Resource
    Derivate des 1,4-Diborabenzols: Über die erste ionische 1,4-Diboratabenzol-Verbindung und Über übergangsmetall-Komplexe von 1,4-Dibora-2,5-cyclohexadienen (1982)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 115 (1982), S. 3115-3127 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Derivatives of 1,4-Diborabenzene: The First Ionic 1,4-Diboratabenzene Compound and Transition Metal Complexes of 1,4-Dibora-2,5-cyclohexadienesThe 1,4-dibora-2,5-cyclohexadiene FcB[CH=CH]2BFc (1h) (FcH = Fe(C5H5)2) is reduced by sodium amalgam to produce diamagnetic Na2[FcB[C2H2]2BFc] containing a novel 6π-electron anion. 17 transition metal complexes (4-8) of Co, Rh, Ni, and Pt with 1,4-dibora-2,5-cyclohexadiene ligands L (L = RB[C2H2]2BR) are described. Complexes with R = Fc and CH3O are obtained by complexation of 1h, its dianion, or CH3OB[CH=CH]2BOCH3 (1c), respectively. Other substituents at boron including R = H, CH3, C6H5, Cl, and (CH3)2N may be introduced by nucleophilic substitution. In all cases the 1,4-dibora-2,5-cyclohexadiene ligands are η6-bonded. Attempted Friedel-Crafts acetylation of (C5R5)M{CH3B[C2H2]2BCH3} (M = Co, R = H and M = Rh, R = CH3) (5f, 6f) effects ring-member substitution to give the corresponding cationic borabenzene derivatives [(C5R5)M(4-CH3C5H4BCH3)]+ (e.g. 10+).
    Notes: Das 1,4-Dibora-2,5-cyclohexadien FcB[CH=CH]2BFc (1h) (FcH = Fe(C5H5)2) wird durch Natriumamalgam zu diamagnetischem Na2[FcB[C2H2]2BFc] reduziert, welches ein neuartiges 6π-Elektronen-Anion enthält. 17 übergangsmetall-Komplexe (4-8) von Co, Rh, Ni und Pt mit 1,4-Dibora-2,5-cyclohexadien-Liganden L (L = RB[C2H2]2BR) werden beschrieben. Komplexe mit R = Fc und CH3O werden durch Komplexierung von 1h, seinem Dianion oder von CH3OB[CH=CH]2BOCH3 (1c) erhalten. Andere Substituenten am Bor wie R = H, CH3, C6H5, Cl und (CH3)2N lassen sich durch nucleophile Substitution einführen. Die 1,4-Dibora-2,5-cyclohexadien-Liganden sind in allen Fällen η6-gebunden. Der Versuch der Friedel-Crafts-Acetylierung von (C5R5)M{CH3B[C2H2]2BCH3} (M = Co, R = H und M = Rh, R = CH3) (5f, 6f) bewirkt Ringgliedsubstitution und ergibt die entsprechenden kationischen Borabenzol-Derivate [(C5R5)M(4-CH3C5H4BCH3)]+ (z. B. 10+).
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19821150917
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  • 4
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    Electronic Resource
    Derivate des Borabenzols, V. Eisen-Komplexe des 1-Phenyl-und 1-Methylborinat-Ions (1974)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 107 (1974), S. 3780-3785 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Borabenzene Derivatives, V. Iron Complexes of 1-Phenylborinate and 1-Methylborinate IonsBy reaction of bis(borinato)cobalt complexes, Co(C5H5B-R)2 (R=C6H5, CH3), with iron carbonyles bis(borinato)diiron tetracarbonyl complexes, [Fe(CO)2(C5H5B-R)]2 (R=C6H5, CH3), are obtained for which in the solid state a doubly CO-bridged cis-structure is proposed. Pyrolysis of these compounds at 230°C yields the corresponding bis(borinato)iron derivatives, Fe(C5H5B-R)2.
    Notes: Durch Umsetzung von Bis(borinato)kobalt-Komplexen, Co(C5H5B-R)2 (R=C6H5, CH3) mit Eisencarbonylen werden Bis(borinato)dieisentetracarbonyl-Komplexe, [Fe(CO)2(C5H5-B-R)]2 (R=C6H5, CH3), erhalten, für die im festen Zustand eine doppelte CO-verbrückte cis-Struktur vorgeschlagen wird. Pyrolyse dieser Verbindungen bei 230°C ergibt die entsprechenden Bis(borinato)eisen-Derivate, Fe(C5H5B-R)2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19741071208
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  • 5
    Electronic Resource
    Electronic Resource
    Derivate des Borabenzols, VIII: Ein neuer Weg zu Alkalimetallborinaten. Synthesen von Ruthenium-, Osmium-, Rhodium- und Platin-Verbindungen mit Borinat-Liganden (1976)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 109 (1976), S. 2382-2388 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Borabenzene Derivatives, VIII: A New Route to Alkalimetal Borinates. Syntheses of Ruthenium, Osmium, Rhodium, and Platinum Compounds with Borinate LigandsDegradation of bis(borinato)cobalt complexes Co(C5H5B — R)2(R = C6H5, CH3) with alkalimetal cyanides MCN (M = Na, K) yields alkalimetal borinates M[C5H5B — R]. These are versatile synthetic intermediates as demonstrated by the syntheses of Ru(C5H5B — R)2 (R = C6H5, CH3), Os(C5H5B — C6H5)2, Rh(1,5-C8H12)(C5H5B — R), and Pt(CH3)3(C5H5B — C6H5).
    Notes: Der Abbau von Bis(borinato)kobalt-Komplexen Co(C5H5B — R)2 (R = C6H5, CH3) mit Alkalimetallcyaniden MCN (M = Na, K) liefert Alkalimetallborinate M[C5H5B — R]. Diese sind vielseitige Synthesezwischenprodukte, wie mit der Darstellung von Ru (C5H5B — R)2 (R = C6H5,CH3), Os(C5H5B — C6H5)2, Rh(1,5-C8H12)(C5H5B — R) und Pt(CH3)3((C5H5B — C6H5) gezeigt wird.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19761090704
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  • 6
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    Electronic Resource
    Cyclische Analoga von Divinylstannanen, Divinylboranen und pentahapto-Divinylboran-Komplexen (1977)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 110 (1977), S. 760-772 
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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: Cyclic Analogues of Divinylstannanes, Divinylboranes, and pentahapto-Divinylborane ComplexesThe dialkynes X(C ≡ CH)2 with X=(CH3)2C, (CH3)2Si, and (CH2)2 afford the stannacyclodienes X(CH≡CH)2Sn(CH3)2 on hydrostannation with (CH3)2SnH2. These are transformed into the 1-phenylboracyclodienes X(CH=CH)2BC6H5 by treatment with C6H5BCl2. Complexation reactions yield the transition-metal complexes [X(CH=CH)2BC6H5]Fe(CO)3 and (C5H5)Co-[(CH3)2C(CH=CH)2BC6H5] wherein the ligands act as pentahapto-ligands. The structure of tricarbonyl(1,1-dimethyl-4-phenyl-1-sila-4-bora-2,5-cyclohexadiene)iron (6b) is determined by X-ray methods.
    Notes: Die Dialkine X(C ≡ CH)2 mit X — (CH3)2C, (CH3)2Si und (CH2)2 liefern bei der Hydrostannierung mit (CH3)2SnH2 die Stannacyclodiene X(CH=CH)2Sn(CH3)2. Diese werden durch Umsetzung mit C6H5BCl2 in die 1-Phenylboracyclodiene X(CH=CH)2BC6H5 übergeführt. Komplexierungsreaktionen ergeben die Übergangsmetall-Komplexe [X(CH=CH)2BC6H5]Fe(CO)3 und (C5H5)Co[(CH3)2C(CH=CH)2BC6H5], in denen die Boracyclodien-Liganden als pentahapto-Liganden fungieren. Die Struktur von Tricarbonyl(1, 1-dimethyl-4-phenyl-1-sila-4-bora-2,5-cyclo-hexadien)eisen (6b) wird röntgenographisch bestimmt.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19771100240
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  • 7
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    Electronic Resource
    Derivate des Borabenzols, IX. Paramagnetische Chrom-Komplexe des 1-Methyl- und 1-Phenylborinat-Ions (1977)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 110 (1977), S. 816-819 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Borabenzene Derivatives, IX. Paramagnetic Chromium Complexes of 1-Methylborinate and 1-Phenylborinate IonsPotassium borinates, K[C5H5B-R] (R = CH3, C6H5), react with CrCl3 or CrCl2·THF to give paramagnetic bis(borinato)chromium complexes, Cr(C5H5B-R)2 (R = CH3, C6H5). For these a sandwich structure with a 16-electron valence shell is proposed.
    Notes: Durch Umsetzung von Kaliumborinaten, K[C5H5B-R] (R = CH3, C6H5), mit CrCl3 oder CrCl2·THF werden paramagnetische Bis(borinato)chrom-Komplexe, Cr(C5H5B-R)2 (R = CH3, C6H5), erhalten. Für diese wird eine Sandwich-Struktur mit einer 16-Elektronen-Valenzschale vorgeschlagen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19771100303
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  • 8
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    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 
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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: (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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  • 9
    Electronic Resource
    Electronic Resource
    Die Ringerweiterung der Cyclopentadienyl-[5-exo-halogenmethyl-cyclopentadien]-kobalt-Komplexe (1970)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 103 (1970), S. 2016-2023 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Ring Expansion of Cyclopentadienyl[5-exo-(halomethyl)cyclopentadiene]cobalt ComplexesThe 5-exo-halomethyl derivatives Co(C5H5) (C5H5CH2X) (X = Cl, Br, I) of cyclopentadienyl-(cyclopentadiene)cobalt rearrange at 0-60° to form cyclopentadienyl(cyclohexadienyl)-cobalt salts [Co(C5H5) (C6H7)]X almost quantitatively. In solution this novel ring expansion reaction obeys a first-order rate law and the rates show considerable solvent effects. Activation parameters for the rearrangement have been determined. The very high rates, as compared to normal primary alkyl halides, are explained by a concerted mechanism whereby the heterolysis of the carbon-halogen bond is assisted by participation of the cyclopentadiene-cobalt moiety.
    Notes: Cyclopentadienyl-cyclohexadienyl-kobalt-Salze [Co(C5H5) (C6H7)]X (X = Cl, Br, J) werden bei 0-60° fast quantitativ aus den 5-exo-Halogenmethyl-Derivaten Co(C5H5) (C5H5CH2X) des Cyclopentadienyl-cyclopentadien-kobalts erhalten und als Jodid (X = J), Hexafluorophosphat (X — PF6) und Tetraphenylborat (X — B(C6H5)4) charakterisiert. Diese Ringerweiterung gehorcht in Lösung dem Geschwindigkeitsgesetz 1. Ordnung und zeigt erhebliche Solvenseffekte; Aktivierungsparameter wurden bestimmt. Die für primäre Alkylhalogenide außerordentlich hohen Reaktionsgeschwindigkeiten werden durch einen Synchronmechanismus erklärt, bei dem die Heterolyse der Kohlenstoff-Halogen-Bindung unter Beteiligung der Cyclopentadien-kobalt-Gruppierung erfolgt.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19701030703
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  • 10
    Electronic Resource
    Electronic Resource
    Geometrisch isomere Derivate des Tricarbonylcyclopentadien-eisens (1971)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 2772-2780 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Geometrical Isomerism of Tricarbonylcyclopentadieneiron Derivatives5-(Hydroxymethyl)-5-methylcyclopentadiene (6) reacts with Fe2(CO)9 to form tricarbonyl-[5-endo-(hydroxymethyl)-5-exo-methylcyclopentadiene]iron (2b) and tricarbonyl[5-exo-(hydroxymethyl)-5-endo-methylcyclopentadiene]iron (2c) in a 4 : 1 ratio. The isomers can be separated by chromatography. They represent the first example of geometrical isomerism in the tricarbonylcyclopentadieneiron series. Treatment of 5-(ethoxycarbonyl)-5-methyl-cyclopentadiene (5) with Fe2(CO)9 affords tricarbonyl[5-endo-(ethoxycarbonyl)-5-exo-methyl-cyclopentadiene]iron (2a) as the sole isomer. 1H n.m.r. data are used to establish the stereo-chemistry of these and related complexes.
    Notes: 5-Methyl-5-hydroxymethyl-cyclopentadien (6) liefert mit Fe2(CO)9 Tricarbonyl-[5-exo-methyl-5-endo-hydroxymethyl-cyclopentadien-]-eisen (2b) und Tricarbonyl-[5-endo-methyl-5-exo-hydroxymethyl-cyclopentadien] eisen (2c) im Verhältnis 4 : 1. Die beiden Isomeren können chromatographisch getrennt werden. Sie sind das erste Beispiel geometrischer Isomerie in der Tricarbonyl-cyclopentadien-eisen-Reihe. 5-Methyl-5-äthoxycarbonyl-cyclopentadien (5) ergibt mit Fe2(CO)9 Tricarbonyl-[5-exo-methyl-5-endo-äthoxycarbonyl-cyclopentadien]-eisen (2a) als einziges Isomeres. 1H-NMR-Daten legen die Stereochemie der Komplexe und ihrer Derivate fest.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19711040914
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