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  • 1
    Electronic Resource
    Electronic Resource
    Organolanthanid(II)-Chemie: Synthese und Struktur von [Cp2*Sm(μ-OC)2FeCp*]2 (1991)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 1373-1375 
    Details
    ISSN: 0009-2940
    Keywords: Samarium complexes ; Iron complexes ; Lanthanides, organo- ; Heterodimetallic complexes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Organolanthanide(II) Chemistry: Synthesis and Structure of [Cp*Sm(μ-OC)2FeCp*]2The tetranuclear complex [Cp*Sm(μ-OC)2FeCp*]2 (3) has been prepared by reaction of Cp*2Sm(THF)2 with [Cp*Fe(CO)2]2 and structurally characterized by single-crystal X-ray diffraction.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19911240611
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  • 2
    Electronic Resource
    Electronic Resource
    Sterische Cyclopentadienyl-Äquivalente in der Chemie der f-Elemente: Monomere, homoleptische Lanthanid(III)-tris[N,N′-bis(trimethylsilyl)-benzamidinate] (1992)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 125 (1992), S. 2171-2181 
    Details
    ISSN: 0009-2940
    Keywords: Lanthanides ; Benzamidinate ligands ; Steric cyclopentadienyl equivalents ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Steric Cyclopentadienyl Equivalents in f-Element Chemistry: Monomeric, Homoleptic Lanthanide(III) Tris[N,N′-bis(trimethylsilyl)benzamidinates]Anhydrous lanthanide trichlorides react with N-silylated sodium benzamidinates, Na[4-RC6H4C(NSiMe3)2], (1a-d), to give the monomeric, homoleptic lanthanide(III) benzamidinates [4-RC6H4C(NSiMe3)2]3Ln (2-23, R = H, MeO, CF3, Ph). The molecular structure of [4-MeOC6H4C(NSiMe3)2]3Pr (11) has been determined by X-ray diffraction. Absorption and emission measurements reveal that the three benzamidinate ligands produce an unusually large crystal field which is comparable with that of cyclopentadienyl.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19921251003
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  • 3
    Electronic Resource
    Electronic Resource
    Metallorganische Verbindungen der Lanthanoide, 89. Cyclooctatetraenyl-Komplexe der frühen Übergangsmetalle und Lanthanoide, 6. (Cyclooctatetraenyl)[N,N′-bis(trimethylsilyl)benzamidinato]-und -[diphenylbis(trimethylsilylimido)phosphinato]-Komplexe der Seltenen Erden; Röntgenstrukturanalyse von (C8H8)Tm[PhC(NSiMe3)2](THF), (C8H8)Lu[4-MeOC6H4C(NSiMe3)2](THF) und (C8H8)Nd[Ph2P(NSiMe3)2](THF) (1995)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 128 (1995), S. 395-404 
    Details
    ISSN: 0009-2940
    Keywords: Lanthanides, organo-, complexes ; Cyclooctatetraenyl complexes ; Benzamidinate ligands ; Diimidophosphinate ligands ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Organometallic Compounds of the Lanthanoids, 89. - Cyclooctatetraenyl Complexes of the Early Transition Metals and Lanthanoids, 6. - (Cyclooctatetraenyl)[N,N′-bis(trimethylsilyl)benzamidinato]- and -[diphenylbis(trimethylsilylimido)-phosphinato] Complexes of the Rare Earths; X-Ray Structural Analyses of (C8H8)Tm[PhC(NSiMe3)2](THF), (C8H8)Lu[4-MeOC6H4C(NSiMe3)2](THF), and (C8H8)Nd[Ph2P(NSiMe3)2](THF)[(C8H8)Ln(μ-Cl)(THF)2]2 or [(C8H8)Ln(μ-O3SCF3)(THF)2]2 (Ln = Y, Ce, Pr, Nd, Sm, Tm, Lu) react with Na[4-RC6H4C(NSiMe3)2] (R = H, OMe, CF3) or Li[PhC(NSiMe3)2] to give the monomeric (cyclooctatetraenyl)lanthanide benzamidinates (C8H8)Ln[4-RC6H4C(NSiMe3)2](THF) [R = H, Ln = Y (1), Ce (4), Pr (6), Nd (8), Sm (10), Tm (12), Lu (15); R = OMe, Ln = Y (2), Ce (5), Pr (7), Nd (9), Sm (11), Tm (13), Lu (16); R = CF3, Ln = Y (3), Tm (14), Lu (17)]. The reaction of [(C8H8)Ln(μ-Cl)(THF)2]2 (Ln = Ce, Pr, Nd, Sm) with Li[Ph2P(NSiMe3)2] in THF leads directly to the monomeric compounds (C8H8)Ln[Ph2P(NSiMe3)2](THF) [Ln = Ce (18), Pr (19), Nd (20), Sm (21)] in good yields. The 1H-, 13C-, 31P- and 29Si-NMR and mass spectra of the new compounds as well as the molecular structures of 12, 16, and 20 are discussed. The Raman spectra of the complexes 1-3, 12, and 14-17 have been studied in detail.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19951280411
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  • 4
    Electronic Resource
    Electronic Resource
    Anorganische Ringsysteme mit Ferrocenyl-Substituenten (1989)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 122 (1989), S. 1247-1254 
    Details
    ISSN: 0009-2940
    Keywords: Ferrocenyl-substituted heterocycles ; Heterocycles with As, N, P, S ; Metallaheterocycles ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Inorganic Ring System Containing Ferrocenyl SubstituentsThree-, four-, five-, and eight-membered heterocycles are synthesized starting from FcPCl2 (1), FcPH2 (2), FcAsCl2 (3) and Fe(C5H4AsCl2)2 (4) (Fc = Ferrocenyl). Treatment of 1 with 2 in the presence of DBU yields (FcP)n, which reacts with (Ph3P)2Pt(C2H4) to give (7). The corresponding As2Pt ring system 9 is available in high yield via (FcAs)3 (8). The reduction of 1 with LiAlH4 yields (FcP)4 (10). A five-membered arsenic sulfur heterocycle, Fc2As2S3 (12), is formed in the reaction of FcAs=P(2,4,6-tBu3C6H2) (11) with sulfur. FcAsCl2 (3) reacts with Me3SiNSNSiMe3 to give FcAs(NSN)2AsFc (13), which contains an eight-membered As2S2N4 ring. Its complexation with (norbornadiene)M(CO)4 leads to the tetracarbonyl complexes [FcAs(NSN)2AsFc]M(CO)4 (14, 15; M = Cr, Mo). An arsenic-bridged ferrocenophane 16 can be isolated from the reaction of Fe(C5H4Li)2 x TMEDA with AsCl3. The reaction of 4 with Me3SiNSNSiMe3 also produces a condensed ferrocenophane derivative, (C5H4)2FeAs2N6S4 (17). The molecular structures of 13 and 17 have been determined by X-ray diffraction.
    Notes: Ausgehend von FcPCl2 (1), FcPH2 (2), FcAsCl2 (3) und Fe(C5H4AsCl2)2 (4) werden drei-, vier-, fünf- und achtgliedrige Heterocyclen mit Ferrocenyl-Substitutenten synthetisiert (Fc = Ferrocenyl). Durch Umsetzung von 1 mit 2 in Gegenwart von DBU entsteht (FcP)n, das mit (Ph3P)2Pt(C2H4) zu (7) reagiert. Der analoge As2Pt-Ring 9 ist über (FcAs)3 (8) in guter Ausbeute zugänglich. Die Reduktion von 1 mit LiAlH4 liefert (FcP)4 (10). Ein fünfgliedriger Arsen-Schwefel-Heterocyclus, Fc2As2S3 (12), entsteht durch Umsetzung von FcAs=P(2,4,6-tBu3C6H2) (11) mit Schwefel. FcAsCl2 (3) reagiert mit Me3SiNSNSiMe3 zu FcAs(NSN)2AsFc (13), das einen achtgliedrigen As2S2N4-Ring enthält. Dessen Komplexierung mit (Norbornadien)M(CO)4 führt zu den Tetracarbonyl-Komplexen [FcAs(NSN)2AsFc]M(CO)4 (14, 15; M = Cr, Mo). Ein Arsenüberbrücktes Ferrocenophan 16 kann bei der Reaktion von Fe(C5H4Li)2 × TMEDA mit AsCl3 isoliert werden. Auch die Umsetzung von 4 mit Me3SiNSNSiMe3 liefert ein kondensiertes Ferrocenophan-Derivat der Zusammensetzung (C5H4)2FeAs2N6S4 (17). Die Molekülstrukturen von 13 und 17 wurden röntgenographisch bestimmt.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19891220706
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  • 5
    Electronic Resource
    Electronic Resource
    Lösliche Lanthanid-alkoxide mit niedrigen Koordinationszahlen am Metall-Atom (1991)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 1163-1165 
    Details
    ISSN: 0009-2940
    Keywords: Lanthanide alkoxides ; Tritox ligand ; Neodymium ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Soluble Lanthanide Alkoxides with Low Coordination Numbers at the Metal AtomNd[N(SiMe3)2]3(thf)2 (1) reacts with tBu3COH (2) to give the monomeric lanthanide alkoxide (tritox)3Nd(thf) (3). The chloro-bridged dimer [(tritox)2Nd(μ-Cl)thf]2 (6) is obtained by treatment of NdCl3(thf)2 (4) with LiOCtBu3 (5). The structure of 6 has been determined by X-ray crystallography.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19911240530
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  • 6
    Electronic Resource
    Electronic Resource
    Stabilisierung von Uran(IV)-Alkylen durch raumerfüllende Chelatliganden: Molekülstruktur von [PhC(NSiMe3)2]3UMe (1992)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 125 (1992), S. 1313-1318 
    Details
    ISSN: 0009-2940
    Keywords: Actinides, organo- ; Uranium complexes ; σ-Alkyl complexes ; Chelating ligands ; Benzamidinate ligands ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Stabilization of Uranium(IV) Alkyls by Bulky Chelating Ligands: Molecular Structure of [PhC(NSiMe3)2]3UMeChelate ligand-stabilized uranium σ-methyl complexes are obtained in good yields by treatment of [RC6H4C-(NSiMe3)2]3UCl (1) with methyllithium. The molecular structure of [PhC(NSiMe3)2]3UMe (3a) has been determined by X-ray crystallography. A long uranium - carbon bond [249.8(5) pm] indicates steric crowding in the molecule. Analogously the dimethyluranium complex [(CF3)3C6H2C(NSiMe3)2]2UMe2 (4b) is prepared from [(CF3)3C6H2C(NSiMe3)2]2UCl2 and two equivalents of methyllithium. Reaction of 1 with NaBH4 yields the tetrahydroborates [RC6H4C(NSiMe3)2]3UBH4 (5). The strongly temperature-dependent 1H-NMR spectra of the complexes 1 and 3 have been studied in detail.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19921250603
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  • 7
    Electronic Resource
    Electronic Resource
    Beiträge zur Chemie der Alkylverbindungen von Übergangsmetallen. 64. Darstellung und Kristallstruktur von Bis[N,N′-bis(trimethylsilyl)benzamidinato]dimethyltitan (1996)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 713-716 
    Details
    ISSN: 0044-2313
    Keywords: Tetramethyltitanium ; transition metal alkyls ; benzamidinate complexes ; X-ray structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Transition Metal Alkyl Compounds. 64 [1] Preparation and Crystal Structure of Bis[N,N′ -bis(trimethylsilyl)-benzamidinato]dimethyltitaniumTetramethyltitanium reacts with excess N,N′-bis(trimethylsilyl)-benzamidine (1) to give bis[N,N′-bis(trimethylsilyl)benzamidinato]dimethyl-titanium (2) via protolysis. This compound was isolated and characterized by X-ray crystal structure analysis. In the crystal, 2 adopts an octahedral coordination with the methyl groups in cis-positions. The monomethyl complexes [PhC(NSiMe3)2]2M(Me)Cl (3: M = Ti, 4: M = Zr) have been prepared by treatment of the dichloro precursors with one equivalent of methyllithium.
    Notes: Tetramethyltitan wird von einem Überschuß an N,N′-Bis(trimethylsilyl)benzamidin (1) zum Bis[N,N′-bis(trimethylsilyl)benzamidinato]dimethyltitan (2) protolysiert. Diese Verbindung konnte isoliert und ihre Kristallstruktur ermittelt werden. Danach liegt 2 im Kristall in oktaedrischer Koordination vor, wobei die beiden Methylgruppen in cis-Position zueinander stehen. Die Monomethylkomplexe [PhC(NSiMe3)2]2M(Me)Cl (3: M = Ti, 4: M = Zr) wurden durch Umsetzung der Dichlorovorstufen mit einem Äquivalent Methyllithium dargestellt.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19966220424
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