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  • Inorganic Chemistry  (3)
  • 1,1′-Diazaferrocene coordination  (1)
  • Azaferrocene, tetramethyl-  (1)
  • Organic Chemistry  (1)
  • 1985-1989  (4)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Synthese und Reaktivität von Dienylmetall-Verbindungen, XXIX. Pretonierung von C5H5FeC6H7 zu Cyclohexadien und Folgereaktionen (1988)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 121 (1988), S. 111-115 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Reactivity of Dienylmetal Compounds, XXIX1). - Protonation of C5H5FeC6H7 to Cyclohexadiene and Consequent ReactionsC5H5FeC6H7 (1) reacts with HBF4-Et2O to give the tetrafluoroborato complex C5H5Fe(C6H8)FBF3 (2). The BF4 coordination in solution is demonstrated by 19F-DNMR experiments. The ligands BF4- and C6H8 in 2 are substituted stepwise by the dimethyl chalcogen compounds EMe2 (E = S, Se, Te; Me = CH3). The elimination of undecomposed C6H8 demonstrates the ability of this reaction for the synthesis of 1,3-cyclohexadienes. The isolable cation [C5H5Fe(SMe2)3]+ (5a) serves as a useful tool for the preparation of carbonyl free (cyclopentadienyl)iron compounds.
    Notes: C5H5FeC6H7 (1) wird durch HBF4-Et2O in den Tetrafluoroborato-Komplex C5H5Fe(C6H8)FBF3 (2) übergeführt, in dem die Koordination des BF4-Liganden in Lösung durch 19F-DNMR-Messungen nachgewiesen wird. In 2 lassen sich die Liganden BF4- und C6H8 schrittweise durch die Dimethylchalkogenide EMe2 (E = S, Se, Te; Me = CH3) austauschen. Die Eliminierung von unzersetztem C6H8 zeigt die prinzipielle Eignung dieser Reaktion zur Darstellung von 1,3-Cyclohexadienen. Das isolierbare Kation [C5H5Fe(SMe2)3]+ (5a) dient als Ausgangsprodukt zur Synthese carbonylfreier (Cyclopentadienyl)eisen-Komplexe.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19881210117
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  • 2
    Electronic Resource
    Electronic Resource
    Heterocyclen als Liganden, VI: Die verbrückende Koordination eines 1,1′-Diazaferrocens in einem zweikernigen Silberkomplex  -  eine ungewöhnliche Struktur (1989)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 122 (1989), S. 2275-2277 
    Details
    ISSN: 0009-2940
    Keywords: 1,1′-Diazaferrocene coordination ; Silver complex ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Heterocycles as Ligands, VI1. - The Bridging Coordination of a 1,1′-Diazaferrocene in a Dinuclear Silver Complex - an Uncommon Structure[Ag2(μ-pyr2*Fe)2](BF4)2 · 2 MeOH (4, pyr* = C4Me4N) is obtained by reaction of pyr2*Fe · 2 Hpyr* (3) with AgBF4 in MeOH. The X-ray structure of 4 shows the bridging coordination mode of the diazaferrocene ligands with a nearly linear geometry at the silver atoms.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19891221212
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  • 3
    Electronic Resource
    Electronic Resource
    Heterocyclen als Liganden, V: Synthese und Charakterisierung von 2,3,4,5-Tetramethyl-1-azaferrocen (1989)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 122 (1989), S. 1891-1896 
    Details
    ISSN: 0009-2940
    Keywords: Azaferrocene, tetramethyl- ; Trihydropyrrolylboranate coordination ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Heterocycles as Ligands, V.  -  Synthesis and Characterization of 2,3,4,5-Tetramethyl-l-azaferroceneC5H5Fe(C4Me4N) (7) is obtained by deprotonation of the pyrrole complex [C5H5Fe(C4Me4NH)]BF4 (6). The nitrogen basicity of 7 resembles closely that of alkylpyridines (pKa = 7.2). Complex 7 reacts with Lewis acids to give the adducts [C5H5Fe(C4Me4NR)]+ [8, 9; R = CH3, C(O)CH3] and C5H5Fe(C4Me4NE) [10, 11; E = BH3, Fe(CO)4]. The X-ray structure of the pyrrolyltrihydroborate complex 10 is isosteric with pentamethylferrocene and has a metallocene structure with an eclipsed ligand conformation.
    Notes: Die Synthese von C5H5Fe(C4Me4N) (7) gelingt durch Deprotonierung des Pyrrol-Komplexes [C5H5Fe(C4Me4NH)]BF4 (6). Komplex 7 entspricht in seiner Stickstoff-Basizität den Alkylpyridinen (pKs = 7.2). Durch Umsetzung mit Lewis-Säuren werden die Addukte [C5H5Fe(C4Me4NR)]+ [8, 9; R = CH3, C(O)CH3] und C5H5Fe(C4Me4NE) [10, 11; E = BH3, Fe(CO)4] erhalten. Nach der Kristallstrukturanalyse ist der zu Pentamethylferrocen isostere Pyrrolyltrihydroborat-Komplex 10 ein Metallocen mit ekliptisch angeordneten Ringliganden.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19891221010
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  • 4
    Electronic Resource
    Electronic Resource
    Synthese von N-tert-Butyl-4-(tert-butylimino)-2-penten-2-amin (1987)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1987 (1987), S. 727-728 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis of N-tert-Butyl-4-(tert-butylimino)-2-penten-2-amineN-tert-Butyl-4-(tert-butylimino)-2-penten-2-amine (5) has been prepared by stepwise exchange of oxygen in acetylacetone (1) by tert-butylamino groups followed by deprotonation. For the first step 1→2 either silylated 1 or 1 and an excess of Et2O—BF3 is required. The title compound 5 forms a single isomer in solution which is supposedly of the “U” type.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198719870818
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