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  • Articles  (2)
  • Configurational assignment  (1)
  • Iron chelation  (1)
  • Wiley-Blackwell  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Towards New Iron(III) Chelators: Synthesis and Complexing Ability of a Water-Soluble Tripodal Ligand Based on 2,2′-Dihydroxybiphenyl Subunits (1998)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1998 (1998), S. 613-619 
    Details
    ISSN: 1434-1948
    Keywords: Dihydroxybiphenyl ; Iron chelation ; Formation constants ; Protonation constants ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A new water-soluble iron(III) sequestering agent has been designed. The tris-bidentate tripodal ligand consists of three 2,2′-dihydroxybiphenyl subunits connected via amide linkages at their meta (4-) positions to a framework of the “tren” type. The key step of the synthesis involves the coupling of suitably substituted monophenyl moieties in order to obtain the biphenyl precursor. The deprotonation constants of the ligand, and the formation and deprotonation constants of the FeIII complex have been determined from potentiometric and spectrophotometric measurements. The results are compared with those of a previously described homologous ligand in which the chelating subunits are attached to the tren framework via the ortho (3-) position of the biphenyl rather than the 4-position.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 2
    Electronic Resource
    Electronic Resource
    Configurational assignment of β-fluoro-β-phenylamines using 1H and 19F NMR (1988)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 26 (1988), S. 621-624 
    Details
    ISSN: 0749-1581
    Keywords: 1H NMR ; 19F NMR ; Configurational assignment ; β-Fluoro-β-phenylamines ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The 1H and 19F NMR parameters [δH-α, δH-β, δF, 3J(HH) and 3J(FH)] of β-fluoro-β-phenylamines of the two series PhCHFCH2NR1R2 and PhCHFCH(R)-NR1R2 in CDCl3 (amine form) and in CD3OD (protonated amine form) and those of the corresponding β-hydroxy-β-phenylamines were measured. It is shown that for the protonated amines the predominant conformation is that in which the ammonium group is antiperiplanar to the phenyl group, especially for tertiary amines. Assignment of the diastereoisomers of the PhCHFCHRNR1R2 series can be made with the NMR parameters of the protonated amines: high (low) 3J(HH) values, low (high) 3J(FH) values, 19F chemical shifts to high (low) frequency are those for the threo (erythro) isomers.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260260718
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