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  • 1980-1984  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Circular dichroism study (1983)
    Springer
    Polymer bulletin 10 (1983), S. 351-356 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary N methacryloyl-S-methyl-L-cysteine (SMC) homopolymer along with a copolymer with methacrylic acid were prepared in the purpose of studying their complexation with Pd(II). The circular dichroism study showed that the binding of SMC residue to a polymeric chain does not change the coordination donor set of Pd complexation, i.e. ¦N, s ¦. The number of side chains per metal ion involved in the complexation depends on the molar fraction of SMC in the case of the copolymer and on the SMC/Pd ratio for both homopolymer anc copolymer. The variation of viscosity when adding Pd(II) suggests the formation of intramolecular loops.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00281947
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    1H and 31P NMR studies of rotational isomerism in phosphorus analogues of aspartic acid, 3-amino-3-phosphonatopropionic and 3-amino-3-(methylphosphinato) propionic acids (1981)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 17 (1981), S. 172-174 
    Details
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: By the use of the 1H—1H and 1H—31P coupling constants in two analogues of aspartic acid i.e. 3-amino-3-phosphonatopropionic and 3-amino-3-(methylphosphinato) propionic acids, it was shown that the six parameter formulation for the evaluation of mole fractions of three staggered ethanic rotamers is not necessarily better than the two parameter formulation in this system. The results allowed the recommendation of the following values for the two vicinal proton parameters i.e. J(HH)g=2.3, J(HH)t=13.9 and for the two vicinal proton-phosphorus parameters i.e. J(HP)g=4.2, J(HP)t=33.0 Hz.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1270170306
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Conformational studies of 3-amino-3-phosphonatopropionic acid. 1H—31P coupling constants (1980)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 14 (1980), S. 431-433 
    Details
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The 1H and 31P NMR spectra of 3-amino-3-phosphonatopropionic acid, a phosphonic derivative of aspartic acid, have been measured and completely analysed for 14 pH values. The vicinal coupling constants, 3J(HH) and 3J(HP), were used to obtain information on the rotational isomerism of the amino acid. The most stable conformer is the one where the phosphonic and β-carboxyl groups are in trans position to each other.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1270140521
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    Paper (German National Licenses)
    Fulltext
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