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  • 1
    Electronic Resource
    Electronic Resource
    Polar functional group analysis of mixtures by silicon-29 nuclear magnetic resonance (1986)
    s.l. : American Chemical Society
    Analytical chemistry 58 (1986), S. 1892-1894 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac00121a064
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Synthesis of new polymers involving deltahedral carborane units (1997)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 198 (1997), S. 193-218 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Aminocarboranes nido-7-NH3+-(7-CB10H12)- and closo-1-NH3+-(CB11H11)- were copolymerized with α,ω-dihalogenoalkanes to high-molecular-weight alternating copolymers. The nido-compound copolymer was crosslinked by means of sandwiching two open cages with CoIII ion yielding bis(monocarbollide)-cobaltate(III) units as the new type knot points. Metallacarboranes, 1,1′-diaminobis(monocarbollide)nickelate(IV) and two bridged bis(dicarbollide)cobaltates(III) (8,8′-μ-imino- and 8,8′-μ-oxyimino-), have provided hemipolymers of molecular weight up to a few thousands in the same type of copolymerization. A new methacrylic-type monomer was prepared by reaction of glycidyl methacrylate with 8,8′-(μ-imino)-(1,2-C2B9H10)-3-CoIII and copolymerized with methyl methacrylate to high-molecular-weight statistical copolymers.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1997.021980115
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Polymerization of p-nitrophenylacetylene with metathesis catalysts. Photoelectrical properties of phenylacetylene/p-nitrophenylacetylene copolymer (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 155-161 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Preparation of substituted acetylene polymers carrying nitro group is reported for the first time. Homopolymers of p-nitrophenylacetylene (NPA) and its copolymer with phenylacetylene (PA) have been prepared by polymerizations induced by WOCl4/3 Me4Sn as a catalyst in benzene and benzene/dioxane as solvents. WOCl4 alone does not polymerize, oligomerize and/or cyclotrimerize NPA. The two-component catalysts WOCl4/2Ph4Sn and MoOCl4/3Me4Sn produce low amounts of oligomers only. The homopolymer of NPA is insoluble, whereas the copolymer containing one NPA unit per 4.38 units of PA is soluble in aromatic solvents and THF. The IR and NMR spectra of the homopolymer and the IR spectrum of the copolymer are reported. The photoconductive properties of the copolymer are also reported and compared with those of poly(PA). Introduction of NO2 groups onto polymer chains was found to increase the quantum efficiency of charge carrier photogeneration but to deteriorate the charge carrier transport properties of the polymer.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 4
    Electronic Resource
    Electronic Resource
    Long-range carbon-proton couplings in strychnine (1994)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 32 (1994), S. 134-137 
    Details
    ISSN: 0749-1581
    Keywords: NMR ; 13C,H long-range couplings ; Strychnine ; Hadamard spectroscopy ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Long-range 13C,H NMR coupling constants were measured in strychnine at 400 MHz by a method that employs selective excitation of individual 13C sites under decoupled conditions followed by polarization transfer to protons. The sensitivity was improved by performing eight simultaneous soft-pulse experiments coded (±) according to a Hadamard matrix and later separated by reference to the same matrix. The antiphase 13C,H splittings were measured by J-doubling performed in the frequency domain.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260320214
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Simplification of 13C NMR spectra by selective excitation of subspectra (1993)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 31 (1993), S. 403-405 
    Details
    ISSN: 0749-1581
    Keywords: Selective excitation ; HOHAHA ; INEPT ; Amikacin disulphate ; Oligomer ; 13C Line assignment ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A new combination of 1D HOHAHA and INEPT pulse sequences is proposed and tested on an antibiotic, amikacin disulphate. The sequence provides 13C NMR spectra of chosen structural subunits and thus facilitates the NMR analysis of oligomers.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260310418
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    31P and 13C NMR spectra of cyclohexylphenylphosphines, tricyclohexylphosphine and triphenylphosphine (1992)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 30 (1992), S. 544-547 
    Details
    ISSN: 0749-1581
    Keywords: Anisochronism ; Chemical shift non-equivalence ; Spin coupling non-equivalence ; Cyclohexylphenylphosphines ; Cyclohexyl derivative ; Phenyl derivative ; Phosphine derivative ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 13C and 31P NMR chemical shifts and coupling constants are reported and assigned for the two cyclohexylphenylphosphines, tricyclohexylphosphine and triphenylphosphine. The 13C NMR spectra of all compounds except dicyclohexylphenylphosphine could be assigned on the basis of APT experiments, substituent effects on the chemical shifts and the values of the 13C—31P spin-spin coupling constants. The 13C NMR spectrum of dicyclohexylphenylphosphine, which shows six non-equivalent (both in chemical shift and in spin-spin coupling) cyclohexyl carbons, was completely assigned on the basis of one-bond and long-range 13C—13C 2D INADEQUATE experiments. The variable-temperature spectra indicate a hindered motion in this compound. The one-bond 13C—13C spin-spin coupling constants of the cyclohexyl carbons vary only slightly with the distance from the substituent. An increase in the 31P chemical shift with an increasing number of cyclohexyl groups parallels the increasing catalytic activity of rhodium complexes containing the studied molecules as ligands.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260300615
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    Paper (German National Licenses)
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