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  • 1
    Electronic Resource
    Electronic Resource
    Conformational analysis: IX-a 300 MHz study of 4-vinylbutyrolactoneFor Parts VII and VIII, see Ref. 1. (1974)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 6 (1974), S. 301-302 
    Details
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The 300 MHz 1H NMR spectrum of 4-vinylbutyrolactone has been recorded and analysed. The results showed that the compound is a mixture of two rapidly interconverting envelope forms in which (C-3) is the flap atom. The vinyl group favours the pseudo-equatorial orientation by 1·9 ± 0.3 kJ mol-1, as shown by the dependence of the vicinal coupling constants on temperature.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1270060514
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  • 2
    Electronic Resource
    Electronic Resource
    Nitrogen inversion in 3,6-dihydro-1,2-oxazines (1980)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 14 (1980), S. 324-326 
    Details
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The nitrogen inversion barriers of nine 3,6-dihydro-1,2-oxazines are discussed. Polar solvents were found to increase the nitrogen inversion barriers which, in turn, decrease with increasing size of the N-substituent.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1270140424
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  • 3
    Electronic Resource
    Electronic Resource
    Reorientational dynamics of liquid CH3CCl3 by Raman spectroscopy (1981)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 11 (1981), S. 496-501 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Spontaneous Raman spectra of the 2940 cm-1 signal of liquid 1,1,1-trichloroethane (TCE) were studied in order to obtain information concerning the molecular reorientation process. The reorientational correlation time was measured as a function of temperature between 255 and 298K giving an activation energy of 2.6 cal mol-1 for the tumbling motion of neat liquid TCE. Experimental results were compared with those from extended J-diffusion model, microviscosity theory and previous work. It was found that the TCE molecules underwent small-step rotational diffusion. The large variation of the reorientational correlation functions and rotational correlation times of TCE in dilute solutions of CCl4, CDCl3 and CD3CN suggested that the dipole moment contribution is an important factor in molecular reorientation in solutions as suggested by Larkin.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250110614
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  • 4
    Electronic Resource
    Electronic Resource
    Raman spectrum and vibrational assignments for tricyclo(3.3.0.02,6) octane (1976)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 5 (1976), S. 57-62 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The vibrational assignments for the liquid phase of tricyclo(3.3.0.02,6)octane (TCO) are herein presented. Special emphasis was placed upon identification of polarized lines with respect to Fermiresonance interactions. The rigidity of the molecule is discussed.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250050107
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  • 5
    Electronic Resource
    Electronic Resource
    A Raman spectroscopic study of a vibration-vibration near resonant energy transfer mechanism in liquid toluene-d5 (1976)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 5 (1976), S. 93-99 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The polarized signals from the methyl group stretching coordinate of toluene-d5 have been analyzed by the time correlation technique. Based upon the polarized signal correlation function of the 2922 cm-1 signal and the presence of Fermi resonance in the molecule, mechanistic interpretations of a vibrational internal conversion process are offered.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250050111
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  • 6
    Electronic Resource
    Electronic Resource
    Conformational equilibria in the solid state: Conformational equilibrium in bicyclo[3.3.1]nonane derivatives studied by solid-state spectroscopy (1992)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 30 (1992), S. 1070-1074 
    Details
    ISSN: 0749-1581
    Keywords: Bicyclo[3.3.1]nonan-9-one derivatives ; CP/MAS NMR spectra ; Chair/chair-chair/boat equilibrium ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Several derivatives of bicyclo [3.3.1]nonan-9-one were examined by CP/MAS NMR spectroscopy in the solid state. Contrary to an earlier report based on X-ray crystallography, no conclusive evidence was found for the existence of a chair/chair-chair/boat equilibrium in the temperature range -100 to +20 °C. It is concluded that if such solidstate equilibria exist they have free energies of activation for ring inversion in the solid of less than 31 kJ mol-1.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260301108
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  • 7
    Electronic Resource
    Electronic Resource
    13C CP/MAS NMR study of a phenyl group rotation in the solid state using T1ρ, lineshape and 2D EXSY measurements (1994)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 32 (1994), S. 118-121 
    Details
    ISSN: 0749-1581
    Keywords: 13C CP/MAS NMR ; Solid-state phenyl group rotation ; T1ρ ; Lineshape 2D EXSY ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A combination of solid-state 13C CP/MAS NMR methods was used to study the rates of rotation of the phenyl group in 3,5-dimethyl-1-phenylhex-1-yn-3-ol. The methods used were T1ρ measurements, lineshape analysis and 2D exchange spectroscopy over the temperature range 219-284 K. The rates of rotation obtained from the lineshape and 2D EXSY methods give an energy of activation of 58.6 ± 3.0 kJ mol-1. In good agreement with this, the T1ρ measurements give an activation energy for the rotation of 58.7 ± 3.6 kJ mol-1. The two sets of data are shown to be compatible, within experimental error, with a calculated value for the dipolar carbon-hydrogen interaction (B) from an assumed molecular geometry.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260320211
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  • 8
    Electronic Resource
    Electronic Resource
    NMR visibility of 35Cl- in human erythrocytes (1995)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 33 (1995), S. 66-69 
    Details
    ISSN: 0749-1581
    Keywords: NMR ; 35C1 NMR ; Erythrocytes ; Visibility of Quadrupolar Nuclei ; Relaxation ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Contrary to previous reports, Cl- is visible by 35Cl NMR inside human erythrocytes. In spectra run at 49.01 MHz the intracellular chloride has a linewidth at half-height of ca 700 Hz and shows double Lorentzian character. Mn2+ was used to relax the extracellular 35Cl- to allow the intracellular 35Cl- to be seen. The experimental protocol described should allow NMR observation of anion transport rates in human erythrocytes.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260330111
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  • 9
    Electronic Resource
    Electronic Resource
    Residual dipolar splittings in, 13C MAS NMR arising from interactions with chlorine nuclei (1993)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 31 (1993), S. 963-965 
    Details
    ISSN: 0749-1581
    Keywords: Solid-state NMR ; Carbon-13 ; Magic-angle spinning ; Residual dipolar splittings ; Second-order quadrupolar effects ; Carbon-chlorine interactions ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Residual dipolar splittings in 13C cross-polarization magic-angle spinning spectra arising from coupling to chlorine nuclei are reported for the three chloroacetanilide isomers, using several spectrometers. At medium to high magnetic field doublets are seen for C—Cl carbon resonances. Perturbation theory explains the appearance of the spectra qualitatively but is inadequate quantitatively.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260311016
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  • 10
    Electronic Resource
    Electronic Resource
    NMR study of the solid-state rearrangement of 3-amino-1- and -2-(chloroacetyl)pyrazole to 3-(chloroacetamido)pyrazole (1994)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 32 (1994), S. 255-257 
    Details
    ISSN: 0749-1581
    Keywords: NMR ; 13C CP/MAS ; 1H Solid-state rearrangement ; 3-Amino-1-and -2-(chloroacetyl)pyrazole ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reaction of 3-aminopyrazole (1) with chloroacetyl chloride gives a mixture of 3-amino-1- and -2-(chloroacetyl)pyrazole (2 and 3), both of which rearrange in the solid-state to 3-(chloroacetamido)pyrazole (4) over a period of a few days. The course of the rearrangements was monitored directly by CP/MAS NMR and indirectly by 1H NMR spectroscopy; the results suggest that the mechanism involves 3 → 2 → 4.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260320412
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