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  • Books
  • Articles  (12)
  • Analytical Chemistry and Spectroscopy  (12)
  • 1985-1989  (12)
  • 1
    Electronic Resource
    Electronic Resource
    Use of two-dimensional NMR to assign the protons and carbons in cephalotaxine (1988)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 26 (1988), S. 1036-1037 
    Details
    ISSN: 0749-1581
    Keywords: Cephalotaxine ; 2D NMR ; 13C ; 1H assignments ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Prton and 13C chemical shift assignments have been made for naturally occurring cephalotaxine. The assignments of two carbons are reversed from those in the liteature. The chemical shifts and configurations of the pyrrolidine protons, aminomethylene protons and benzylic protons in cephalotaxine have been determined by the application of several 2D NMR techniques.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260261118
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  • 2
    Electronic Resource
    Electronic Resource
    A set of alkyl substituent constants for correlating chemical shifts of a variety of nuclei (1986)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 24 (1986), S. 816-820 
    Details
    ISSN: 0749-1581
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A set of substituent constants for alkyl groups has been calculated and shown to be useful in the correlations of chemical shifts of atoms that have a directly bonded alkyl group(s). The correlation equation used is δ(X) = mσn + b, where δ(X) is the chemical shift of atom.X, δ. is the alkyl substituent constant and m and b are constants for a given series of compounds. Forty-two series of compounds, consisting of thirteen different X nuclei (13C, 14N, 15N, 17O, 19F, 29Si, 31P, 35CI, 75As, 77Se, 113Cd, 125Te, 199Hg) have been correlated.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260240916
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  • 3
    Electronic Resource
    Electronic Resource
    Raman spectral study of the Mg(ClO4)2—NaNCS—H2O system at ambient and elevated temperatures (1989)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 20 (1989), S. 523-528 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Raman spectra of Mg(ClO4)2—NaNCS—H2O mixtures were analysed as a function of the concentration ratio of the components at ambient and elevated temperatures. The strong perturbation of the thiocyanate spectrum observed in the regions of the ν1 and ν3 vibrations is interpreted in terms of complex formation. Band intensity measurements of resolved bands gave evidence for two complex species: [MgNCS]+ and [Mg(NCS)2], the former being discernible over the whole concentration range studied. The variations in the spectrum of the Td perchlorate ion at very low water-to-salt molar ratios are explained as indicating a coordination of ClO4- unit and lowering of the symmetry of C2ν.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250200808
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  • 4
    Electronic Resource
    Electronic Resource
    Dr Harold J. Bernstein 1914-1984 (1985)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 16 (1985), S. 70-70 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250160113
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  • 5
    Electronic Resource
    Electronic Resource
    Hyper Rayleigh and hyper Raman scattering from ammonium chloride and ammonium bromide (1985)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 16 (1985), S. 398-406 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The hyper Rayleigh and hyper Raman (0-1600 cm-1 wavenumber shift) spectra of oriented single crystals of ammonium chloride and ammonium bromide are reported. It is demonstrated that hyper Rayleigh scattering is a very sensitive measure of the presence of a centre of symmetry within a crystal structure and this property is used to investigate the residual ordering within an ammonium chloride crystal at 55 K above the order-disorder phase transition. The hyper Raman wavenumber shifts associated with the transverse (TO) and longitudinal (LO) components of the optic mode, the librational mode which is infrared and Raman inactive, and the H-N-H internal mode were observed for both crystals. A basis for the interpretation of the relative hyper Raman intensities of the LO and TO modes is provided by an extension of the Poulet treatment of the relative intensities in the Raman spectrum.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250160608
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  • 6
    Electronic Resource
    Electronic Resource
    Two-dimensional NMR study of ganwuweizic acid (1989)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 27 (1989), S. 998-1001 
    Details
    ISSN: 0749-1581
    Keywords: Two-dimensional ; NMR ; Chemical shift ; Configuration ; Conformation ; Ganwuweizic acid ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Several two-dimensional NMR techniques were applied to assign completely the 1H and 13C chemical shifts and to study the configuration and conformation of a new triterpenoid, 3-keto-9,10,19-cyclopropyllanost-24-en-26-oic acid (ganwuweizic acid). Some 13C NMR signals previously reported for the triterpenoid skeleton were corrected.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260271018
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  • 7
    Electronic Resource
    Electronic Resource
    Lattice vibrations of phthalic anhydride (1988)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 19 (1988), S. 9-11 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Low-frequency polarized Raman spectra of an oriented single-crystal sample of phthalic anhydride have been recorded and an assignment of observed frequencies has been made on the basis of lattice normal mode calculation performed in the ‘rigid body’ approximation.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250190103
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  • 8
    Electronic Resource
    Electronic Resource
    Line widths in the pure rotational Raman spectra of nitrogen, oxygen and hydrogen broadened by foreign gases (1988)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 19 (1988), S. 457-461 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Broadening coefficients, σp, have been determined for the pure rotational Raman lines of nitrogen and oxygen, perturbed by hydrogen, helium and methane, and of hydrogen broadened by helium, argon, nitrogen and carbon monoxide, over the pressure range 2-100 bar with a host gas partial pressure of 1 bar. The results are summarized below:The broadening coefficients are discussed in relation to the dipole, quadrupole and octopole moments and the polarizabilities of the perturbing species.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250190705
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  • 9
    Electronic Resource
    Electronic Resource
    The pure rotation Raman spectrum of 17O18O (1986)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 17 (1986), S. 431-432 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The pure rotation Raman spectrum of 17O18O has been recorded photographically using laser excitation and a spectrograph with a reciprocal linear dispersion of 1.4 cm-1 mm-1 at 488.0 nm. The following B0, D0 and r0 values were obtained; B0=1.31546±0.00002 cm-1, 106D0=3.50±0.05 cm-1 and r0=121.072±0.002 pm.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250170509
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  • 10
    Electronic Resource
    Electronic Resource
    Molecular interactions between electrophiles and nucleic acids. IIFor Part I, see Page 77, this issue. - Raman and infrared spectra of adenine, adenine hydrochloride and the corresponding 1-methyl derivatives in relation to tautomerism and mutagenic phenomena of bases of nucleic acids (1987)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 18 (1987), S. 83-92 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The Raman and IR spectra of adenine (AH3) and of its derivatives adenine hydrochloride (AH4Cl), 1-methyladenine (1MeAH2) and 1-methyladenine hydrochloride (1MeAH3Cl) are discussed in relation to the mutagenic and carcinogenic activities that they display.The spectra give evidence for a shift of tautomeric stability from the aminic form, which is favoured in AH3, toward the iminic, or iminic-derived form, in the derivatives AH4Cl, 1MeAH2 and 1MeAH3Cl.The different biological activities of this series of compounds, in particular the mutagenic and carcinogenic effects, can be interpreted in terms of different reactivites associated with the π electronic systems, and of a hydrogen-bond coupling different from the canonical Watson-Crick type.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250180203
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