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  • Analytical Chemistry and Spectroscopy  (12,712)
  • FLUID MECHANICS AND HEAT TRANSFER  (5,762)
  • 1990-1994  (10,377)
  • 1985-1989  (8,097)
Collection
Keywords
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    1,2-Carbon shifts in [C4H8O]+· and [C5H10O]+· ions (1985)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 20 (1985), S. 402-405 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Present results demonstrate that α,β-shifts of the functional group carbon strongly dominate β,α-methyl shifts in [C4H8O]+· and [C5H10O]+· ions, paralleling observations of others on methyl isobutyrate ions.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210200604
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  • 2
    Electronic Resource
    Electronic Resource
    1,2-Dibromoethane as a positive chemical ionization reagent: Application to geometrical isomersRRL(H) Communication No. 2143 (1988)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 23 (1988), S. 620-621 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210230813
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  • 3
    Electronic Resource
    Electronic Resource
    1,2-Versus 1,4-reduction of α,β-unsaturated carbonyl compounds in the gas phase (1993)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 28 (1993), S. 1658-1664 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The regioselectivity involved in the gas-phase hydride reduction of α,β-unsaturated carbonyl compounds by pentacoordinate silicon hydride ions is investigated. The kinetics and product distributions of the reactions of acrolein, methyl vinyl ketone and cyclohex-2-enone with monoalkoxysiliconate ions of the general composition RSiH3(OR′)- were examined with the flowing afterglow-triple quadrupole technique. All three substrates react by hydride transfer and by formation of a siliconate adduct in which hydride reduction of the organic reactant has occurred. The structures of these adducts and the hydride transfer products were identified by various tandem mass spectrometric protocols, including analysis of competitive collision-induced dissociation (CID) reactions and comparisons of CID spectra obtained from reference ions with known structures. 1,4-Reduction forming an enolate ion product is found to be the dominant or exclusive process with all three substrates, i.e. acrolein (70 ± 5%), methyl vinyl ketone (72 ± 5%) and cyclohex-2-enone (100%). Comparisons are made between these gas-phase results and the regioselectivity reported for analogous condensed-phase reactions. The observed behavior is discussed in terms of the reaction thermochemistry.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210281243
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  • 4
    Electronic Resource
    Electronic Resource
    1,3-dinitroso-, 1-nitroso-3-nitro-, and 1,3-dinitro-1,3-diazacycloalkanes. A multinuclear NMR studySee Ref. 1. (1988)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 26 (1988), S. 95-103 
    Details
    ISSN: 0749-1581
    Keywords: 1,3-Dinitroso-1,3-diazacycloalkanes ; 1-Nitroso-3-nitro-1,3-diazacycloalkanes ; 1,3-Dinitro-1,3-diazacycloalkanes ; Multinuclea gHNMR ; Rotamer populations ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A series of five-, six-, and seven-membered 1,3-dinitroso-, 1-nitroso-3-nitro-, and 1,3-dinitro-1,3-diazacycloalkanes were investigated by 1H, 13C, and 15N NMR spectroscopy. Hindered rotation of the nitrosamine group leads to the existence of rotational isomers. The relative populations of rotamer forms are determined by steric and electrostatic interactions between nitroso groups and the remainder of the molecule, and by the size of the ring.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260260202
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  • 5
    Electronic Resource
    Electronic Resource
    1,5-Pentanediol as a matrix for nagative-ion fast atom bombardment mass spectrometry (1991)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 26 (1991), S. 1123-1124 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210261218
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  • 6
    Electronic Resource
    Electronic Resource
    103Rh NMR studies of cyclometallated Rh(III) Schiff's base complexes (1987)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 25 (1987), S. 158-160 
    Details
    ISSN: 0749-1581
    Keywords: 103Rh NMR ; 31PNMR ; 1H NMR ; Cyclometallated Rh(III) Schiff base complexes ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 103Rh, 31P and 1H NMR data are reported for the cyclometallated Rh(III) complexes of the type RhH(Y)()L2, where Y can be either an anionic or neutral ligand, is a carbon - nitrogen bidentate ligand arising from cyclometallation at the imine carbon of the Schiff's bases derived from 2-amino-3-methylpyridine and substituted benzaldehydes and L can be either PPh3, AsPh3 or SbPh3. There is only a modest dependent of δ (103Rh) on the nature of the benzaldehyde, a substantial change as a function of L and the most significant sensitivity, 〉800 ppm, as a function of Y. It is suggested that 103Rh NMR spectroscopy may be useful in the study of linkage isomers of SCN-.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260250214
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  • 7
    Electronic Resource
    Electronic Resource
    10th Anniversary Meeting of the finnish Mass Spectrometry Group (1991)
    New York, NY : Wiley-Blackwell
    Rapid Communications in Mass Spectrometry 5 (1991), S. i 
    Details
    ISSN: 0951-4198
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/rcm.1290050711
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  • 8
    Electronic Resource
    Electronic Resource
    113Cd NMR spectra of human serum transferrin (1993)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 31 (1993), S. S110 
    Details
    ISSN: 0749-1581
    Keywords: NMR ; 113Cd NMR ; Transferrin ; Hydrogencarbonate ; N-lobe ; C-lobe ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The binding of Cd2+ to human serum transferrin (80 kDa) was studied by 113Cd NMR spectroscopy. At pH 7 in the presence of hydrogen-carbonate as synergistic anion, two resonances of similar intensity at 38.1 and 43.6 ppm were observed, consistent with Cd2+ binding to oxygen ligands and one nitrogen ligand in the specific metal-binding clefts of the N- and C-lobes of the protein.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260311321
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  • 9
    Electronic Resource
    Electronic Resource
    119Sn and 1H NMR of the novel complexes [IrH(SnCl3)5]3- and [RhH(SnCl3)5]3- (1985)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 23 (1985), S. 202-206 
    Details
    ISSN: 0749-1581
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: New anionic complexes, [IrH(SnCl3)5]3- and [RhH(SnCl3)5]3-, in which the hydride ligands are stabilized only by SnCl3- ligands, have been characterized by 119Sn and 1H NMR spectroscopy. These pentakis SnCl3- complexes are contained in catalyst solutions for the liquid-phase dehydrogenation of propan-2-ol yielding acetone and dihydrogen.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260230315
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  • 10
    Electronic Resource
    Electronic Resource
    119Sn NMR characterization of the series of complex [Pt(SnClxBry)5]3- Anions (x + y = 3) extracted into chloroform using a liquid anion exchanger (1992)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 30 (1992), S. 158-162 
    Details
    ISSN: 0749-1581
    Keywords: 119Sn NMR ; [Pt(SnClxBry)3]3- complexes ; Liquid-liquid extraction ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In the presence of excess SnCl2 or SnBr2, 119Sn NMR spectroscopy shows that the complex anions [Pt(SnCl3)5]3- or [Pt(SnBr3)5]3- are exclusively extracted into chloroform containing methyltrioctylammonium chloride or bromide. Significantly, in the presence of even small amounts of chloride ion, halogen scrambling of the [Pt(SnBr3)5]3- complex anion occurs, resulting in a distribution of the [Pt(SnClxBry)5]3- species, all possible isomers of which can be observed in this solvent system at room temperature.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260300212
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