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  • 1990-1994  (5)
  • Inorganic Chemistry  (3)
  • 2,3-Dihydro-1-oxo-1λ4,2,3,5-thiatriazol-3-yl radicals  (1)
  • Life threatening arrhythmias  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Barium carbonate intoxication (1991)
    Springer
    Intensive care medicine 17 (1991), S. 60-62 
    Details
    ISSN: 1432-1238
    Keywords: Barium carbonate intoxication ; Life threatening arrhythmias ; Severe hypokalemia ; Hemodialysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A 22-year-old man attempted to commit suicide by swallowing an unknown amount of barium carbonate dissolved in hydrochloric acid. Shortly after ingestion, he developed crampy abdominal pain and generalized muscle weakness. About 2 h later, respiratory failure ensued necessitating orotracheal intubation and mechanical ventilation. Concomitantly, life-threatening arrhythmias including ventricular fibrillation occurred, and he had to be resuscitated for 45 min. After correction of severe hypokalemia (serum potassium 1.5 mmol/1), cardiac rhythm stabilized. In an attempt to accelerate removal of barium from the circulation hemodialysis was begun. During hemodialysis muscle strength returned. Pharmacokinetic analysis of serum barium levels suggest that hemodialysis shortened the serum half-life of barium. Subsequently, the patient made a complete and uneventful recovery. Our case demonstrates that severe barium poisoning can be survived provided that early aggressive therapeutic measures are undertaken. Hemodialysis seems to be efficacious in the therapy of barium intoxication.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01708412
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    [2.2](2,6)- and [2.2](2,5)Pyrazinophanes: Synthesis and Molecular Structure (1990)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 123 (1990), S. 523-533 
    Details
    ISSN: 0009-2940
    Keywords: Hofman 1,6-elimination / Pyrazine derivatives / [2.2]Pyrazinophanes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The title compounds 1-3 and their methyl derivatives 4-7 were synthesized 2,11-dithia[3.3]pyrazinophanes 24-26 or by Hofmann 1,6-elimination of the appropriate [(5-methyl-2-pyrazinyl)methyl]trimethylammonium hydroxides followed by dimerization of the generated 2,5-dihydro-2,5-dimethylenepyrazines. α-Chlorination of the methylpyrazines 8-10 with N-chlorosuccinimide gave the required precursors 11, 12, 14, 17 and 18. The results of the X-ray structure determinations for 1-4 and 7 which indicate an unequivocal isomer assignment are discussed with regard to steric strain in these molecules. The electronic spectra of the pyrazinophanes 7-7 are reported and compared with those of the parent methylpyrazines.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19901230319
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    1,8-Bis(diphenylamino)- and 1,8-Bis(methylphenylamino)naphthalene: Molecular Structure and Dynamic Behavior (1992)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 125 (1992), S. 723-728 
    Details
    ISSN: 0009-2940
    Keywords: 1,8-Diaminonaphthalenes, X-ray structure analysis of, conformational barriers of, dynamic behavior of ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The title compounds 2 and 3 have been synthesized from 1,8-diaminonaphthalene. The molecular structure of 2 has been determined by X-ray structure analysis and is discussed with regard to the arrangement of the peri-diphenylamino substituents in the crystalline state and the steric strain in the molecule. NMR studies of 3 reveal two conformational processes. Their nature is discussed and barriers are reported.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19921250327
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    [2.2](2,5)Pyrimidinophanes: Synthesis and molecular structure (1990)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 123 (1990), S. 1885-1889 
    Details
    ISSN: 0009-2940
    Keywords: Pyrimidine derivatives ; Sulfur extrusion, photolytic ; Pyrimidinophanes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The title compounds 1 and 2 are synthesized by photolytic sulfur extrusion from the 2,11-dithia[3.3](2,5)pyrimidinophane 17. The molecular structures of 1 and 2 are determined by X-ray structure analysis and are discussed with regard to the steric strain in these molecules. Thermolysis of [(5-methyl-2-pyrimidinyl]methyl]- or [(2-methyl-5-pyrimidinyl)methyl]-trimethylammonium hydroxide (10 or 11) does not generate 1 and 2. α-Chlorination of 2,5-dimethylpyrimidine (3) with N-chlorosuccinimide provides the required precursors 4-6.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19901230921
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  • 5
    Electronic Resource
    Electronic Resource
    ESR and ENDOR study of 2,3-dihydro-1-oxo-1λ4,2,3,5-thiatriazol-3-yl radicals (1992)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 30 (1992), S. 84-86 
    Details
    ISSN: 0749-1581
    Keywords: ESR ; Nitrogen-centred radicals ; 2,3-Dihydro-1-oxo-1λ4,2,3,5-thiatriazol-3-yl radicals ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Dehydrogenation of 2,5-dihydro-1,2,3,5-thiatriazole 1-oxides with thermally formed bis(4-methylphenyl)aminyl generated 2,3-dihydro-1-oxo-1λ4,2,3,5-thiatriazol-3-yl radicals. ESR, ENDOR and triple resonance studies in combination with 15N labelling yielded the magnitude and assignment of all 1H and 14N hyperfine coupling (HFC) constants. The radicals have a basic five-π-electron amidrazon-2-yl structure with the highest spin density at N-2.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260300117
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    Paper (German National Licenses)
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