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  • Canadian Science Publishing  (4)
  • 1975-1979  (4)
  • Chemistry/Pharmacy  (4)
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  • Canadian Science Publishing  (4)
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  • 1975-1979  (4)
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Subjects(RVK)
  • Chemistry/Pharmacy  (4)
RVK
  • 1
    Online Resource
    Online Resource
    Isomérisation thermique de vinyl-2 aziridines N-substituées
    Canadian Science Publishing ; 1976
    In:  Canadian Journal of Chemistry Vol. 54, No. 10 ( 1976-05-15), p. 1590-1598
    Details
    In: Canadian Journal of Chemistry, Canadian Science Publishing, Vol. 54, No. 10 ( 1976-05-15), p. 1590-1598
    Abstract: The thermal isomerization of 2-vinylaziridines, variously substituted on the ring and the double bond, has been studied. The nature of the products formed depends on the nature of the substituents in positions 1 and 3. If the ring carbon-3 carries a phenyl substituent, the thermolysis yields, in most cases, a Δ-2-pyrroline. With unsubstituted or 3-alkylaziridines the reaction proceeds, depending on the nature of the substituent on the nitrogen, either to an ethylene imine or to a mixture of Δ-2- and Δ-3-pyrrolines. Mechanisms to interpret the experimental results are proposed. [Journal translation]
    Type of Medium: Online Resource
    ISSN: 0008-4042 , 1480-3291
    URL: Article
    DOI: 10.1139/v76-228
    RVK:
    VA 2870
    Language: French
    Publisher: Canadian Science Publishing
    Publication Date: 1976
    detail.hit.zdb_id: 1482256-8
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Etude structurale des chlorure et sulfate de béryllium hydratés par spectrométrie infrarouge et Raman
    Canadian Science Publishing ; 1979
    In:  Canadian Journal of Chemistry Vol. 57, No. 8 ( 1979-04-15), p. 913-919
    Details
    In: Canadian Journal of Chemistry, Canadian Science Publishing, Vol. 57, No. 8 ( 1979-04-15), p. 913-919
    Abstract: The authors have investigated the nature of the compound which is formed by direct hydration of beryllium chloride. The compound is analysed by chemical means, by infrared and Raman spectroscopy, and by comparison with the spectra of tetrahydrated sulphate. The results are consistent with the formula [Be(OH)(H 2 O) 2 + Cl − ] n .A cyclic trimeric compound is assumed and a simplified coordinate analysis is performed in order to support these assignments. [Journal translation]
    Type of Medium: Online Resource
    ISSN: 0008-4042 , 1480-3291
    URL: Article
    DOI: 10.1139/v79-150
    RVK:
    VA 2870
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1979
    detail.hit.zdb_id: 1482256-8
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    Online Resource
  • 3
    Online Resource
    Online Resource
    Composés carbonylés aromatiques: traitement semi-empirique des influences structurales sur leur basicité
    Canadian Science Publishing ; 1976
    In:  Canadian Journal of Chemistry Vol. 54, No. 2 ( 1976-01-15), p. 297-302
    Details
    In: Canadian Journal of Chemistry, Canadian Science Publishing, Vol. 54, No. 2 ( 1976-01-15), p. 297-302
    Abstract: We have calculated the total electron density q t 0 at the oxygen atom, to the CNDO II approximation, for twenty-five compounds of the type [Formula: see text] where X = NO 2 , Cl, H, CH 3 , OMe, and [Formula: see text] and [Formula: see text] A linear variation of pK as a function of q t 0 is shown by a set of four essentially parallel lines; the separation of the lines could be attributed to variations in the solvent effect which depend on the nature of R. A more general treatment of all the results, using a single equation ΔpK = 154Δq t 0  + 0.1, allows an evaluation of the effect of structure on the basicity of a carbonyl compound whatever might be the nature of X or R. [Journal translation]
    Type of Medium: Online Resource
    ISSN: 0008-4042 , 1480-3291
    URL: Article
    DOI: 10.1139/v76-044
    RVK:
    VA 2870
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1976
    detail.hit.zdb_id: 1482256-8
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  • 4
    Online Resource
    Online Resource
    Cinétique de la formation de la métalloporphyrine Cu(II)—dérivé tétra éthylènediamino de la protoporphyrine IX (ENP) en milieu aqueux
    Canadian Science Publishing ; 1979
    In:  Canadian Journal of Chemistry Vol. 57, No. 22 ( 1979-11-15), p. 2916-2922
    Details
    In: Canadian Journal of Chemistry, Canadian Science Publishing, Vol. 57, No. 22 ( 1979-11-15), p. 2916-2922
    Abstract: The kinetics of formation of the metalloporphyrin Cu(II)–ENP is dependent on the pH due to the protonation of the pyrrol nitrogen atoms and the protonation of the diamino groups of the side chains. The degree of protonation of these side chains also influences the degree of association of the prophyrin and the metalloporphyrin in solution. The order of reaction with respect to the porphyrin is not unity, a consequence of an inhibition by the reaction product; this inhibition operates via the formation of a new species, a mixed complex of porphyrin–metalloporphyrin of low reactivity.The order of reaction with respect to Cu(II) is also not unity, a consequence of the chelation of Cu(II) by the diamino groups of the side chains. The presence of Cu(II) ligands influence both the reaction kinetics and the nature of the final reaction product. [Journal translation]
    Type of Medium: Online Resource
    ISSN: 0008-4042 , 1480-3291
    URL: Article
    DOI: 10.1139/v79-476
    RVK:
    VA 2870
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1979
    detail.hit.zdb_id: 1482256-8
    Location Call Number Limitation Availability
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