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  • 1965-1969  (6)
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  • 1965-1969  (6)
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  • 1
    Online Resource
    Online Resource
    Piezoelectric Ceramics—Their Indigenous Development and Production
    Informa UK Limited ; 1968
    In:  Transactions of the Indian Ceramic Society Vol. 27, No. 1 ( 1968-01), p. 13N-18N
    Details
    In: Transactions of the Indian Ceramic Society, Informa UK Limited, Vol. 27, No. 1 ( 1968-01), p. 13N-18N
    Type of Medium: Online Resource
    ISSN: 0371-750X , 2165-5456
    URL: Article
    DOI: 10.1080/0371750X.1968.10855660
    Language: English
    Publisher: Informa UK Limited
    Publication Date: 1968
    detail.hit.zdb_id: 2666000-3
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  • 2
    Online Resource
    Online Resource
    13 C n.m.r. studies. X. 13 C spectra of some substituted methyl benzoates
    Canadian Science Publishing ; 1967
    In:  Canadian Journal of Chemistry Vol. 45, No. 3 ( 1967-02-01), p. 233-238
    Details
    In: Canadian Journal of Chemistry, Canadian Science Publishing, Vol. 45, No. 3 ( 1967-02-01), p. 233-238
    Abstract: The 13 C spectra of the methyl esters of 20 substituted benzoic acids have been recorded, and the chemical shifts of the carbon nuclei of the carbomethoxyl group and aromatic ring have been measured. These shielding results are discussed and compared with the corresponding data for similar series of acetophenones and anisoles. Some evidence of steric inhibition of conjugation is presented for certain diortho-substituted examples.
    Type of Medium: Online Resource
    ISSN: 0008-4042 , 1480-3291
    URL: Article
    DOI: 10.1139/v67-045
    RVK:
    VA 2870
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1967
    detail.hit.zdb_id: 1482256-8
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  • 3
    Online Resource
    Online Resource
    13 C N.M.R. STUDIES: PART IV. CARBON-13 N.M.R. SPECTRA OF SOME ALKYL PHENYL KETONES
    Canadian Science Publishing ; 1965
    In:  Canadian Journal of Chemistry Vol. 43, No. 2 ( 1965-02-01), p. 498-509
    Details
    In: Canadian Journal of Chemistry, Canadian Science Publishing, Vol. 43, No. 2 ( 1965-02-01), p. 498-509
    Abstract: The 15.1 Mc/s 13 C n.m.r. spectra of 21 substituted alkyl phenyl ketones, ArCOR, have been determined and the 13 C chemical shifts measured. This group of compounds included examples of each of the ethyl, isopropyl, and t-butyl phenyl ketone series. Variations of the chemical shifts with structure are analyzed and compared with the results for substituted acetophenones. The study of steric inhibition of conjugation in these compounds by means of their 13 C data is discussed in detail. The parameters for the acetyl carbons for a few methyl aryl ketones have been determined as well to examine the effect of orientation of this group on a polycyclic aromatic skeleton.
    Type of Medium: Online Resource
    ISSN: 0008-4042 , 1480-3291
    URL: Article
    DOI: 10.1139/v65-065
    RVK:
    VA 2870
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1965
    detail.hit.zdb_id: 1482256-8
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  • 4
    Online Resource
    Online Resource
    13 C N.M.R. STUDIES: PART III. CARBON-13 N.M.R. SPECTRA OF SUBSTITUTED ACETOPHENONES
    Canadian Science Publishing ; 1965
    In:  Canadian Journal of Chemistry Vol. 43, No. 2 ( 1965-02-01), p. 479-497
    Details
    In: Canadian Journal of Chemistry, Canadian Science Publishing, Vol. 43, No. 2 ( 1965-02-01), p. 479-497
    Abstract: The 15.1 Mc/s 13 C n.m.r. spectra of 55 substituted acetophenones have been examined and the chemical shifts of the various carbon nuclei determined. This series included a variety of monosubstituted cases (ortho, meta, and para) as well as several polysubstituted examples. The factors contributing to the observed shieldings of all carbon nuclei are considered. The aromatic shieldings are compared with previous results for other aromatic derivatives. The application of the carbonyl shifts to the study of steric inhibition of resonance in these derivatives is examined critically. The shieldings of the acetyl methyl and para-carbon nuclei are found to offer confirmatory evidence for the existence of steric hindrance to coplanarity of the acetyl group in several ortho-substituted cases.
    Type of Medium: Online Resource
    ISSN: 0008-4042 , 1480-3291
    URL: Article
    DOI: 10.1139/v65-064
    RVK:
    VA 2870
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1965
    detail.hit.zdb_id: 1482256-8
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  • 5
    Online Resource
    Online Resource
    13 C N.M.R. STUDIES: PART V. CARBON-13 SPECTRA OF SOME SUBSTITUTED STYRENES
    Canadian Science Publishing ; 1965
    In:  Canadian Journal of Chemistry Vol. 43, No. 2 ( 1965-02-01), p. 510-520
    Details
    In: Canadian Journal of Chemistry, Canadian Science Publishing, Vol. 43, No. 2 ( 1965-02-01), p. 510-520
    Abstract: The 15.1 Mc/s 13 C n.m.r. spectra of 23 substituted styrenes have been examined and the shieldings of the various carbon nuclei determined. Several meta- and para-substituted derivatives were included to study the effects of polar substituents on the vinyl carbon chemical shifts. In agreement with previous proposals, a linear correlation with the Hammett σ parameter is found for the β-carbon shieldings, but not for those of the α-carbons. Nine ortho-substituted examples and two α-substituted compounds were investigated to compare their chemical shifts with results for related carbonyl compounds. While the 13 C data exhibit marked differences in the hindered compounds, the variations differ from those observed in the more polar carbonyl systems.
    Type of Medium: Online Resource
    ISSN: 0008-4042 , 1480-3291
    URL: Article
    DOI: 10.1139/v65-066
    RVK:
    VA 2870
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1965
    detail.hit.zdb_id: 1482256-8
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  • 6
    Online Resource
    Online Resource
    13 C N.M.R. STUDIES: VIII. 13 C SPECTRA OF SOME SUBSTITUTED ANISOLES
    Canadian Science Publishing ; 1966
    In:  Canadian Journal of Chemistry Vol. 44, No. 23 ( 1966-12-01), p. 2855-2866
    Details
    In: Canadian Journal of Chemistry, Canadian Science Publishing, Vol. 44, No. 23 ( 1966-12-01), p. 2855-2866
    Abstract: The 13 C nuclear magnetic resonance spectra of a series of 40 substituted anisoles have been obtained to investigate the effects of substitution on the aromatic and methoxyl carbon shieldings. This work extends our studies on the variations of chemical shifts of carbon nuclei in side chains of aryl derivatives. The question of steric hindrance to conjugative interaction of a methoxyl group with an aromatic ring is considered on the basis of the present results. Evidence of a steric effect in compounds in which both ortho positions are substituted is presented.
    Type of Medium: Online Resource
    ISSN: 0008-4042 , 1480-3291
    URL: Article
    DOI: 10.1139/v66-425
    RVK:
    VA 2870
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1966
    detail.hit.zdb_id: 1482256-8
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