Zobrazeno 1 - 10
of 56
pro vyhledávání: '"G. W. Buchanan"'
Autor:
Hamilton, G. W. Buchanan
Publikováno v:
The British Medical Journal, 1890 Sep . 2(1550), 629-629.
Externí odkaz:
https://www.jstor.org/stable/20240211
Publikováno v:
Canadian Journal of Chemistry. 80:148-154
The title complex crystallizes in the monoclinic P21/c space group, with a = 7.7397(8), b = 18.287(2), c = 17.4726(19) Å, β = 94.008(2)°, and Z = 4. The coordination geometry around the lithium cation is pseudooctahedral. The effects of lithium co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::52a5d1240e46ba160856ef32937691eb
https://doi.org/10.1139/v01-204
https://doi.org/10.1139/v01-204
Publikováno v:
Canadian Journal of Chemistry. 78:316-321
The title complex is asymmetric in the crystal due to the spatial orientation of the NCS function. The space group has been determined to be P21 with a = 9.496(3), b = 8.736(3), c = 9.676(3) Å, β = 117.859(5)°, and Z = 2. The solid state 13C NMR s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c07fb4aa96f6884f66cb7ee9cb9f90bf
https://doi.org/10.1139/v00-008
https://doi.org/10.1139/v00-008
Publikováno v:
Canadian Journal of Chemistry. 74:1437-1446
Large-amplitude solid phase molecular motion has been detected in the macrocyclic ring of the title crown either via 13C CPMAS NMR. To study the details of the dynamic processes, two selectively deuterated d4 derivatives have been prepared and examin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be620534a76e1fd5023e3b93b961bd1b
https://doi.org/10.1139/v96-161
https://doi.org/10.1139/v96-161
Publikováno v:
Canadian Journal of Chemistry. 73:100-105
The X-ray crystal structure of the title material indicates that the molecule possesses a pseudo-centre of inversion. A pair of O-C-C-O bonds have a trans conformation in contrast to normal gauche stereochemistry for such units in crown ethers. For t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d23e0b0e7ab30ac2f4b823a981640c6
https://doi.org/10.1139/v95-015
https://doi.org/10.1139/v95-015
Publikováno v:
Canadian Journal of Chemistry. 72:1764-1768
The X-ray crystal structure of the title material has been determined and the results are compared to previous findings for benzo-9-crown-3 itself. The 13C NMR spectrum in solution has been unambiguously assigned using COSY and HETCOR methods. The so
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5cc54a48b66690d1b2cf1886f0e1ffcf
https://doi.org/10.1139/v94-223
https://doi.org/10.1139/v94-223
Autor:
André Rodrigue, I. R. Castleden, G. W. Buchanan, K. Bourque, Suzanne Fortier, Antony C. Chiverton
Publikováno v:
Canadian Journal of Chemistry. 72:1218-1224
Solid phase 45.3 MHz 13C NMR spectra of ortho-dimethoxydiphenyl ether, 1, dibenzo[b,e]-15-crown-5- ether, 2, and tetrabenzo[b,e,q,t]-30-crown-10 ether, 3, have been obtained. Chemical shift trends are discussed in terms of the asymmetric units and st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f72a24bee18c5db20cff104e5a44886
https://doi.org/10.1139/v94-154
https://doi.org/10.1139/v94-154
Publikováno v:
Canadian Journal of Chemistry. 71:1983-1989
Using the X-ray crystal geometry as input, the 13C NMR chemical shifts of benzo-9-crown-3 ether have been calculated via ab initio methods using a localized orbital local origin (LORG) approach. Reasonable agreement is found between the calculated va
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::66ef0d257d248b9000597ecf08d2f5b2
https://doi.org/10.1139/v93-247
https://doi.org/10.1139/v93-247
Publikováno v:
Canadian Journal of Chemistry. 71:951-959
The X-ray crystal structure of the title material has been determined at −130 °C. Low-temperature 1H1H COSY, 13C1H HETCOR, and DEPT 13C NMR spectra have been recorded, which permit unambiguous assignments of all carbon resonances when ring inversi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f344034ceef5104b2f40014dd6ba9e6a
https://doi.org/10.1139/v93-127
https://doi.org/10.1139/v93-127
Publikováno v:
Canadian Journal of Chemistry. 70:1688-1695
The major isomer obtained by hydrogenation of dibenzo-24-crown-8 ether is shown to have the cis-syn-cis configuration as determined from the crystal structure of its sodium perchlorate complex. This material possesses eight-coordinate sodium with Na
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c65ee3741cef40c34c84b41713b5b06a
https://doi.org/10.1139/v92-212
https://doi.org/10.1139/v92-212