Zobrazeno 1 - 10
of 10
pro vyhledávání: '"David J. Calvert"'
Publikováno v:
Organic Magnetic Resonance. 12:583-586
The 13C NMR spectra of 20 polymethoxy- and/or methylenedioxyflavonols are reported. In key cases assignments have been made by examination of fully coupled spectra.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2945e17610dec08cbecc99fc20be9ac2
https://doi.org/10.1002/mrc.1270121008
https://doi.org/10.1002/mrc.1270121008
Publikováno v:
Organic Magnetic Resonance. 20:191-193
Vicinal coupling constants in the 1H and 13C NMR spectra of r-1,t-2,c-3,t-4-tetrachlorotetralin change with temperature and solvent in a manner better explained by conformational equilibration than by intramolecular or solvent-determined distortions.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cafce3c7d9db83f75681073d41b35377
https://doi.org/10.1002/mrc.1270200316
https://doi.org/10.1002/mrc.1270200316
Publikováno v:
Magnetic Resonance in Chemistry. 26:619-621
Spin–spin coupling between 14N and 13C nuclei is observed in NMR spectra of some quaternary ammonium compounds, including a series of heterocyclic cations. 1J values are in the range 2.2–4.2 Hz. Instances of coupling through two and three bonds a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dbdd175c36b3f1795dee1925c0d00b75
https://doi.org/10.1002/mrc.1260260717
https://doi.org/10.1002/mrc.1260260717
Publikováno v:
Chemischer Informationsdienst. 16
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6076ed13e3aa13511c1f15f818d922a9
https://doi.org/10.1002/chin.198514061
https://doi.org/10.1002/chin.198514061
Publikováno v:
Organic Magnetic Resonance. 11:213-214
Chemical shifts for tritons in ortho, meta and para positions in toluene have been determined using a 64 MHz tritium NMR spectrometer. The order of shift is meta>para>ortho, whereas the calculated shift order for protons is meta>ortho>para.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c1750c3a460e3a1e39cb0d626e92580e
https://doi.org/10.1002/mrc.1270110409
https://doi.org/10.1002/mrc.1270110409
Publikováno v:
Australian Journal of Chemistry. 35:1615
The selectivity of tritium labelling of double bonds by partial hydrogenation of the acetylenic analogue on Lindlar catalyst is investigated by 3H and 13C n.m.r. Examples of both the secondary isotope effect on chemical shift and the usefulness of 3H
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c4830ed0adbd9e9e2538d0bb6ae2ec82
https://doi.org/10.1071/ch9821615
https://doi.org/10.1071/ch9821615
Autor:
Judith M. Brittain, Tony C. Jones, Paul A. Newman, David J. Calvert, Peter B. D. de la Mare, Joyce M. Waters, Hitomi Suzuki
Publikováno v:
Journal of the Chemical Society, Perkin Transactions 2. :247
X-Ray crystallographic analysis of 1,1,3,4-tetrachlorotetralin-2,2-diol has shown that this compound is the trans-isomer, which can be reversibly dehydrated to give trans-1,1,3,4-tetrachlorotetralin-2-one of previously unknown configuration, produced
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d5774f50c0fafeedd842b849613bd8c0
https://doi.org/10.1039/p29830000247
https://doi.org/10.1039/p29830000247
Publikováno v:
Journal of the Chemical Society, Perkin Transactions 2. :255
The chlorinations of 1-methyl-2-naphthol, 1-bromo-2-naphthol,2,2′-dihydroxy-1,1′-dinaphthylemethane, and 6-t-butyl-2-naphthol with excess of chlorine in acetic acid give tetralin-2-ones analogous to that formed from 1-chloro-2-naphthol. 1,6-Di-t-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::242f3cf6edd1e435a8d3f0762680e062
https://doi.org/10.1039/p29830000255
https://doi.org/10.1039/p29830000255
Publikováno v:
Journal of the Chemical Society, Perkin Transactions 2. :2005
The 13C n.m.r. spectra of cyclohexa-2,5-dienones produced by bromination or nitration of a variety of methyl-substituted phenols are reported. Most of the signals have been assigned with the assistance of selective decoupling. Correlations of chemica
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::49e16ae546345cc0068c225001765de8
https://doi.org/10.1039/p29840002005
https://doi.org/10.1039/p29840002005
Publikováno v:
Journal of the Chemical Society, Perkin Transactions 2. :1015
Details of the carbon-13 n.m.r. spectra of four 1,2,3,4-tetrachlorotetralins (naphthalene tetrachlorides) and of three 1,2,3,4-tetrachloro-2-methyltetralins are presented. Chemical shifts of the signals attributable to the individual alicyclic and ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::24f82c0e67e2b8c9dd52e4af6d798175
https://doi.org/10.1039/p29810001015
https://doi.org/10.1039/p29810001015