13C chemical shifts of symmetrically substituted biphenyls: Unambiguous signal assignment for the carbons ortho and para to an aryl group
Identifieur interne : 001599 ( Main/Exploration ); précédent : 001598; suivant : 00160013C chemical shifts of symmetrically substituted biphenyls: Unambiguous signal assignment for the carbons ortho and para to an aryl group
Auteurs : Karou Fuji [Japon] ; Toshihide Yamada [Japon] ; Eiichi Fujita [Japon]Source :
- Organic Magnetic Resonance [ 0030-4921 ] ; 1981-12.
Abstract
The natural abundance 13C NMR spectra of 2,2′‐dimethyl‐, 2,2′‐dimethoxy‐ and 2,2′‐dihydroxybiphenyls, and a series of 2,2′‐dimethoxy‐5,5′‐disubstituted biphenyls were recorded. Unambiguous signal assignments of the carbons ortho and para to an aryl ring in biphenyls were made by selective deuteration and/or the graphical method for 1H single frequency off‐resonance decoupled spectra. Contrary to the reported assignments, it was shown that the signal for C‐6 in 2,2′‐dimethylbiphenyl clearly appears at lower field than that for C‐4. The signals for the ortho carbons (C‐6) of 2,2′‐dimethoxy‐5,5′‐disubstituted biphenyls generally appeared at lower fields than those for the para carbons (C‐4). The validity of applying deuterium isotope shifts to the assignments of 13C chemical shifts of di‐ and tetra‐substituted biphenyls is also discussed.
Url:
DOI: 10.1002/mrc.1270170406
Affiliations:
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: 001142
- to stream Istex, to step Curation: 000C83
- to stream Istex, to step Checkpoint: 000E60
- to stream Main, to step Merge: 001670
- to stream Main, to step Curation: 001599
Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">13C chemical shifts of symmetrically substituted biphenyls: Unambiguous signal assignment for the carbons ortho and para to an aryl group</title><author><name sortKey="Fuji, Karou" sort="Fuji, Karou" uniqKey="Fuji K" first="Karou" last="Fuji">Karou Fuji</name></author><author><name sortKey="Yamada, Toshihide" sort="Yamada, Toshihide" uniqKey="Yamada T" first="Toshihide" last="Yamada">Toshihide Yamada</name></author><author><name sortKey="Fujita, Eiichi" sort="Fujita, Eiichi" uniqKey="Fujita E" first="Eiichi" last="Fujita">Eiichi Fujita</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:6C57D1FC15975D90FC58255588579D4707589CE6</idno><date when="1981" year="1981">1981</date><idno type="doi">10.1002/mrc.1270170406</idno><idno type="url">https://api.istex.fr/document/6C57D1FC15975D90FC58255588579D4707589CE6/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">001142</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">001142</idno><idno type="wicri:Area/Istex/Curation">000C83</idno><idno type="wicri:Area/Istex/Checkpoint">000E60</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">000E60</idno><idno type="wicri:doubleKey">0030-4921:1981:Fuji K:c:chemical:shifts</idno><idno type="wicri:Area/Main/Merge">001670</idno><idno type="wicri:Area/Main/Curation">001599</idno><idno type="wicri:Area/Main/Exploration">001599</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">13C chemical shifts of symmetrically substituted biphenyls: Unambiguous signal assignment for the carbons ortho and para to an aryl group</title><author><name sortKey="Fuji, Karou" sort="Fuji, Karou" uniqKey="Fuji K" first="Karou" last="Fuji">Karou Fuji</name><affiliation wicri:level="4"><country xml:lang="fr">Japon</country><wicri:regionArea>Institute for Chemical Research, Kyoto University, Uji, Kyoto‐Fu</wicri:regionArea><orgName type="university">Université de Kyoto</orgName><placeName><settlement type="city">Kyoto</settlement><region type="prefecture">Région du Kansai</region></placeName></affiliation></author><author><name sortKey="Yamada, Toshihide" sort="Yamada, Toshihide" uniqKey="Yamada T" first="Toshihide" last="Yamada">Toshihide Yamada</name><affiliation wicri:level="4"><country xml:lang="fr">Japon</country><wicri:regionArea>Institute for Chemical Research, Kyoto University, Uji, Kyoto‐Fu</wicri:regionArea><orgName type="university">Université de Kyoto</orgName><placeName><settlement type="city">Kyoto</settlement><region type="prefecture">Région du Kansai</region></placeName></affiliation></author><author><name sortKey="Fujita, Eiichi" sort="Fujita, Eiichi" uniqKey="Fujita E" first="Eiichi" last="Fujita">Eiichi Fujita</name><affiliation wicri:level="4"><country xml:lang="fr">Japon</country><wicri:regionArea>Institute for Chemical Research, Kyoto University, Uji, Kyoto‐Fu</wicri:regionArea><orgName type="university">Université de Kyoto</orgName><placeName><settlement type="city">Kyoto</settlement><region type="prefecture">Région du Kansai</region></placeName></affiliation><affiliation wicri:level="4"><country xml:lang="fr" wicri:curation="lc">Japon</country><wicri:regionArea>Institute for Chemical Research, Kyoto University, Uji, Kyoto‐Fu</wicri:regionArea><orgName type="university">Université de Kyoto</orgName><placeName><settlement type="city">Kyoto</settlement><region type="prefecture">Région du Kansai</region></placeName></affiliation></author></analytic><monogr></monogr><series><title level="j">Organic Magnetic Resonance</title><title level="j" type="abbrev">Org. Magn. Reson.</title><idno type="ISSN">0030-4921</idno><idno type="eISSN">1097-458X</idno><imprint><publisher>John Wiley & Sons Limited</publisher><pubPlace>New York</pubPlace><date type="published" when="1981-12">1981-12</date><biblScope unit="volume">17</biblScope><biblScope unit="issue">4</biblScope><biblScope unit="page" from="250">250</biblScope><biblScope unit="page" to="256">256</biblScope></imprint><idno type="ISSN">0030-4921</idno></series><idno type="istex">6C57D1FC15975D90FC58255588579D4707589CE6</idno><idno type="DOI">10.1002/mrc.1270170406</idno><idno type="ArticleID">MRC1270170406</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0030-4921</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The natural abundance 13C NMR spectra of 2,2′‐dimethyl‐, 2,2′‐dimethoxy‐ and 2,2′‐dihydroxybiphenyls, and a series of 2,2′‐dimethoxy‐5,5′‐disubstituted biphenyls were recorded. Unambiguous signal assignments of the carbons ortho and para to an aryl ring in biphenyls were made by selective deuteration and/or the graphical method for 1H single frequency off‐resonance decoupled spectra. Contrary to the reported assignments, it was shown that the signal for C‐6 in 2,2′‐dimethylbiphenyl clearly appears at lower field than that for C‐4. The signals for the ortho carbons (C‐6) of 2,2′‐dimethoxy‐5,5′‐disubstituted biphenyls generally appeared at lower fields than those for the para carbons (C‐4). The validity of applying deuterium isotope shifts to the assignments of 13C chemical shifts of di‐ and tetra‐substituted biphenyls is also discussed.</div></front></TEI><affiliations><list><country><li>Japon</li></country><region><li>Région du Kansai</li></region><settlement><li>Kyoto</li></settlement><orgName><li>Université de Kyoto</li></orgName></list><tree><country name="Japon"><region name="Région du Kansai"><name sortKey="Fuji, Karou" sort="Fuji, Karou" uniqKey="Fuji K" first="Karou" last="Fuji">Karou Fuji</name></region><name sortKey="Fujita, Eiichi" sort="Fujita, Eiichi" uniqKey="Fujita E" first="Eiichi" last="Fujita">Eiichi Fujita</name><name sortKey="Fujita, Eiichi" sort="Fujita, Eiichi" uniqKey="Fujita E" first="Eiichi" last="Fujita">Eiichi Fujita</name><name sortKey="Yamada, Toshihide" sort="Yamada, Toshihide" uniqKey="Yamada T" first="Toshihide" last="Yamada">Toshihide Yamada</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Terre/explor/NickelMaghrebV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 001599 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 001599 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Terre
|area= NickelMaghrebV1
|flux= Main
|étape= Exploration
|type= RBID
|clé= ISTEX:6C57D1FC15975D90FC58255588579D4707589CE6
|texte= 13C chemical shifts of symmetrically substituted biphenyls: Unambiguous signal assignment for the carbons ortho and para to an aryl group
}}
| This area was generated with Dilib version V0.6.27. |  |