FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2022148260> ?p ?o ?g. }

• W2022148260 endingPage "470" @default.
• W2022148260 startingPage "461" @default.
• W2022148260 abstract "13C-NMR-spektroskopische Daten von elf Tetracyclo[4.1.0.02,4.03.5]heptanen, zwei Tetracyclo-[5.1.0.02,4.03,5]octanen und zwölf Tricyclo[4.1.0.02,7]hept-3-enen werden mitgeteilt. In den Tetracycloheptanen üben 7-ständige Halogene große δ-Substituenteneffekte aus, die im endo-Fall das C-4-Signal um ca. 6 ppm nach tieferem Feld rücken und im exo-Fall am C-3-Signal von der Natur des Halogens abhängige Hochfeldverschiebungen hervorrufen, wobei Fluor mit 9,1 ppm das Maximum erreicht. Ein Orbitalmodell zur Deutung der Hochfeld-δ-Effekte wird vorgeschlagen. Die fluorhaltigen Verbindungen enthüllen einen Zusammenhang zwischen den Substituenteneffekten und den zugehörigen 13C19F-Kopplungskonstanten. 5-Substituenten in Tricycloheptenen sind γ-Substituenten von C-1, C-3 und C-7 und verschieben die Absorptionen dieser Kerne nach tieferem Feld. Die Substituentenabhängigkeit der Effekte folgt etwa jener in 1-substituierten Adamantanen, ihre Gröβe übersteigt aber im Fall von C-7 die Adamantanwerte um ein Mehrfaches, wobei sich Brom mit 15,5 ppm als Spitzenreiter profiliert. Carbon-13 NMR spectroscopic data of eleven tetracyclo[4.1.0.02,4.03,5]heptanes, two tetracyclo-[5.1.0.02,4.03,5]octanes and twelve tricyclo[4.1.0.02,7]hept-3-enes are reported. In the tetracycloheptanes, halogens located at the 7-position cause large δ substituent effects. endo-Halogens shift the C-4 signal to lower field by about 6 ppm, while exo-haolgens produce upfield shifts of the C-3 signal, which are dependent on the nature of the halogen and reach a maximum of 9.1 ppm in the case of fluorine. An orbital model is proposed to explain the δ upfield shifts. The compounds containing fluorine reveal a connection between the δ substituent effects and the corresponding 13C19F coupling constants. Substituents in the 5 position of tricycloheptenes are γ-substituents of C-1, C-3 and C-7 and produce downfield shifts of the absorptions of these nuclei. Their dependence on the nature of the substituent follows approximately those in 1-substituted adamentanes; in the case of C-7, however, their magnitude by far exceeds the adamantane values, bromine (15.5 ppm) being most effective." @default.
• W2022148260 created "2016-06-24" @default.
• W2022148260 creator A5043887054 @default.
• W2022148260 creator A5052655759 @default.
• W2022148260 date "1978-09-01" @default.
• W2022148260 modified "2023-09-23" @default.
• W2022148260 title "13C-NMR-Spektren von Tetracyclo[4.1.0.02,4.03,5]heptanen, Tetracyclo[5.1.0.02,4.03,5]octanen und Tricyclo[4.1.0.02,7]hept-3-enen. Ungewöhnliche δ- und γ-Substituenteneffekte" @default.
• W2022148260 cites W1965774522 @default.
• W2022148260 cites W2001119775 @default.
• W2022148260 cites W2026063931 @default.
• W2022148260 cites W2026938940 @default.
• W2022148260 cites W2027207002 @default.
• W2022148260 cites W2035292429 @default.
• W2022148260 cites W2042424319 @default.
• W2022148260 cites W2054633852 @default.
• W2022148260 cites W2060722370 @default.
• W2022148260 cites W2070599449 @default.
• W2022148260 cites W2071173671 @default.
• W2022148260 cites W2078449156 @default.
• W2022148260 cites W2088783370 @default.
• W2022148260 cites W2090622845 @default.
• W2022148260 cites W2092218221 @default.
• W2022148260 cites W2094583253 @default.
• W2022148260 cites W2156357901 @default.
• W2022148260 cites W2318939600 @default.
• W2022148260 cites W2331464269 @default.
• W2022148260 cites W3004508309 @default.
• W2022148260 cites W3005093480 @default.
• W2022148260 cites W3005419042 @default.
• W2022148260 cites W3024110810 @default.
• W2022148260 cites W4249204679 @default.
• W2022148260 doi "https://doi.org/10.1002/mrc.1270110909" @default.
• W2022148260 hasPublicationYear "1978" @default.
• W2022148260 type Work @default.
• W2022148260 sameAs 2022148260 @default.
• W2022148260 citedByCount "17" @default.
• W2022148260 crossrefType "journal-article" @default.
• W2022148260 hasAuthorship W2022148260A5043887054 @default.
• W2022148260 hasAuthorship W2022148260A5052655759 @default.
• W2022148260 hasConcept C178790620 @default.
• W2022148260 hasConcept C185592680 @default.
• W2022148260 hasConcept C2778689049 @default.
• W2022148260 hasConcept C2780263894 @default.
• W2022148260 hasConcept C46062151 @default.
• W2022148260 hasConcept C71240020 @default.
• W2022148260 hasConceptScore W2022148260C178790620 @default.
• W2022148260 hasConceptScore W2022148260C185592680 @default.
• W2022148260 hasConceptScore W2022148260C2778689049 @default.
• W2022148260 hasConceptScore W2022148260C2780263894 @default.
• W2022148260 hasConceptScore W2022148260C46062151 @default.
• W2022148260 hasConceptScore W2022148260C71240020 @default.
• W2022148260 hasIssue "9" @default.
• W2022148260 hasLocation W20221482601 @default.
• W2022148260 hasOpenAccess W2022148260 @default.
• W2022148260 hasPrimaryLocation W20221482601 @default.
• W2022148260 hasRelatedWork W1989692008 @default.
• W2022148260 hasRelatedWork W2076364111 @default.
• W2022148260 hasRelatedWork W2884662626 @default.
• W2022148260 hasRelatedWork W2949568156 @default.
• W2022148260 hasRelatedWork W2950083444 @default.
• W2022148260 hasRelatedWork W2951305430 @default.
• W2022148260 hasRelatedWork W2952995821 @default.
• W2022148260 hasRelatedWork W2953298349 @default.
• W2022148260 hasRelatedWork W2964796947 @default.
• W2022148260 hasRelatedWork W1835813546 @default.
• W2022148260 hasVolume "11" @default.
• W2022148260 isParatext "false" @default.
• W2022148260 isRetracted "false" @default.
• W2022148260 magId "2022148260" @default.
• W2022148260 workType "article" @default.