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• W2054763017 abstract "Die Kopplungskonstanten 1J(13C11B) und 1J(13C1H) sowie die chemischen Verschiebungen δ11B und δ13C werden für Verbindungen des Typs R3-nBXn (R = CH3; X = N(CH3)2, OCH3, SCH3; n = 0, 1, 2, 3) angegeben. Zur Messung wurden Doppel- und Tripel-Resonanz-Experimente 1H-{11B}, 1H-{13C}, 1H-{13C,11B} herangezogen. Doppelresonanzstudien 1H-{11B} sind für die Untersuchung von Ligandenaustauschvorgängen nützlich. Zwischen δ13C der borgebundenen Methylgruppen und δ11B der untersuchten Verbindungen besteht eine lineare Beziehung. Die Kopplungskonstanten 1J(13C11B) überstreichen einen relativ großen Bereich. Der Vergleich mit strukturverwandten Kohlenstoffverbindungen zeigt, daß sich diese nicht alleine mit Änderungen des s-Charakters in der BC-Bindung oder der Liganden-Elektronegativität von X erklären lassen. Nuclear Magnetic Resonance Studies on Boron Compounds, IX. Heteronuclear Double and Triple Resonance Measurements 1H-{11B}, 1H-{13C},1H-{11B, 13C} on Simple Organoboranes Coupling constants 1J(13C11B) and 1J(13C11H) as well as chemical shifts δ11B and δ13C have been determined in compounds of the type R3-nBXn (R = CH3; X = N(CH3)2, OCH3, SCH3; n = 0,1,2,3) by double and triple resonance experiments 1H-{11B}, 1H-{13C}, and 1H-{11B, 13C}. Double resonance studies 1H-{11B} are useful for investigating ligand exchange processes. There is a linear relationship for the compounds studied between δ13C of the methyl group bound to boron and δ11B. A relatively large range is observed for the coupling constants 1J(13C11B). The comparison with corresponding data of structurally related carbon compounds shows that there is no simple explanation in terms of changes of the s-character in the BC-bond and electronegativity of the ligands X." @default.
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• W2054763017 title "Kernresonanzspektroskopische Untersuchungen an Borverbindungen, IX. Heteronucleare Doppel‐ und Tripel‐Resonanz‐Messungen ¹ H‐{ ¹¹ B}, ¹ H‐{ ¹³ C}, ¹ H‐{ ¹¹ B, ¹³ C} an einfachen Organoboranen" @default.
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• W2054763017 doi "https://doi.org/10.1002/cber.19751081216" @default.
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