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- W2059966591 abstract "The 1J(199Hg13C) coupling constants of isobutylmercury compounds RhgCH2CHMe2 (R = organo group) have been measured and compared to the coupling constants of diisobutylmercury and diorganomercury compounds HgR2. Between the coupling constants 1J(HgCi-Bu) and 1J(HgCR), which have been normalized to the coupling constants of the symmetric compounds concerned, a linear relation has been found. This relation, which can be deduced from the Fermi contact term on the basis of the simple hybrid orbital model, shows that the coupling constant 1J(HgCi-Bu) reflects the s-character of the mercury hybrid orbital concerned and accordingly the NMR trans-influence of the organo group R. The NMR trans-influence decreases in the sequence t-Bu > i-Pr ∼ cyclo-C6H11 > Et ∼ n-Pr ∼ n-Bu ∼ i-Bu > CH2Ph ∼ CH2CHCH2 ∼ Me > CH2SiMe3 > Ph ∼ CHCH2 > CH2SPh > CCl3 > C6Cl5 > CCPh ∼ CCH. Die 1J(199Hg13C) Kopplungskonstanten von Organylquecksilberisobutylverbindungen RHgCH2CHMe2 (R Organylgruppe) wurden gemessen und mit den Kopplungskonstanten des Quecksilberdiisobutyls und der Quecksilberdiorganoverbindungen HgR2 verglichen. Zwischen den auf die Kopplungskonstanten der entsprechenden symmetrischen Verbindung normierten Kopplungskonstanten 1J(HgCi-Bu) und 1J(HgCR) ergibt sich ein linearer Zusammenhang. Diese Beziehung, die aus der Fermi-Kontaktwechselwirkung auf der Basis des einfachen Hybridorbitalmodells abgeleitet werden kann, zeigt, dass die Kopplungskonstante 1J(HgCi-Bu) den s-Charakter des entsprechenden Quecksilberhybridorbitals und somit den NMR trans-Einfluss der Organogruppe R widerspiegelt. Dieser sinkt in der Reihe t-Bu > i-Pr ∼ cyclo-C6H11 > Et ∼ n-Pr ∼ n-Bu ∼ i-Bu > CH2Ph ∼ CH2CHCH2 ∼ Me > CH2SiMe3 > Ph ∼ CHCH2 > CH2SPh > CCL3 > C6Cl5 > CCPh ∼ CCH." @default.
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- W2059966591 date "1981-05-01" @default.
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- W2059966591 title "Über eine trans-einfluss-reihe der organylanionen aus 13C-NMR-spektroskopischen untersuchungen von organylquecksilberisobutylverbindungen" @default.
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