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Relative Signs of 29Si-13C Couplings

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F08%3A00309022" target="_blank" >RIV/67985858:_____/08:00309022 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Relative Signs of 29Si-13C Couplings

  • Original language description

    Two pulse sequences applicable to the determination of relative signs of coupling constants, gHSQC RELAY(P) and gHSQC RELAY(D), were developed and tested. These sequences are suitable for determination of relative signs of long-range coupling constants between two heteronuclei of low abundance (such as 29Si and 13C) and are applicable even to cases in which one of the heteronuclei (29Si) does not exhibit coupling with some of the detected protons (1H). The two sequences differ in the manner in which they suppress undesirable homonuclear coherence transfers. Each of the sequences can be combined with an isotope filter for better suppression of the centerlines arising from more abundant, NMR-inactive isotopes. The sequences were tested on ethoxytrimethylsilane and (E)-(buta-1,3-dienyloxy)trimethylsilane, and we conclude that 2J(29Si O 13C) is positive while 3J(29Si O C 13C) is negative in both compounds.

  • Czech name

    Relativni znaménka 29Si-13C couplingu

  • Czech description

    Byly vyvinuty a testovány pulsní sekvence gHSQC-RELAY (P) and gHSQC-RELAY (D). Tyto sekvence jsou vhodné k detekci relativních znamének long-range coupling konstant (<2Hz) mezi dvěma heterojádry o nízkém přirozeném zastoupení (jako je 29Si a 13C), a to iv případě, že některé detekované protony nejsou couplovaáy k 29Si. Sekvence se liší ve způsobu, jak potlažují nežádoucí homojaderné polarizační přenosy. Sekvence byly testovány na ethoxytrimetkylsilanu a na (E)-(buta-1,3-dienyloxy)trimethylsilanu s výsledkem, že 2J(29Si-O-13C) je pozitivní a 3J(29Si-O-C-13C) je negativní v obou případech.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    CF - Physical chemistry and theoretical chemistry

  • OECD FORD branch

Result continuities

  • Project

    Result was created during the realization of more than one project. More information in the Projects tab.

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2008

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Magnetic Resonance in Chemistry

  • ISSN

    0749-1581

  • e-ISSN

  • Volume of the periodical

    46

  • Issue of the periodical within the volume

    8

  • Country of publishing house

    GB - UNITED KINGDOM

  • Number of pages

    5

  • Pages from-to

  • UT code for WoS article

    257727200006

  • EID of the result in the Scopus database