Unusual two‐bond 13C, 13C coupling constants in sulphones
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Unusual two‐bond 13C, 13C coupling constants in sulphones. / Rücker, Christoph; Fritz, Hans.
in: Magnetic Resonance in Chemistry, Jahrgang 26, Nr. 12, 01.12.1988, S. 1103-1108.Publikation: Beiträge in Zeitschriften › Zeitschriftenaufsätze › Forschung › begutachtet
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TY - JOUR
T1 - Unusual two‐bond 13C, 13C coupling constants in sulphones
AU - Rücker, Christoph
AU - Fritz, Hans
PY - 1988/12/1
Y1 - 1988/12/1
N2 - A measurable coupling between carbon atoms through the SO2 group is observed in a series of structurally diverse sulphones. In open‐chain (single coupling path) sulphones this 2J coupling ranges from 5.5 to 27.2 Hz, while in cyclic (multiple coupling path) sulphones values ranging from 4.3 to 21.6 Hz are observed. Sulphides and sulphoxides do not exhibit a corresponding coupling of comparable magnitude. A positive sign for this coupling is derived from the data of cyclic sulphones. Whereas substituents and branching at the coupling termini exert minor influences on the coupling, the most important factor determining the magnitude of the 2J(CSC) coupling is the hybridization of the coupling carbon atoms. A linear relationship between the 2J value and the s character product of the CS bond forming C orbitals is estalished. Copyright © 1988 John Wiley & Sons, Ltd.
AB - A measurable coupling between carbon atoms through the SO2 group is observed in a series of structurally diverse sulphones. In open‐chain (single coupling path) sulphones this 2J coupling ranges from 5.5 to 27.2 Hz, while in cyclic (multiple coupling path) sulphones values ranging from 4.3 to 21.6 Hz are observed. Sulphides and sulphoxides do not exhibit a corresponding coupling of comparable magnitude. A positive sign for this coupling is derived from the data of cyclic sulphones. Whereas substituents and branching at the coupling termini exert minor influences on the coupling, the most important factor determining the magnitude of the 2J(CSC) coupling is the hybridization of the coupling carbon atoms. A linear relationship between the 2J value and the s character product of the CS bond forming C orbitals is estalished. Copyright © 1988 John Wiley & Sons, Ltd.
KW - Chemistry
KW - C NMR
KW - Geminal C, C coupling
KW - Sulphones
UR - http://www.scopus.com/inward/record.url?scp=84989046139&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/5d0247d6-0fed-3013-b742-9540429536a1/
U2 - 10.1002/mrc.1260261213
DO - 10.1002/mrc.1260261213
M3 - Journal articles
VL - 26
SP - 1103
EP - 1108
JO - Magnetic Resonance in Chemistry
JF - Magnetic Resonance in Chemistry
SN - 0749-1581
IS - 12
ER -