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1 H‐detected studies of geminal 29 Si 13 C couplings: Dependence of coupling sign and magnitude on molecular structure
Author(s) -
Kupč Ēriks,
Wrackmeyer Bernd
Publication year - 1992
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260301006
Subject(s) - geminal , chemistry , coupling constant , resonance (particle physics) , sign (mathematics) , crystallography , organosilicon , coupling (piping) , spectral line , analytical chemistry (journal) , stereochemistry , atomic physics , physics , mathematical analysis , mathematics , organic chemistry , particle physics , astronomy , mechanical engineering , chromatography , engineering
The magnitude and signs of geminal 29 SiZ 13 C coupling constants were determined for nine derivatives of representative organosilicon compounds [Z = C(sp 2 , sp 3 ), N, O, (two‐ and three‐coordinate), Si, S] from 1 H‐detected two‐dimensional (2D) Ψ‐BIRD‐HSQC and Ψ‐BIRD‐HMQC pseudo‐triple resonance 1 H 29 Si( 13 C) and 1 H 13 C( 29 Si) experiments. The high sensitivity of the method allowed the measurements to be carried out in less than 1 h using 2–10 mg of the respective compound. Couplings as small as 0.45 Hz have been resolved. The couplings ranged from −21.4 to +2.2 Hz, showing regular dependence on the nature, hybridization and coordination of the intervening Z atom.