1H-detected studies of geminal 29Si13C couplings: Dependence of coupling sign and magnitude on molecular structure
✍ Scribed by Ēriks Kupč; Bernd Wrackmeyer
- Publisher
- John Wiley and Sons
- Year
- 1992
- Tongue
- English
- Weight
- 343 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0749-1581
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
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.