## Abstract Absolute values of (79) geminal ^2^__J__(^29^Si‐O‐^29^Si) couplings were measured in an extensive series of (55) unstrained siloxanes dissolved in chloroform‐__d__. Signs of ^2^__J__(^29^Si‐O‐^29^Si) in some (9) silicon hydrides were determined relative to ^1^__J__(^29^Si‐^1^H) which ar
29Si-29Si Long Range Couplings in Strained Cyclic Polysilanes
✍ Scribed by Mutsumi Kuroda; Dr. Yoshio Kabe; Dr. Masayuki Hashimoto; Prof. Dr. Satoru Masamune
- Book ID
- 102726769
- Publisher
- John Wiley and Sons
- Year
- 1988
- Tongue
- English
- Weight
- 574 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0044-8249
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📜 SIMILAR VOLUMES
## Abstract The absolute values of spin–spin couplings between ^29^Si nuclei in siloxanes, ^2^__J__(^29^SiO^29^Si), were determined. The couplings are small and cover a narrow range of values (0–5 Hz). The coupling constants depend on the branching or on the number of electronegative substituents
## Abstract Schemes for sensitive measurements of spin–spin coupling constants between rare nuclei with low magnetogyric ratios are considered and two combinations of INEPT with gradient versions of (X,Y)HMQC and (X,Y)COSY are suggested as particularly suitable for ^29^Si,^13^C couplings. It is dem
## Abstract The gradient pulse sequences for measurement of small long‐range couplings between heteronuclei (^29^Si^13^C) in natural abundance reported to date (INEPT‐(Si,C)gCOSY and INEPT‐(Si,C,Si)HMQC) suffer from significant signal loss when these nuclei (^29^Si, ^13^C) are coupled through one‐