New NMR pulse sequences CT-HMBC-1 and CT-HMBC-2 which incorporate constant time evolution period are more useful than the conventional HMBC technique for improving separation of cross peaks.
3D-HMBC, A new NMR technique useful for structural studies of complicated molecules
✍ Scribed by Kazuo Furihata; Haruo Seto
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- French
- Weight
- 149 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
A new NMR technique, 3D-HMBC, which is superior to conventional 2D-HMBC in its sensitivity for detection of long-range tH-W couplings is described.
📜 SIMILAR VOLUMES
A 2D-HMQC experiment has been performed for the first time to correlate 6Li and 29Si resonances using scalar 6Li,29Si coupling in dilithium 1,4-diyl-l,4-diphenyl-l.2,3.4-tetrakis(trimethylsilyl)butane, where 2j(6Li.29Si) and 3j(6Li,29Si) amount to 0.3 and 0.7 Hz, respectively.
## Abstract It is demonstrated that in a case where neither the proton nor the natural‐abundance ^13^C‐satellite spectra of a partially oriented molecule carry enough structural information, one can determine the entire molecular geometry by the combined use of several liquid crystals as solvents.