Proton NMR relaxation and molecular motion of long-chain cyclic paraffins in the solid state
β Scribed by Masami Takenaka; Takeshi Yamanobe; Tadashi Komoto; Isao Ando; Hisaya Sato; Kazuo Sato
- Publisher
- John Wiley and Sons
- Year
- 1987
- Tongue
- English
- Weight
- 485 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0887-6266
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π SIMILAR VOLUMES
The molecular motions of D-a-galacturonic acid monohydrate GA and its derivative methyl-a-D-galacturonic acid Ε½ . 1 methyl ester monohydrate MGAM in the solid state have been studied using H NMR. Both protonated and deuterium exchanged samples have been used. Spin-lattice relaxation times in the la
Using dynamic 15N CPMAS NMR spectroscopy a novel double proton transfer was detected in the cyclic hydrogen bonded dimers of polycrystalline tSN,ZSN'-di-(4-bromophenyl)-formamidine. Rate constants of this process, which is degenerate within the margin of error, were obtained by lineshape (kl2 = 10 6