## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a โFull Textโ option. The original article is trackable v
17O and 27Al MAS and 3QMAS NMR Study of Synthetic and Natural Layer Silicates.
โ Scribed by Sung Keun Lee; Jonathan F. Stebbins; Charles A. Jr. Weiss; R. James Kirkpatrick
- Publisher
- John Wiley and Sons
- Year
- 2003
- Weight
- 51 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0931-7597
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## Abstract The ^17^O NMR chemical shift data for a series of substituted 10โmethyleneanthrones and related 10โalkylanthrones in acetonitrile solution at 75ยฐC are reported. The ^17^O NMR chemical shift value of 10โmethyleneanthrone is shielded by __ca__. 35 ppm compared with that of anthraquinone.
## Abstract Complexation between crown ethers 12C4, 15C5, 18C6 and cryptand 222, and alkali cations Li^+^, Na^+^, K^+^ in various solvents were studied by ^17^OโNMR. spectroscopy. Small diamagnetic shifts arising from the cation electric field are observed. They increase according to the sequence K