✦ LIBER ✦
Studies of steric effects. Spectroscopic evidence for through-space interaction in CH3 …. O in crowded alcohols
✍ Scribed by Takahiro Tezuka; Masatoshi Nakagawa; Koji Yokoi; Yoshinobu Nagawa; Tohru Yamagaki; Hiroshi Nakanishi
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- French
- Weight
- 210 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
Through-space interaction of the y-methyl hydrogen with the oxygen atom in crowded tertiary aliphatic alcohols generates an abnormally low-field chemical shift in the lto NMR spectra. The intramolecular through-space attractive interaction or hydrogen bonding interaction between the y-methyl hydrogen and the oxygen lone pair (CH 3 .... O) is proposed as the cause of this shift. By this interaction, the less polar C-O bond is generated.