Solvent dependent N-14 chemical shifts in quinoline
Pathan, S; Khanzada, AWK
| HERO ID | 1175955 |
|---|---|
| In Press | No |
| Year | 1999 |
| Title | Solvent dependent N-14 chemical shifts in quinoline |
| Authors | Pathan, S; Khanzada, AWK |
| Journal | Journal of the Chemical Society of Pakistan |
| Volume | 21 |
| Issue | 4 |
| Page Numbers | 344-346 |
| Abstract | N-14 chemical shifts of neat quinoline and 90% quinoline in different solvents have been measured. DMSO-d(6) was used as an internal locking agent NH4NO3 wits used as an external standard. The N-14 chemical shift of neat quinoline with respect to NO3. ion is -71.75 ppm previously reported N-14 chemical shifts by this group in pure quinoline was -72 +/- 2 ppm in external lock mode. The internal lock result are more accurate. The chemical shifts of 90% quinoline in carbon tetrachloride, chloroform and dioxane are nearly the same i.e -71.57, -73.61 and -70.14 ppm respectively.The N-14- chemical shifts of 90% quinoline in water and methanol are relatively low i.e. -135.87 and -109.96 ppm respectively. This is due to hydrogen-bonding of nitrogen with water and methanol. In DMSO and acetone the N-14 chemical shifts are - 63.41 and -62.78 ppm respectively. This may be due to complex formation of these compounds with quinoline. In all such cases N-14 studies has been done at a frequency of 6.43 MHz using JEOL FX 90Q FT NMR. To avoid the base line rolling due to low frequency and acoustic ringing a delay time of 400 mus has been used.< |
| Wosid | WOS:000165552100003 |
| Url | https://www.scopus.com/inward/record.uri?eid=2-s2.0-0033266829&partnerID=40&md5=8921b2a7f630c7ad77a60a1385653bbb |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Source: Web of Science 000165552100003 |
| Is Public | Yes |
| Language Text | English |
| Is Qa | No |