Direct observations of 1J(11B, 14N) coupling constants by 11B NMR spectroscopy

✍ Scribed by Abdeljalil Ouassas; Jean-Claude Duplan; Bernard Fenet; Bernard Frange

• Publisher: John Wiley and Sons
• Year: 1990
• Tongue: English
• Weight: 270 KB
• Volume: 28
• Category: Article
• ISSN: 0749-1581
• DOI: 10.1002/mrc.1260280807

✦ Synopsis

Abstract

The reaction B(NCS)~4~^−^ + BX~4~^−^ (X = F, Cl, Br) leads to mixed BX~n~(NCS) (n = 1, 2, 3) species easily detected in solution by ^11^B NMR. Further, with X = Cl, ^1^J(^11^B, ^14^N) values could be measured from the ^11^B NMR spectra (25.6, 24.5 and 21.4 Hz for n = 3, 2 and 1, respectively). For X = F, the relevant ^1^J(^11^B, ^14^N) values (24.3, 25.2 and 28 Hz for n = 3, 2 and 1, respectively) increase in the same order as the related ^1^J(^11^B, ^19^F) (5.5, 12.7 and 20.0 Hz, respectively). No such ^1^J(^11^B, ^14^N) could be resolved for X = Br.