Solvent-Induced Deuterium Isotope Effects in13C- and15N-NMR. Spectra of Enaminones
作者:Lech Kozerski、Wolfgang von Philipsborn
DOI:10.1002/hlca.19820650715
日期:1982.11.3
effect of deuterium on the 13C and 15N chemical shifts of enaminones has been investigated. D/H isotope shifts are reported for neutral and protonated species, i.e., when the isotope is exchanged on the C(2)-, N-, or O-atoms. In cases of slow exchange the isotope shifts were obtained from solutions containing both isotopomers, whereas for fast exchange (acidic solutions) either separate NMR. sample tubes
已经研究了氘对烯胺酮的13 C和15 N化学位移的影响。据报道中性和质子化物种的D / H同位素位移,即当同位素在C(2)-,N-或O原子上交换时。在交换缓慢的情况下,同位素位移是从同时包含两种同位素异构体的溶液中获得的,而对于快速交换(酸性溶液),则需要单独的NMR。使用样品管(15 N-NMR。)或同轴管(13 C-NMR。)。