Why must deuterated solvents (such as D2O and CDCl3) be used to prepare NMR samples? How does the detection of a chemical property influence the original molecule? Why can organic molecules get so large? Why is boiling water not a chemical reaction?
aAll reactions were carried out under argon. Chemicals were purchased from Aldrich, Acros, or AlfaAsar, and, unless otherwise noted, were used without further purification. Flash chromatography was performed on silca gel (silca gel, 200-300 mesh). 1H NMR and13C NMR spectra were recorded on ...
1H NMR (400 MHz, CDCl3, 298 K) revealed δ 4.409 (s, 2H, NCH2CO), 7.473 (t, 2H, J = 8.0 Hz, meta-H), 7.551 (t, 1H, J = 6 Hz, para-H), and 7.977 (d, 2H, J = 7.6 Hz, ortho-H). This spectrum is consistent with that previously published [47]. The ESI mass ...